The Synthesis and Microbiological Activity of 2-Mercapto-4-methoxypyridine-3-carbonitrile Derivatives
摘要:
Synthesis of 2-(3-cyano-4-methoxypyridin-2-ylthio)acetic acid derivatives, starting either from 2-bromo-4-methoxypyridine-3-carbonitrile or 2-mercapto-4-methoxypyridine-3-carbonitrile is reported. The obtained products could be transformed by intramolecular Thorpe-Ziegler cyclization to related thieno[2,3-b]pyridines. Diazotization of 3-amino-N-(4-chlorophenyl)-4-methoxythieno[2,3-b]pyridine-2-carboxamide resulted in formation of a suitable pyridothienotriazine derivative. Some of the prepared compounds demonstrated noticeable bacteriostatic or tuberculostatic activity.
Synthesis of 2-(3-cyano-4-methoxypyridin-2-ylthio)acetic acid derivatives, starting either from 2-bromo-4-methoxypyridine-3-carbonitrile or 2-mercapto-4-methoxypyridine-3-carbonitrile is reported. The obtained products could be transformed by intramolecular Thorpe-Ziegler cyclization to related thieno[2,3-b]pyridines. Diazotization of 3-amino-N-(4-chlorophenyl)-4-methoxythieno[2,3-b]pyridine-2-carboxamide resulted in formation of a suitable pyridothienotriazine derivative. Some of the prepared compounds demonstrated noticeable bacteriostatic or tuberculostatic activity.
Novel 3-Aminothieno[2,3-b]pyridine Synthesis via a Silicon-directed Anionic Cyclization
作者:Jason S. Parnes、Mercedes Delgado
DOI:10.3987/com-04-10119
日期:——
A novel strategy yielding a 3-aminothiophene is described herein. This specifically relies upon an α-thiomethylsilane directing deprotonation, thereafter cyclization of the resultant anion into a pendant nitrile forms thenecessary 3-aminothiophene ring.