Asymmetric Organocatalytic Michael Addition–Cyclization Cascade of Cyclopentane-1,2-dione with Substituted α,β-Unsaturated Aldehydes
作者:Margus Lopp、Gert Preegel、Estelle Silm、Sandra Kaabel、Ivar Järving、Kari Rissanen
DOI:10.1055/s-0036-1588787
日期:2017.7
yields and excellent enantioselectivity. An asymmetric organocatalytic Michael addition–cyclization cascade reaction has been developed using cyclopentane-1,2-dione as a Michael donor and α,β-unsaturated aldehydes as Michael acceptors. Bicyclic hemiacetals were obtained in excellent yields and enantioselectivities. On the basis of the results, a one-pot reaction has been developed to obtain chiral 3-substituted
摘要 利用环戊烷-1,2-二酮作为迈克尔供体,α,β-不饱和醛作为迈克尔受体,开发了一种不对称的有机催化迈克尔加成环化级联反应。以优异的产率和对映选择性获得了双环半缩醛。根据该结果,已经开发了单釜反应以良好的收率和优异的对映选择性获得手性的3-取代的环戊烷-1,2-二酮和取代的二氢吡喃。 利用环戊烷-1,2-二酮作为迈克尔供体,α,β-不饱和醛作为迈克尔受体,开发了一种不对称的有机催化迈克尔加成环化级联反应。以优异的产率和对映选择性获得了双环半缩醛。根据该结果,已经开发了单釜反应以良好的收率和优异的对映选择性获得手性的3-取代的环戊烷-1,2-二酮和取代的二氢吡喃。