Convergent Access to Polycyclic Cyclopentanoids from α,β-Unsaturated Acid Chlorides and Alkynes through a Reductive Coupling, Nazarov Cyclization Sequence
作者:Jason H. Chaplin、Kristal Jackson、Jonathan M. White、Bernard L. Flynn
DOI:10.1021/jo500040b
日期:2014.4.18
Reductivecoupling of α,β-unsaturatedacid chlorides A with alkynoyls B provides convergent access to Nazarov cyclization precursors, α-carboxy divinyl ketones C. Cyclization of C gives an intermediate oxyallyl cation intermediate D, which can be trapped with tethered arenes (Ar). The resultant products can be further cyclized through nucleophilic displacement of suitable leaving groups X by tethered