64858-90-8Relevant articles and documents
Reshaping the active pocket of esterase Est816 for resolution of economically important racemates
Liu, Xiaolong,Zhao, Meng,Fan, Xinjiong,Fu, Yao
, p. 6126 - 6133 (2021/09/28)
Bacterial esterases are potential biocatalysts for the production of optically pure compounds. However, the substrate promiscuity and chiral selectivity of esterases usually have a negative correlation, which limits their commercial value. Herein, an efficient and versatile esterase (Est816) was identified as a promising catalyst for the hydrolysis of a wide range of economically important substrates with low enantioselectivity. We rationally designed several variants with up to 11-fold increased catalytic efficiency towards ethyl 2-arylpropionates, mostly retaining the initial substrate scope and enantioselectivity. These variants provided a dramatic increase in efficiency for biocatalytic applications. Based on the best variant Est816-M1, several variants with higher or inverted enantioselectivity were designed through careful analysis of the structural information and molecular docking. Two stereoselectively complementary mutants, Est816-M3 and Est816-M4, successfully overcame and even reversed the low enantioselectivity, and several 2-arylpropionic acid derivatives with highEvalues were obtained. Our results offer potential industrial biocatalysts for the preparation of structurally diverse chiral carboxylic acids and further lay the foundation for improving the catalytic efficiency and enantioselectivity of esterases.
Carbonic anhydrase inhibitory potential of 1,2,4-triazole-3-thione derivatives of flurbiprofen, ibuprofen and 4-tert-butylbenzoic hydrazide: Design, synthesis, characterization, biochemical evaluation, molecular docking and dynamic simulation studies
Abbas, Saghir,Abbas, Syed M.,Ali, Saqib,Hameed, Shahid,Iqbal, Jamshed,Munawar, Khurram S.,Shaheen, Farzana,Tahir, Muhammad N.,Ur Rahman, Shafiq,Zaib, Sumera
, p. 298 - 310 (2019/07/12)
Background: The over-expression of the carbonic anhydrases results in some specific carcinomas including pancreatic, gastric and brain tumor. Tumors are distinguished under hypoxic conditions and various investigations are being carried out to target the known hypoxic areas of the tumors to increase the sensitivity towards standard therapeutic treatment. Objective: Herein, we have designed and synthesized some biologically important esters, hydrazides, thiocarbamates, 1,2,4-triazole-3-thiones and Schiff bases. The purpose of the research was to evaluate the derivative against carbonic anhydrase and to assess the toxicity of the same compounds. Method: The structures of all the compounds were characterized by FT-IR, mass spectrometry, elemental analysis, 1H and 13C NMR spectroscopy. The synthetic derivatives were screened for their inhibitory potential against carbonic anhydrase II by in vitro assay. Double reciprocal plots for inhibition kinetics of the potent compounds were constructed and mode of inhibition was determined. Furthermore, to check the cytotoxicity, these derivatives were tested against human breast adenocarcinoma by MTT method. Results: X-ray diffraction analysis of the compounds 10, 14 and 15 showed that they did not have any φ-φ or C-H…φ interactions. The experimental results were validated by molecular docking and dynamic simulations of the potent compounds in the active pocket of enzyme. Important binding interactions of potent compounds with the key residues in the active site of the carbonic anhydrase enzyme were revealed. Drug likeness profile of the derivatives was evaluated to determine the physicochemical properties. Conclusion: The proposed synthetic approach provides a suitable platform for the generation of a new library of compounds which could potentially be employed in the future testing and optimization of inhibitor potencies.
Preparation method of flurbiprofen and preparation method of flurbiprofen axetil
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Paragraph 0007; 0029; 0044, (2018/10/19)
The invention relates to the field of pharmaceutical chemical synthesis, in particular to a preparation method of flurbiprofen and a preparation method of flurbiprofen axetil. The preparation method of the flurbiprofen comprises the steps of carrying out a Grignard reaction by using 4-bromine-2-fluorine biphenyl as a raw material, carrying out a coupling reaction, and acidizing to obtain the flurbiprofen; the yield is 90%, and the purity is 99.5%; then, the flurbiprofen axetil is prepared by using the flurbiprofen, obtained by the method, as a raw material, the yield reaches up to 90%, and thepurity reaches up to 99.5%. The preparation methods are high in quality controllability and industrial reproducibility.
