Synthesis and transformations of 3-acetylpyridine-2(1H)-thiones
作者:V. K. Zav’yalova、A. A. Zubarev、V. P. Litvinov
DOI:10.1007/s11172-008-0197-2
日期:2008.7
Reactions of substituted 3-cyanopyridine-2(1H)-thiones with methyllithium gave 3-acetylpyridine-2(1H)-thiones. The best results were achieved by adding a solid-state thione to a solution of methyllithium in ether (thione: MeLi = 1: 3). The compounds obtained and their 3-pentanoyl analogs were used to synthesize a number of fused heterocyclic systems.
Synthesis and reactions of 3-acetyl-6-methyl-2-(methylthio)pyridine
作者:V. K. Zav’yalova、A. A. Zubarev、A. M. Shestopalov
DOI:10.1007/s11172-009-0265-2
日期:2009.9
A reaction of methyllithium with 3-cyano-6-methylpyridine-2(1 H)-thione followed by alkylation of the resulting 3-acetylpyridinethione, or a direct reaction of methyllithium with 3-cyano-6-methyl-2-(methylthio)pyridine, afforded 3-acetyl-6-methyl-2-(methylthio)pyridine. The ketone obtained was examined in bromination reactions under various conditions. Bromi-nation in methanol or chloroform, proceeding