专利号:US-5977112-A 优先权日:1995-04-20 标 题:Process of making substituted benzofurans 发明人:BATHE ANDREAS; HELFERT BERND; BOTTCHER HENNING; SCHUSTER KURT 权利人:MERCK PATENT GMBH 摘要:Benzofurans of the formula I ##STR1## and their salts in which R 1 , R 2 and X have the meanings indicated in claim 1, are suitable as intermediates in the synthesis of medicaments and show effects on the central nervous system.