for the synthesis of 2,3-substituted thiochromenes having a complex and easily transformable group at the stereogenic center has been developed via a tandem thio-Michael addition reaction of an in situ generated α,β-unsaturated aldehyde sugar derivative. The protocol is superior to reported protocols in that the carbohydrate-derived substituent at the stereogenic center of the thiochromene is versatile
通过原位生成的α,β-不饱和醛糖的串联
硫代-迈克尔加成反应,已开发出一种高效且高度立体选择性的策略,用于合成在立体生成中心具有复杂且易于转化的基团的2,3-取代的
硫杂
环戊烯衍
生物。该方案优于已报道的方案,因为在
硫代色烯的立体异构中心的
碳水化合物衍生的取代基是通用的,并且适合于进一步转化。