Brouwer, Antoon C.; Leusen, Albert M. van, Synthetic Communications, 1986, vol. 16, # 8, p. 865 - 870
作者:Brouwer, Antoon C.、Leusen, Albert M. van
DOI:——
日期:——
BROUWER, A. C.;LEUSEN, A. M., SYNTH. COMMUN., 1986, 16, N 8, 865-869
作者:BROUWER, A. C.、LEUSEN, A. M.
DOI:——
日期:——
Process for the synthesis of imidazoles
申请人:Dolby J. Lloyd
公开号:US20050101785A1
公开(公告)日:2005-05-12
The present invention provides a process for the preparation of imidazoles by reacting a cyano compound with a silylalkylisocyanide compound. Such imidazoles are useful pharmacologically-active compounds and/or intermediates for the preparation of pharmacologically-active compounds.
The reaction of isocyanomethylenetriphenylphosphorane, generated in situ from the corresponding phosphonium salt, with a diverse set of aldehydes afforded vinyl isocyanides in good to high yields. Excellent E-selectivity was observed for aliphatic aldehydes and 2,6-disubstituted aromatic aldehydes, whereas Z-olefins were formed predominantly with ortho-substituted aryl aldehydes. (Z)-1-Bromo-2-(2-