Synthesis 2012; 44(19): 3071-3076
DOI: 10.1055/s-0032-1316736
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of New Tetrazol-5-ylalkenyl Derivatives of Ferrocene by Wittig Olefination

Jacek Grodner*
Institute of Industrial Organic Chemistry, 6 Annopol St., 03-236 Warsaw, Poland, Fax: +48(22)8116938   eMail: grodner@ipo.waw.pl
,
Tomasz Sałaciński
Institute of Industrial Organic Chemistry, 6 Annopol St., 03-236 Warsaw, Poland, Fax: +48(22)8116938   eMail: grodner@ipo.waw.pl
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Publikationsverlauf

Received: 20. Mai 2012

Accepted after revision: 04. Juli 2012

Publikationsdatum:
15. August 2012 (online)


Abstract

An effective and straightforward method has been developed for the synthesis of new olefinic derivatives of ferrocene that contain tetrazole rings. The method is based on condensation of 1-formyl-, 1,1′-diformyl-, or (E)-1-(2-formylvinyl)ferrocene with 1-substituted [(triphenylphosphoranylidene)methyl]-1H-tetrazoles, which are readily prepared by treatment of the corresponding phosphonium salts with aqueous sodium hydroxide. The olefination reaction proceeds in a diastereoselective manner with formation of the corresponding (E)-alkenes or (E,E)-dienes as the exclusive or major products.