Synthesis 2004(7): 999-1002  
DOI: 10.1055/s-2004-822326
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Novel Route to Polyfluorinated Alka-2E,4E-dienes

Yanchang Shen*, Guoping Wang
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, P. R. of China
Fax: +86(21)64166128; e-Mail: shenyc@mail.sioc.ac.cn;
Further Information

Publication History

Received 14 January 2004
Publication Date:
02 April 2004 (online)

Abstract

Treatment of (Z)-α-Fluoro-β-trifluoromethylvinylstannanes 3 with n-butyllithium gave tetrafluoropropene anion 4, which was reacted with α,β-unsaturated aldehydes affording 6. With or without isolation of 6, DAST was added and reacted with 6 to give polyfluorinated alka-2E,4E isomers, exclusively. It is noteworthy that the migration of the double bond occurred only at the non-fluorine-containing one.