One-Pot Asymmetric Synthesis of Substituted Tetrahydrofurans<i>via</i>a Multicatalytic Benzoin/Michael/Acetalization Cascade
作者:Gu He、Fengbo Wu、Wei Huang、Rui Zhou、Liang Ouyang、Bo Han
DOI:10.1002/adsc.201400172
日期:2014.7.7
A sequential benzoin/Michael/acetalization tandem reaction catalyzed by NHC and amine together has been developed to assemble aromatic aldehydes and enals into chiral tetrahydrofuran derivatives bearing multiple functional groups and stereogenic centers with high stereoselectivity of up to 95:5 dr and 96% ee. The high yield and stereocontrol of this process may be due to both acid‐promoted symmetrization
已开发出一种由NHC和胺共同催化的顺序安息香/迈克尔/缩醛化串联反应,可将芳族醛和烯醛组装成带有多个官能团和立体中心的手性四氢呋喃衍生物,其立体选择性高达95:5 dr和ee为96%。该过程的高收率和立体控制可能是由于酸促进了消旋酰基辅酶的对称化以及烯酮的亚胺离子活化。