作者:A. Z. M. Shaifullah Chowdhury、Yasuyuki Shibata、Masatoshi Morita、Kunimitsu Kaya、Kazuhisa Hiratani
DOI:10.1002/jhet.5570380522
日期:2001.9
isothiocyanate, isocyanate or dithioketal reagent furnished pteridines 3,4 in good yield. Thioxo compound 3a was chlorinated, methylated and subsequently displaced by amines. A simple one-step synthesis of heterocondensed pteridines 8–13 by reaction of 2-aminopyrazine with various imino thioacetals was described 8–13.