Process for the preparation of 4(3H)-quinazolinones
申请人:Merrell Dow Pharmaceuticals Inc.
公开号:US04644065A1
公开(公告)日:1987-02-17
A new process for the preparation of 3-(1H-tetrazol-5-yl)-4(3H)-quinazolinones from anthranilic acid derivatives is described herein. Additional reactants used in the process are 4-aminotetrazole and a trialkoxymethane or the reaction can be carried out using the imidic ester obtained from these two compounds.
VINOGRADOFF, ANNA P.;PEET, NORTON P., J. HETEROCYCL. CHEM., 26,(1989) N, C. 97-103
作者:VINOGRADOFF, ANNA P.、PEET, NORTON P.
DOI:——
日期:——
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作者:VINOGRADOFF A. P.
DOI:——
日期:——
Development of a new synthesis of 3-(1<i>H</i>-tetrazol-5-yl)-4(3<i>H</i>)-quinazolinone, sodium salt<i>via</i>an amidine intermediate
作者:Anna P. Vinogradoff、Norton P. Peet
DOI:10.1002/jhet.5570260118
日期:1989.1
experimental mediator release inhibitor, was developed from: (1) reaction of 5-aminotetrazole 3 and triethyl orthoformate 6 to give ethyl N-(1H-tetrazol-5-yl)formimidate 8, (2) reaction of methyl anthranilate and imidate 8 to give amidine 11, and (3) treatment of 11 with base to give 1. Investigation of each of these steps independently led to a significantly more efficient, facile and higher-yielding 1-pot