The formal [4+3] cycloaddition between donor-acceptor cyclobutanes and nitrones.

Authors

Andrew C Stevens
Cory Palmer
Brian L Pagenkopf

Document Type

Article

Publication Date

2-22-2011

Journal

Organic letters

Volume

13

Issue

6

First Page

1528

Last Page

1531

URL with Digital Object Identifier

10.1021/ol200220d

Abstract

The formal [4+3] cycloaddition of 2-alkoxy-1,1-dicarboxylate activated donor-acceptor cyclobutanes with nitrones is disclosed. The reaction forms structurally unique oxazepines in moderate to high yield with a wide scope of nitrones. In most cases either a diastereomeric mixture or a single diastereomer may be formed, depending on the reaction conditions.