[EN] PROCESS FOR PREPARATION OF 5-SUBSTITUTED TETRAZOLES<br/>[FR] PROCÉDÉS DE PRÉPARATION DE TÉTRAZOLES SUBSTITUÉS EN 5
申请人:SMS PHARMACEUTICALS LTD
公开号:WO2010133909A2
公开(公告)日:2010-11-25
The present invention is a process for preparing sterically hindered 5-substituted tetrazole, which comprises of reacting a nitrile with an organotin halide and an azide in presence of a phase transfer catalyst, in an organic solvent and a co- solvent at reflux temperature for 4 to 20 h.