Synlett 2012; 23(19): 2735-2744
DOI: 10.1055/s-0032-1317192
account
© Georg Thieme Verlag Stuttgart · New York

Domino Twofold Heck/6π-Electrocyclization Reactions of 1,2-Dihaloalkenes

Munawar Hussain
a   Institute of Chemistry, University of Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany   Fax: +49(381)4986412   Email: peter.langer@uni-rostock.de
b   Department of Chemistry, Umeå University, 90187 Umeå, Sweden
,
Tran Van Sung
c   Vietnamese Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
,
Peter Langer*
a   Institute of Chemistry, University of Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany   Fax: +49(381)4986412   Email: peter.langer@uni-rostock.de
d   Leibniz Institute of Catalysis e.V. at the University of Rostock, Albert-Einstein-Str. 29a, 18059 Rostock, Germany
› Author Affiliations
Further Information

Publication History

Received: 13 June 2012

Accepted after revision: 15 August 2012

Publication Date:
31 October 2012 (online)


Abstract

Domino twofold Heck/6π-electrocyclization reactions of 1,2-dihaloalkenes allow for a convenient synthesis of benzene derivatives. In recent years, this strategy has been applied to various 1,2-dihalogenated carbocyclic alkenes and heterocycles, and a variety of benzo-fused ring systems have been prepared. The electro­cyclization reactions proceed well for five-membered, but not for six-membered heterocycles.

1 Introduction

2 Carbocyclic Substrates

3 Heterocyclic Substrates

3.1 Thiophenes

3.2 Pyrroles

3.3 Imidazoles

3.4 Furans

3.5 Benzothiophenes

3.6 Indoles

3.7 Benzofurans

3.8 Pyridines

3.9 Pyrazines

3.10 Quinoxalines

4 Conclusions