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CHEMICAL PROBLEMS 2024 no. 4 (22) ISSN 2221-8688
525
UDC 541.49+546.92+539.26
SYNTHESIS, CHARACTERIZATION, STUDY OF MOLECULAR DOCKING AND BIOLOGICAL ACTIVITY OF MIXED LIGANDS PLATINUM (II) COMPLEXES WITH 2-((5-CHLOROQUINOLIN-8-YL)OXY) ACETOHYDRAZIDE AND TERTIARY DI
PHOSPHINES
Afraa Sabir Shihab
Department of Chemistry/ College ofEducation for Pure Sciences/ Tikrit University, Iraq
e-mail: [email protected] https://orcid.org/0000-0003-1006-5919
Received 15.05.2024 Accepted 26.07.2024
Abstract. This study involves the preparation of various organic compounds. Ethylnyl 2-((5-chloroquinolin-8-yl)oxy)acetate compound (A1) was synthesized by adding Potassium carbonate to quinoline and ethyl chloroacetate. The 2-((5-Chloroquinolin-8-yl)oxy) acetohydrazide (A2) was prepared by reacting compound (A1) with hydrazide. Complex of (A3) were obtained by reacting equimolar amounts of compound (A2) with the Platinum salt solution of using ethanol as the solvent. Phosphinate complexes were prepared by reacting equal moles of the complex (A3) with the various phosphines used and using ethanol as a solvent. The synthesized compounds and complexes were characterized using various spectroscopic techniques, including Fourier-Transform Infrared (FT-IR) spectroscopy, Uv-Vis spectrum and Nuclear Magnetic Resonance (31P, 1H, and 13C-NMR) spectroscopy. Additionally, their melting points, purity, molar conductivity, and magnetic susceptibility were determined. The impact of some prepared compounds and complexes on the growth of two antibiotic-resistant bacterial strains, namely the Gram-positive Staphylococcus and the Gram- negative Escherichia coli, was studied. Ciprofloxacin was used as control antibiotics. Some of the synthesized compounds exhibited significant inhibitory activity against the tested bacterial strains. Keywords: Chloroquinolin-8-ol, Ester, Tertiary diphosphines, Complexes, Biological Activity. DOI: 10.32737/2221-8688-2024-4-525-539
1. Introduction
The interesting pharmacological properties of quinoline derivatives and complexes have been associated with these compounds showing great effectiveness against bacteria [1-4] and also against cancerous tumors [5-7], in addition, quinoline complexes with transition metals were of great importance in organometallic chemistry and coordinate chemistry [8-10]. The 2-((5-Chloroquinolin-8-yl) oxy) Aceto hydrazide derivative and its coordinate with platinum metal were rare. For this we studied in this research (Platinum (II) Complexes with 2-((5-Chloroquinolin-8-yl) oxy) Aceto hydrazide and diphosphines) where the quinolone derivative was bonded with
platinum through the atom of nitrogen and oxygen bidentate and the complex was in the form of a square planar and then we did this complex with a compound (tertiary phosphines) [ph2p(CH2)n pph2] (n = 1, 2, 3) and its coordinated was a bidentate chelating. The reason we chose tertiary di phosphine is because it is easy to bind to platinum and forms a stable compound due to reverse donation [11] in addition to that (tertiary diphosphines) has efficacy against the growth of cancer cells [12]. The aim of this research is to provide a study that is useful in the field of chemistry and medicine.
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CHEMICAL PROBLEMS 2024 no. 4 (22)
2. Experimental part
2.1. Materials Employed. All chemicals utilized were procured from Fluka, and Aldrich Companies.
2.2. Used Instruments. Infrared spectra of the synthesized compounds were recorded at the Chemistry Department of the College of Sciences at the University of Tikrit using an FTIR-8400S instrument provided by SHIMADZU. The spectra were recorded in the range of 4000-400 cm-1 using KBr pellets. (1H, 13C-NMR) Nuclear Magnetic Resonance spectra were acquired using a Bruker Spectrometer (500 MHz), respectively, in d6-DMSO solvent at the University of Tehran in Iran. The measurements were conducted using an SMP10 Automatic Melting Point apparatus from the British company STUART. The Magnetic susceptibility measurements of certain solid metal complexes were carried out at the laboratory temperature using a Sherwood Scientific instrument in the Chemistry Department of the College of Sciences at the University of Tikrit. The Faraday method was employed for these measurements.
2.3. Synthesis of ethylnyl 2-((5-chloroquinolin-8-yl)oxy)acetate compound (A1) [13]. Potassium carbonate (0.01 mol, 1.38 g) was added to quinoline (0.01 mol, 1.79 g) dissolved in dimethylformamide (15 mL) and stirred for 15 minutes. Ethyl chloroacetate (0.01 mol, 1.07 mL) was then added to the mixture. The reaction mixture was stirred for 4 hours at a temperature range of 40-50 °C. After cooling the solution, distilled water (50 mL) was added with continuous stirring. The resulting precipitate was filtered, and the crystals were recrystallized using absolute ethanol. The obtained product was a white solid with a melting point ranging from 90 to 96 °C, and the yield was 89%.
2.4. Synthesis of Compound 2-((5-Chloroquinolin-8-yl)oxy)acetohydrazide (A2)
[14, 15]. Compound A1 (0.01 mol, 2.65 g) was dissolved in ethanol (20 mL), and hydrazine hydrate (0.02 mol, 1 mL) was added dropwise with stirring for 15 minutes. The reaction mixture was allowed to react for 4 hours at a temperature range of 70-80 °C and then left at room temperature24 hours. the resulting precipitate was filtered, dried, and recrystallized using absolute ethanol. The reaction completion was confirmed by measuring through TLC (Thin-Layer Chromatography). The product obtained was a white solid with a melting point ranging from 212 to 214 °C, and the yield was 82%.
2.5. Synthesis of (2-((5-Chloroquinolin-8-yl)oxy)acetohydrazide di choro Platinum (II) (A3). Compound A2 (0.002 mol) was dissolved in methanol (15 mL), and the K2PtCl4 (0.002mol) soluble in water (10ml) was added. The mixture was stirred for 2 hours and then left at room temperature 24 hours. The precipitate was filtered, dried, and recrystallized using absolute ethanol. The progress of the reaction was confirmed by monitoring physical properties such as color and melting point. Table 1 displays the physical properties of the prepared complexes.
2.6. Synthesis of Pt(II)complexes with tertiary di Phosphines (A4-A6)
A solution of tertiary phosphines (dppm, dppe, dppp) (0.002mol)dissolved in CHCh (15 ml) was added to a hot suspension of (A3)(0.002mol) in CHCh (15 ml) with stirring and refluxed for 2 h. precipitate was filtered, dried .The progress of the reaction was confirmed by monitoring physical properties such as color and melting point (Table 1).
No Complex Yield M.P/ C° Color Cond.Am (n_1.cm2.mol"1) Magnetic moment Veff (B.M)
A3 [PtA2Cl2] 90% 230-232 yellow 32.69 0.00000029
A4 [PtA2dppm] 84% 187-189 pale- orange 11.24 0
a5 [PtA2dppe] 87% 176-178 pale- yellow 14.07 0.00000025
A6 [PtA2dppp] 82% 180- 182 white-yellow 10.48 0
Table 1. Some physical properties, conductivity and magnetic measurements of complexes (A3-A6)
2.7. Measurement of Biological Activity [16-18]
Biological activity evaluation was performed through the Agar-well diffusion method. This involved inoculating the bacterial cultures across the entire growth medium using a cotton swab. Wells were then created in the agar medium employing a sterile puncture tool with a diameter of 6 mm. Subsequently, 100 microliters of each compound were placed within these wells on separate culture plates, each harboring a distinct bacterial strain. This
process was replicated across all prepared solutions, encompassing their respective concentrations and targeted bacterial strains under study. The antibacterial activity assessment was conducted on two distinct bacterial types: the gram-positive Staphylococcus and the gram-negative Escherichia coli. To ensure the effectiveness of the test, both bacterial species were initially re-cultivated and subsequently incubated in a controlled laboratory environment at 37°C for duration of 18-24 hours.
3. Results and discussion
In this study, many compounds and complexes were prepared, as shown in Scheme (1).
Scheme 1. Prepared compounds and complexes (Ai-A6)
3.1. The electronic spectra of platinum complexes (A4-A6)
The low-spin platinum (II) complexes have a quadrilateral geometric arrangement and take the shape of a square planar. The low-spin
Aig1 -Big1 Aig1 -Aig1 Aig1 —1Eu*
Electron spectrometry of the prepared
state is preferred with ligands containing donor atoms such as (S, O, and N). These complexes possess the properties of a magnetic dia, as they the electronic spectrum of these complexes shows three permitted transitions:
(23255 - 27027) cm-1 (14694 - 16551) cm-1 (25641 - 31645) cm-1
platinum complexes (Figures 1-3) showed
absorption bands in the region enclosed between corresponds to the arrangement of the platinum
the highest peak and the lowest peak in the table (II) pt complexes and forms a square planar as
that belongs to the transitions (A1g1 ^ B1g1) shown in Table 2. and that the location of these bands
Table 2. The electronic spectra for the prepared complexes
No Compound 1 max(nm) Waveno. (cm-1) Transition Type Geometric shape
780 12820 A1g—Eg
430 23255 * n—>n
A4 [PtA2dppm] 368 27173 TC—TC square planar
312 32051 * n—n
780 12820 A1g—Eg
430 23255 n—n
A5 [PtA2dppe] 312 32051 * n—n square planar
296 33783 * n—n
780 12820 A1g—Eg
A6 [PtA2dppp] 430 23255 n—n square planar
312 32051 * n—n
cm-1) (A4- À6)
Fig. 1. The electronic spectra of complex [Pt(A2)dppm]
Fig. 2. The electronic spectra of complex [Pt(A2)dppe]
Fig. 3. The electronic spectra of complex [Pt(A2)dppp]
3.2. Characterization of Compounds (A1-A6) by FT-IR Spectroscopy
The infrared spectra of various compounds and complexes are presented in this study, shedding light on their structural characteristics and interactions. Infrared spectroscopy, a powerful analytical technique, provides valuable insights into the chemical composition of these substances by identifying the specific vibrational modes of their constituent functional groups. Compound A1 exhibits distinctive absorption bands in its infrared spectrum. A strong band at 1766 cm1 corresponds to the carbonyl group (C=O), while two bands at 1589 and 1504 cm1 are attributed to the aromatic C=C bonds. Another band at 1303-1103 cm1 is associated with the C-O-C sym, asym group, and a band at 786 cm~i arises from the C-Cl group. Compound A2 (Figure 4) reveals distinct bands in its infrared spectrum. Bands at 3444 and 3321 cm~i correspond to the NH2 group, while a band at 3032 cm~i indicates the presence of the NH group. The amide carbonyl group (C=O) is marked by a band at 1747cm~i, and bands at 1589 relate to aromatic C=C bonds. Additionally, a band at 1303-1103 cm~i signifies the C-O-C sym, asym group, and a band at 821 cm~i suggests the presence of C-
Cl bonds. Complex A3 (Figure 5) displays changes in its infrared spectrum, reflecting interactions between the metal and specific functional groups. A decrease in frequency at (3321) cm~i is indicative of NH2 group-metal bonding, while a reduction in frequency at 1800 cm~i points to metal-C=O amide bonding. Notably, a band at 3600 cm~i corresponds to water molecules coordinated with the metal, while other bands remain unchanged. New bands were noticed when examining the phosphonate complexes' infrared spectrum (Figures 6 and 7). Another band at a frequency of (1419-1436) cm-1 assigned to the (P-Ph) bond, and aband at frequencies (3321) cm-1 associated with the (NH2) group. Additionally, a band at (3107) cm-1 was identified as originating from the (Nh) group, a band at (1766-1800) cm-1 was linked to the (C=O) bond, and a band at (1589-1666) cm-1 was attributed to the (C=C) bond. Furthermore, a band at (1303-1103) cm-1 corresponded to the (C- O-C) bond, and a band at (937-941) cm-1 was associated with the (Pt-O) bond, while a band at (532-505) cm-1 corresponded to the (Pt-N) bond and a band at (493-478) cm-1 corresponded to the (Pt-P) bond.
These data (Table 3) closely aligned with the literature findings.
Table 3. IR Absorption Results (cm- ) for compounds and complexes (A1-A6
No. vNH2 vNH vC=O vC=C Arom. vP-Ph v(C-O-C) sym / asym vPt-O vPt-N vPt-P
A1 — — 1766 1589 --- 1303-1103 — —
A2 3444, 3321 3032 1747 1674 --- 1303-1103 — —
A3 3322 3107 1800 1678 --- 1303-1107 941 532 -
A4 3321 3107 1797 1678 1419 1303-1107 941 505 482
A5 3321 3199 1766 1666 1435 1303-1103 937 505 478
A6 3321 3086 1762 1674 1436 1307-1099 941 509 493
Fig. 4. FT-IR spectrum of compound (A2)
i \y J ]l t 1 u ♦ Ï l/ïll fi г hïf Я Ii
: 1 с Г г» i i
: t * 1 1 i с 1 S i
: я 1 i :
j i Í а Ii!
!
j fu
: Ml
~m * к 1
о. I.V. ,Ло .Л. '"'"« ~ "" ___
Fig. 5. FT -IR spectmm of cor nplex (A3)
"г ! TYl M в г
: г ■ i ä l и i V! f г V iL ht * ' л а V\ !■
i 1 «
j «V 9 1 в
i
» t
I
:
; И
:
flfl нал ЗЛ ЛО jooo i ai **
Fig. б. FT-IR spectrum of complex (A4)
3.3. Characterization 1H-13C- NMR Spectroscopy and of (A2) and 31P-NMR Spectroscopy of (A5)
1H-NMR spectrum of (A2) confirm the suggested structure displays a singlet for tow protons at 5=4.39 ppm assigned to the NH2 group labeled (Ha) (S, 2H). Another singlet showed at 5=4.39 ppm assigned to the methylene protons, which labeled as Hb (S, 2H). Moreover, the protons of the aromatic
rings display a doublet at 5=7.23 ppm attributed to Hd with a coupling constant of (3JH-H=8.40 Hz). A multiple at 5H (7.71) ppm with an integration value of two protons assigned to Hg and He respectively. The Hf proton showed as a doublet at 58.54 ppm with a coupling constant of (3Jhh = 8.90Hz). The integration value of Hf is one proton. Another doublet showed at 5=9.00 ppm which represents Hh proton.
Fig. 8. 'H-NMR spectrum of (A2)
fl 9 f V 1 >i|l NM, 1 ——
;C y ttoooa
> » '"i mm 1 1 Ot wm —
S-.Ä-,irn lU-¡5-rs---T5
Fig. 9.13C-NMR spectrum of (A2)
13/
C-NMR spectrum of (A2) confirms the suggested structure. The spectrum showed the methylene carbon labeled Cb at 5=68.43 ppm. The carbons of the aromatic rings appear at 5=
(111.78- 153.84) ppm which attributed to Cd, Cf, Cj, Cg, Ce, Ch, Ck, Ci and Cc. Finally, the carbonyl carbon which is labeled as Ca display at 5=166.98 ppm, as shown in Figure 9.
Fig. 10. 31P-{ 1H} NMR spectrum of (A5)
The 31P-NMR spectrum of the complex (A5) [PT(M-L) dppeK2] confirms the proposed structure, as the spectrum showed a signal at 5=(48.24, 42.63) ppm attributed to the phosphorus (dppe) present in the complex, as shown in Figure 10.
3.4. Magnetic Measurements of Prepared Complexes (A3-A6)
The magnetic susceptibility of the prepared platinum complexes was calculated at a temperature of 25°C. The diamagnetic corrections (D) for the atoms in the organic molecules, metal ions, and non-organic radicals were applied using Pascal's constants for the constituent atoms of the prepared complexes. D (in cm3.molecule-1) is equal to the sum of the number of ions or atoms of the element multiplied by the Pascal's constant. The calculated values of the effective magnetic moment (^eff) for the prepared complexes were determined through magnetic measurements. The magnetic measurements of the prepared platinum (II) complexes (A3-A5) revealed values ranging from (0.00000029, 0.00000025,0) B.M. These results suggest that the metallic (II) ion exhibits tetra coordination with a high-spin square planar configuration.
3.5. Evaluation of the Biological Activity of Some Prepared Compounds (A2-
A5)
The study included the use of two types of bacteria that were purely isolated and correctly diagnosed. The bacteria (Staphylococcus aureus and Escherichia coli) were chosen because of their vital importance in the field of medicine, which in turn affects human health, causing many different diseases. The susceptibility test method was conducted using the simple diffusion method in the culture medium agar diffusion method. The results indicate that the prepared compounds could inhibit the growth of both Gram-positive and Gram-negative bacteria to varying degrees.
It was noted that the effectiveness of inhibition is directly proportional to the concentration of the inhibitor, that is, it increases with increasing inhibitor concentration, and that the concentration (mg/ml 100) is the best concentration to obtain the highest inhibition. The compound (A5) showed a high inhibition of 27 mm against staphylococcal bacteria, While compound (A3) showed a high inhibition of 26 mm against Escherichia coli bacteria, it is possible that the inhibition of the growth of the two types of bacteria used in this study can be attributed to the presence of active groups in the prepared compounds, as these groups interfere with the cell division mechanism and thus work to stop bacterial growth and that their effectiveness.
These aggregates differ in their effect on the cell wall membrane barrier (Table 4).
Table 4. Biological effectiveness of prepared compounds, complexes and control parameters (in _mm)_
Comp. No. Staphylococcus Conc. (mg/ml) Escherichia coli Conc. (mg/ml)
25 50 100 25 50 100
A2 10 12 13 11 13 15
A3 14 15 18 13 15 26
A4 16 17 24 12 15 22
A5 18 22 27 14 16 24
Ciprofloxacin 13 15 20 19 25 36
Blank disk 0 0 0 0 0 0
3.6. Study of Molecular Docking [19-21] The molecular docking of some prepared compounds (A2, A3, A5,) on one line, which is Pseudomonas aeruginosa bacteria, was studied using MOE (2014) program, where the energy reduction process of the vehicles under study was completed in order to obtain the most stable vacuum form (least obstructive energy), then the composition of Pseudomonas aeruginosa bacteria was downloaded from the
World Bank Protein Bank website (6R3X receptor), and a personal calculator was used. The values of the binding energies of the compounds were calculated as in Table 5. The study of molecular fusion of prepared organic derivatives gave the number and types of bonds through which these prepared derivatives are connected with amino acid residues found in the active site by forming a number of bonds [22].
Table 5. Values of binding energy, hydrogen bond lengths and amino acid effect between prepared compounds and receptor (6R3X) One line of Pseudomonas aeruginosa bacteria Pseudomonas
aeruginosa.
■a a Correlati Hydrogen bond Other amino acids affected by van der Waals and other forces Number of aminoacids affected
s o p S 0 C on Energy Docking Score RMDS Number of hydroge n bonds Associated amino acids Hydrogen bond length
A2 -6.286 2.27 3 Arg.331 Thy.239 Tyr.409 2.35(A) 1.90(A) 2.04(A) Val.333, Arg.329,489Ser.294, Lys.297 Ala.488,Asn.69 Gly.293, Asn.351 Thy.(326,498,503,532,407,4 87) 9
A3 -7.389 2.38 3 Tyr.223 Arg.331 Arg489 1.89(A) 2.08(A) 2.40(A) Ser.249,Arg.489Val.333,Asn.351 Tyr(407, 487.409.328,498) 18
A5 -6.633 4.19 3 Arg.489 Arg.335 Arg.331 2.28(A) 2.04(A) 2.00(A) Val.333,Glu.500Asn.(501,351) Thr.487,Ala.488Asp.332,Phe.533 Ser.294,Tyr.(532,409,407,50 3,487,) 14
The study showed that the compound (A2) reacts with the amino acid residues that reside in the active site by forming two types of bonds, namely three hydrogen bonds, the first linking the amino acid residues, Arg.331
located in the active site with the electronic pair of the oxygen atom of the carbonyl group, and the second and third linking the amino acid residues Tyr.409 and Thy.239 located in the active site with the electronic pair of the
nitrogen atom hydrazide group. And a number of amino acids affected by van der Waals forces as in Table 5 above. Figure 11 shows the two-dimensional and three-dimensional
representation of the molecular anchoring results and the association between the prepared compound A2 and the 6R3X receptor.
Fig. 12. Interactions of A3 and receptor 6R3X
The study showed that the compound (A3) reacts with the amino acid residues that exist in the active site by forming two types of bonds, namely three hydrogen bonds, the first and the second linking the amino acid residue Arg.331 located in the active site with the electronic pair of the two nitrogen atoms of the hydrazide group associated with the metal, and the third links the residues of the amino acids Thr.329 located in the active site with the
electronic pair of the nitrogen atom associated with the metal, and a number of amino acids affected by the van der WSaals forces of as in Table 5 above. Figure 12 shows the two-dimensional and three-dimensional representation of the molecular anchoring results and the association between the prepared compound (A3) and the receptor (R3X6)) one line of Pseudomonas aeruginosa.
Fig. 13. Interactions ofA5 and receptor 6R3X
The study showed that the compound (A5) reacts with the amino acid residues that reside in the active site by forming two types of bonds, namely three hydrogen bonds, the first linking the amino acid residue Arg.489 located in the active site with the electron pair of the Arg.335 amino acid residue located in the active site with the electronic pair of the sulfamide group oxygen atom, and the third linking the amino acid residues. Arg.331 is located in the active position with the electron pair of an oxygen atom of the hydroxylic acid carboxylic acid
group, and a Pi-Alkyl type bond residue of the amino acid Val.333 which resides in active situ with the electron pairs of the furan aromatic ring, and a number of amino acids affected by van der Waals forces as in Table 5 above and Figure 13 shows the two-dimensional and three-dimensional representation of the molecular anchoring results and the association between the prepared compound (A5) and the receptor (6R3X) One line of Pseudomonas aeruginosa Pseudomonas aeruginosa.
4. Conclusions
Compound (A2) readily forms complexes, especially with platinum salt. The prepared compounds and complexes exhibited high stability and strength, maintaining their structure, color, and melting point even under varying laboratory temperatures between winter and summer. The biological study revealed that most of the prepared compounds and
complexes possess antibacterial activity and the ability to inhibit bacterial growth. These compounds exhibited higher biological efficacy compared to their parent compounds, which is of significant importance since the parent compounds are used as pharmaceuticals in the medical field.
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PLATiNiN (II) QARI§IQ LiQANDLI KOMPLEKSLERiNiN 2-((5-XLOROXiNOLiN-8-iL) OKSi) ASETOHiDRAZiD УЭ U£LU DiFOSFiNL9RL9 SiNTEZi, XARAKTERiSTiKASI, MOLEKULYAR DOKINQi УЭ BiOLOJi AKTiVLiYiNiN
OYRONiLMaSi
9fraa Sabir $ihab
Kimya Bolmssi/ Tsmiz Elmlsr ugun Tshsil Kolleci/ Tikrit Universiteti, iraq e-mail: [email protected] https://orcid.org/0000-0003-1006-5919
Xulasa: Bu tadqiqat muxtalif uzvi birla§malarin hazirlanmasina hasr olunmu§dur. Etilnil 2-((5-xlorokinolin-8-il)oksi)asetat birla§masi (Ai) kalium karbonatin xinolin va etilxloroasetata alava edilmasi ila sintez edilmi§dir. 2-((5-Xlorokinolin-8-il)oksi) asetohidrazid (A2) birla§masi isa (A1) hidrazidla reaksiya naticasinda alinmi§dir. Halledici kimi etanoldan istifada etmakla ekvimolyar miqdarda (A2) birla§masinin platin duzunun mahlulu ila reaksiya naticasinda (A3) kompleksi alda edilmi§dir. Fosfin komplekslari, (A3) kompleksinin muxtalif fosfinlarla reaksiyandan va halledici kimi etanoldan istifada etmakla hazirlanmi§dir. Sintez edilmi§ birla§malar va komplekslar Furye-infraqirmizi (FT-IR) spektroskopiyasi, Uv-Visual spektri va Nuva Maqnit Rezonansi (31P, 1H va 13C-NMR) spektroskopik usullardan istifada etmakla xarakteriza edilmi§dir. Bundan alava, onlarin arima noqtalari, tamizliyi, molyar ke?iriciliyi va maqnit hassasligi muayyanla§dirilmi§dir. Sintez edilmi§ bazi birla§malarin va komplekslarin antibiotiklara qar§i davamli iki bakteriya §tamminin, yani qram-musbat Stafilokok va qram-manfi Escherichia coli-nin boyumasina tasiri oyranilmi§dir. Tsiprofloksasin nazarat antibiotiki kimi istifada edilmi§dir. Sintez edilmi§ birla§malarin bazilari sinaqdan ke9irilmi§ bakteriya §tammlarina qar§i ahamiyyatli inhibitor tasiri gostarmi§dir. A?ar soztar: Xlorokinolin-8-ol, efir, u9lu difosfinlar, komplekslar, bioloji aktivlik.
СИНТЕЗ, ХАРАКТЕРИСТИКА, ИЗУЧЕНИЕ МОЛЕКУЛЯРНОГО ДОКИНГА И БИОЛОГИЧЕСКОЙ АКТИВНОСТИ СМЕШАННЫХ ЛИГАНДОВ КОМПЛЕКСОВ ПЛАТИНЫ (II) С 2-((5-ХЛОРХИНОЛИН-8-ИЛ) ОКСИ) АЦЕТОГИДРАЗИДОМ И
ТРЕТИЧНЫМИ ДИФОСФИНАМИ
Афраа Сабир Шихаб
Кафедра химии, Университет Тикрита, Ирак e-mail: [email protected] https://orcid. org/0000-0003-1006-5919
Резюме: Это исследование включает в себя получение различных органических соединений. Соединение этилнил 2-((5-хлорхинолин-8-ил)окси)ацетата (A1) было синтезировано путем добавления карбоната калия к хинолину и этилхлорацетату. 2-((5-хлорхинолин-8-ил)окси)ацетогидразид (A2) был получен путем взаимодействия соединения (A1) с гидразидом. Комплекс (A3) был получен путем взаимодействия эквимолярных количеств соединения (A2) с раствором соли платины с использованием этанола в качестве растворителя. Фосфинатные комплексы были получены путем взаимодействия равных молей комплекса (A3) с различными используемыми фосфинами и использованием этанола в качестве растворителя. Синтезированные соединения и комплексы были охарактеризованы с использованием различных спектроскопических методов, включая Фурье-ИК-спектроскопию (FT-IR), УФ-видимый спектр и ядерный магнитный резонанс (31P, 1H и 13C-ЯМР). Кроме того, были определены их температуры плавления, чистота, молярная
проводимость и магнитная восприимчивость. Было изучено влияние некоторых полученных соединений и комплексов на рост двух устойчивых к антибиотикам бактериальных штаммов, а именно грамположительного Staphylococcus и грамотрицательного Escherichia coli. Ципрофлоксацин использовался в качестве контрольного антибиотика. Некоторые из синтезированных соединений проявили значительную ингибирующую активность против тестируемых бактериальных штаммов.
Ключевые слова: хлорхинолин-8-ол, эфир, третичные дифосфины, комплексы, биологическая активность.
