Addition-substitution reactions of 2-thio-3-chloroacrylamides with carbon, nitrogen, oxygen, sulfur and selenium nucleophiles
作者:Marie Kissane、Maureen Murphy、Elisabeth O'Brien、Jay Chopra、Linda Murphy、Stuart G. Collins、Simon E. Lawrence、Anita R. Maguire
DOI:10.1039/c0ob00805b
日期:——
conjugate addition of a range of carbon, nitrogen, oxygen, sulfur and selenium nucleophiles to the highly functionalised 2-thio-3-chloroacrylamides is described. The stereochemical and synthetic features of this transformation are discussed in detail. In most instances, the nucleophile replaces the chloro substituent with retention of stereochemistry. With the oxygen nucleophiles, a second addition can
描述了在高度官能化的2-硫-3-氯丙烯酰胺中合成一系列通用的碳,氮,氧,硫和硒亲核试剂。详细讨论了这种转化的立体化学和合成特征。在大多数情况下,亲核试剂会保留立体化学来取代氯取代基。对于氧亲核试剂,会发生第二次加成反应,产生乙缩醛,而对于氮亲核试剂,会在所得烯胺衍生物中发生E - Z异构现象。E / Z异构体的比例可以基于取代基和氧化水平来合理化。