Alkylation of 5-aryl(hetaryl)tetrazoles with methyl chloromethyl ether under conditions of phase-transfer catalysis leads to formation of isomeric 1- and 2-methoxymethyltetrazoles at a ratio of similar to1:2. The reaction of 5-substituted tetrazoles with alpha-methylstyrene in the presence of trichloroacetic acid gives the corresponding 2-(alpha,alpha-dimethylbenzyl)tetrazoles in high yield and with high regioselectivity.
Processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)
申请人:Syntex (U.S.A.) Inc.
公开号:US05412102A1
公开(公告)日:1995-05-02
The present invention relates to processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-1H-indole-3-carboxyli c acid and to intermediates useful in such processes. The present invention also relates to a process for deprotecting compounds containing a protected 2H-tetrazolyl group, which process comprises reacting a the protected compound with a Lewis acid in the presence of a thiol.
Electrochemical Decarboxylative <i>N</i>-Alkylation of Heterocycles
作者:Tao Sheng、Hai-Jun Zhang、Ming Shang、Chi He、Julien. C. Vantourout、Phil. S. Baran
DOI:10.1021/acs.orglett.0c02799
日期:2020.10.2
An operationally simple method to employ nonactivated carboxylic acids as alkylating agents in the N-alkylation of heterocycles is reported through an electrochemically driven anodic decarboxylative process. A wide substrate scope across a range of heterocycles is demonstrated along with a series of applications that significantly reduce the step count required to access such medicinally relevant structures
[EN] A PROCESS FOR THE PREPARATION OF PHENYLTETRAZOLE DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES DE PHENYLTETRAZOLE
申请人:DIPHARMA SPA
公开号:WO2005014560A1
公开(公告)日:2005-02-17
A process for the preparation of phenyltetrazole derivatives of formula (II) wherein R and Y are as defined in the disclosure, by direct ortho-metallation of (tetrazol-5-Ϝl)benzene. The compounds of formula (II) are useful intermediates for the preparation of angiotensin II antagonists.
Process for the preparation of phenyltetrazole derivatives
申请人:Castaldi Graziano
公开号:US20060183916A1
公开(公告)日:2006-08-17
A process for the preparation of phenyltetrazole derivatives of formula (II) wherein R and Y are as defined in the disclosure, by direct ortho-metallation of (tetrazol-5-γl)benzene. The compounds of formula (II) are useful intermediates for the preparation of angiotensin II antagonists.