申请人:Warner-Lambert Company
公开号:US04158663A1
公开(公告)日:1979-06-19
This invention is concerned with a novel process for the production of 2-substituted chromones (I) from readily available 4-methoxycoumarins. ##STR1## These compounds are useful as antiallergy agents.
这项发明涉及一种从易得的4-甲氧基香豆素制备2-取代色酮(I)的新工艺。这些化合物可用作抗过敏剂。