highly diastereoselective direct Michael addition-isomerization sequence is presented for the efficient synthesis of Rauhut–Currier-type adducts. An unexpected α-addition of γ-butyrolactam onto the 3-acyl coumarin derivatives was observed rather than the γ-addition, which is more common. The adducts could further undergo hydrolysis/decarboxylation to generate the products which are equivalent to those
为有效合成Rauhut-Currier型加合物,提出了一种新颖的碱催化且高度非对映选择性的直接Michael加成异构序列。观察到在3-酰基
香豆素衍
生物上意外地将γ-丁内酰胺α-加成,而不是更普遍的γ-加成。加合物可以进一步进行
水解/脱羧以产生与通过将γ-丁内酰胺α加成到相应的
查耳酮上所获得的产物等同的产物。