Fused pyrimidines. IV. The reaction of 4-alkylthio-2-chloroquinazolines with alkylamines in dimethylformamide.
作者:HIDEKI MIKI、JUNJI YAMADA
DOI:10.1248/cpb.30.2313
日期:——
The reaction of 4-alkylthio-2-chloroquinazolines with alkylamines in dimethylformamide afforded 2, 4-bis (alkylthio)-, 2-alkylamino-4-alkylthio-, 4-alkylamino-2-chloro-, 4-alkylamino-2-alkylthio-, and 2, 4-bis (alkylamino) quinazolines. The relative easines of displacement of the chlorine and/or the alkylthio group in 4-alkylthio-2-chloroquinazolines depended on the bulkiness rather than the basicity of the alkylamine. A possible reaction mechanism is discussed.
4-烷硫基-2-氯喹唑啉与烷基胺在二甲基甲酰胺中的反应,生成2,4-双(烷硫基)-、2-烷基氨基-4-烷硫基-、4-烷基氨基-2-氯-、4-烷基氨基-2-烷硫基-以及2,4-双(烷基氨基)喹唑啉。在4-烷硫基-2-氯喹唑啉中,氯和/或烷硫基的取代难易程度取决于烷基胺的体积而非碱性。本文讨论了可能的反应机理。