Article ID Journal Published Year Pages File Type
4757306 Catalysis Today 2017 5 Pages PDF
Abstract

•The first example of using a chiral phosphine with a PP bond in asymmetric catalysis.•2 Chiral diphosphines were prepared from 1-(+)-neomenthyl-1,2-diphosphole.•The phosphines were utilized in Pd-catalyzed allylic substitution (ee = 25%).•[3 + 2] Organocatalytic cyclization of allenes with alkenes gave up to 68% ee.

A one-step diastereoselective synthesis of bulky P-chiral phosphines with a rigid bicyclic [2.2.1] structure was developed employing a cycloaddition reaction of 3,4,5-triphenyl-1-(+)-neomenthyl-1,2-diphosphole (1) and maleic acid derivatives. The catalytic activity and asymmetric induction for the prepared enantiopure tricyclic phosphines 2a and 3a were evaluated in Pd-catalyzed asymmetric allylic substitution and [3 + 2] organocatalytic cyclization of allenes with activated alkenes (ee = 68%). This is the first example of using a chiral phosphine with a PP bond as ligand in allylic alkylation and organocatalyst in a [3 + 2] annulation.

Graphical abstractDownload high-res image (138KB)Download full-size image

Related Topics
Physical Sciences and Engineering Chemical Engineering Catalysis
Authors
, , , ,