Synthesis of substituted benzoxazinylthieno[2,3-b]pyridines by the reaction of (3-cyanopyridin-2-ylthio)acetic acids or their amides with o-aminophenyl(diphenyl)carbinol
作者:E. A. Kaigorodova、L. D. Konyushkin、A. A. Osipova、E. A. Gavrilova、E. V. Gromachevskaya、G. D. Krapivin
DOI:10.1007/s11172-005-0208-5
日期:2004.12
A general method for the synthesis of 3-amino-2-(4,4-diphenyl-4H-3,1-benzoxazin-2-yl)thieno[2,3-b]pyridines was proposed. The method involves reactions of (3-cyanopyridin-2-ylthio)acetic acids or their amides with o-aminophenyl(diphenyl)carbinol in nitromethane in the presence of perchloric acid followed by neutralization of the resulting salts.