Synlett 2005(6): 0951-0954  
DOI: 10.1055/s-2005-864836
LETTER
© Georg Thieme Verlag Stuttgart · New York

Annulations via Dianions: Formation of Five-, Six- and Seven-Membered Rings

George A. Kraus*, Sarathy Kesavan
Department of Chemistry, Iowa State University, Ames, IA 50011, USA
e-Mail: gakraus@iastate.edu;
Further Information

Publication History

Received 18 January 2005
Publication Date:
23 March 2005 (online)

Abstract

Phosphonium salts bearing an electron-withdrawing group at the γ-position form dianions that react with bis-electrophiles to generate five-, six-, and seven- membered rings.