RAYNOIDS, P. W., J. HETEROCYCL. CHEM., 1984, 21, N 4, 1231-1232
作者:RAYNOIDS, P. W.
DOI:——
日期:——
US4307239A
申请人:——
公开号:US4307239A
公开(公告)日:1981-12-22
A novel synthesis of precursors to 3-thienylmalonic acid
作者:Peter W. Raynolds
DOI:10.1002/jhet.5570210461
日期:1984.7
prepared in 95% yield by treating methyl 2-cyano-2-(3-tetra-hydrothienylidene)acetate with sulfuryl chloride, followed by dehydrohalogenation with pyridine. The product can be hydrolyzed to 3-thienylmalonicacid, a pharmaceutical intermediate.
Disclosed is a process for the preparation of thiophenes having the formula ##STR1## by contacting a compound having the formula ##STR2## with certain amine bases. Other amine bases can be employed when a two-phase reaction system is used.