方酰胺催化的不对称串联反应合成螺环氧吲哚衍生物研究进展

Chiral spirooxindoles have captured huge attention from researchers in the area of organic chemistry and medicinal chemistry owing to their prevalence in various alkaloid natural products and pharmacologically active agents. In recent year, chiral bifunctional squaramide-catalyzed asymmetric cascade reaction of oxindoles or oxindole derivatives has become an efficient synthetic method for the construction of chiral spirooxindoes. In this review, the remarkable progress and advances in bifunctional squaramide-catalyzed asymmetric cascade reactions for the synthesis of spirooxindole derivatives from 2015 are summarized and discussed based on the different types of catalytic reactions.