nitriles, which are selectively obtained in the traditional Pd(0)-catalyzed reaction, were observed. The use of phosphate as the leaving group was crucial to achieve complete regioselectivity of the ambident cyanide species as the N-terminus nucleophile. The reaction was applicable to a series of aromatic-, heteroaromatic-, vinylic-, and aliphatic-substituted allylic phosphates. The mechanistic studies
在催化量的Pd(OAc)2存在下,烯丙基
磷酸酯与三甲基甲
硅烷基
氰化物(TMSCN)反应,仅得到相应的烯丙基异腈。没有观察到在传统的Pd(0)催化反应中选择性获得的
烯丙基腈。使用
磷酸盐作为离去基团对于实现作为N-末端亲核试剂的环境性
氰化物物种的完全区域选择性至关重要。该反应适用于一系列芳族,杂芳族,
乙烯基和脂族取代的烯丙基
磷酸酯。机理研究表明,烯丙基
异氰酸酯化是由Pd(II)物种而不是Pd(0)催化的。