4-hydroxy-2-quinolones. 202*. Synthesis, chemical and biological properties of 4-hydroxy-6,7-dimethoxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid alkylamides
摘要:
In continuation of the search for potential analgesics amongst 4-hydroxyquinol-2-one derivatives we have proposed and carried out a preparative method of synthesis of 4-hydroxy-6,7-dimethoxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid alkylamides. It has been shown that bromination of 4-hydroxy-6,7-dimethoxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid allylamide using an equivalent of molecular bromine occurs with a conventional addition of the halogen to the allyl double bond and not with halocyclization. The results of the study of the analgesic properties of the compounds prepared are presented.
4-Cyano-6,7-dimethoxycarbostyrils with Solvent- and pH-Independent High Fluorescence Quantum Yields and Emission Maxima
作者:Appasaheb B. Ahvale、Hana Prokopcová、Jana Šefčovičová、Waltraud Steinschifter、Anna E. Täubl、Georg Uray、Wolfgang Stadlbauer
DOI:10.1002/ejoc.200700855
日期:2008.1
solvents in a narrow 430–440-nm window with almost constant quantumyield of 0.5. Equal excitation is possible in the broad double maximum between 385 and 410 nm yielding identical data between pH 1 and 11. These properties could lead to a broadly usable fluorescence standard. N-Alkylation with bromoacetate yields ester 13 in good yields. Reactive succinimidoyl (OSu) ester 15 was prepared by saponification
Scaffold morphing leading to evolution of 2,4-diaminoquinolines and aminopyrazolopyrimidines as inhibitors of the ATP synthesis pathway
作者:Subramanyam J. Tantry、Vikas Shinde、Gayathri Balakrishnan、Shankar D. Markad、Amit K. Gupta、Jyothi Bhat、Ashwini Narayan、Anandkumar Raichurkar、Lalit Kumar Jena、Sreevalli Sharma、Naveen Kumar、Robert Nanduri、Sowmya Bharath、Jitendar Reddy、Vijender Panduga、K. R. Prabhakar、Karthikeyan Kandaswamy、Parvinder Kaur、Neela Dinesh、Supreeth Guptha、Ramanatha Saralaya、Manoranjan Panda、Suresh Rudrapatna、Meenakshi Mallya、Harvey Rubin、Takahiro Yano、Khisi Mdluili、Christopher B. Cooper、V. Balasubramanian、Vasan K. Sambandamurthy、Vasanthi Ramachandran、Radha Shandil、Stefan Kavanagh、Shridhar Narayanan、Pravin Iyer、Kakoli Mukherjee、Vinayak P. Hosagrahara、Suresh Solapure、Shahul Hameed P、Sudha Ravishankar
DOI:10.1039/c5md00589b
日期:——
the treatment of multidrug-resistant tuberculosis has validated the ATP synthesis pathway and in particular ATP synthase as an attractive target. However, limitations associated with its use in the clinic and the drug–drug interactions with rifampicin have prompted research efforts towards identifying alternative ATP synthesis inhibitors with differentiated mechanisms of action. A biochemical assay
4-Chlorocarbostyrils , , , , with methoxy substituents in 6, 7, or 6,7-position react with potassium cyanide in a p-toluenesulfinate mediated reaction either to the highly fluorescent and stable 2-oxoquinoline-3,4-dicarbonitriles , , , or at slightly lower temperatures to 4-monocarbonitriles , , . 4-Chlorocarbostyril and lithium p-toluenesulfinate gave pure 4-toluenesulfonylquinolone , which reacted