Synthesis of Cytosine Derivatives and Study of their Alkylation under Mild Conditions
作者:Dilip R. Birari、Maruti G. Ghagare、Muddassar A. Kazi、Sandeep M. Bagul、Bhausaheb K. Ghotekar、Raghunath B. Toche、Madhukar N. Jachak
DOI:10.1080/00304940903324390
日期:2009.11.25
towards the synthesis of cytosine derivatives. Several pyrimidine derivatives have recently emerged as the integral backbone of calcium channel blockers, antihypertensive agents and antagonists.10–14 We previously reported the synthesis of 4-aryl/4-aminopyrimidines,15, 16 fused pyrimidines17 and pyrazolo-[3,4-b]pyridines.18 Heterocycles such as pyrazoles,19–22 pyrimidines23–26 and 1,2,4 triazolo-[1
Searching for New Leads for Tuberculosis: Design, Synthesis, and Biological Evaluation of Novel 2-Quinolin-4-yloxyacetamides
作者:Eleni Pitta、Maciej K. Rogacki、Olga Balabon、Sophie Huss、Fraser Cunningham、Eva Maria Lopez-Roman、Jurgen Joossens、Koen Augustyns、Lluis Ballell、Robert H. Bates、Pieter Van der Veken
DOI:10.1021/acs.jmedchem.6b00245
日期:2016.7.28
In this study, a new series of more than 60 quinoline derivatives has been synthesized and evaluated against Mycobacterium tuberculosis (H37Rv). Apart from the SAR exploration around the initial hits, the optimization process focused on the improvement of the physicochemical properties, cytotoxicity, and metabolic stability of the series. The best compounds obtained exhibited MIC values in the low micromolar range, excellent intracellular antimycobacterial activity, and an improved physicochemical profile without cytotoxic effects. Further investigation revealed that the amide bond was the source for the poor blood stability observed, while some of the compounds exhibited hERG affinity. Compound 83 which contains a benzoxazole ring instead of the amide group was found to be a good alternative, with good blood stability and no hERG affinity, providing new opportunities for the series. Overall, the obtained results suggest that further optimization of solubility and microsomal stability of the series could provide a strong lead for a new anti-TB drug development program.
Synthesis of uracil derivatives and their alkylation: an approach to peptide non-nucleic acid monomers
作者:Madhukar N. Jachak、Dilip R. Birari、Raghunath B. Toche、Maruti G. Ghagare、Sandeep M. Bagul
DOI:10.1007/s00706-010-0280-x
日期:2010.4
A novel synthetic approach towards pyrazole-4-carboxamides using N-(3-(dimethylamino)-2-formylacryloyl)formamide
作者:Madhukar N. Jachak、Maruti G. Ghagare、Dilip R. Birari、Ramhari V. Rote、Muddassar A. Kazi、Sanjay M. Jachak、Raghunath B. Toche
DOI:10.1007/s00706-010-0290-8
日期:2010.5
A novel synthesis of pyrazole-4-carboxamides is reported. The reaction of N-(3-(dimethylamino)-2-formylacryloyl) formamide, an intermediate obtained by Vilsmeier-Haack formylation of acetonitrile, with hydrazine hydrate or monosubstituted hydrazines provides such compounds in good yields. This method has advantages over other methods for construction of such ring systems previously described in the literature.