申请人:Warner-Lambert Company
公开号:US04018798A1
公开(公告)日:1977-04-19
The present invention relates to substituted [4-oxo-4H-1-benzopyran-2-yl]cyclopropane carboxylic acids and esters having the following structural formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen, alkyl, lower alkoxy, phenyl or when R.sub.1 and R.sub.2 are hydrogen, R.sub.3 and R.sub.4 taken together form an additional aromatic ring and A is hydrogen or ethyl. The compounds of this invention exhibit anti-allergy properties and are indicated in the management of allergic manifestations such as bronchial asthma.
本发明涉及具有以下结构式的取代[4-氧代-4H-1-苯并吡喃-2-基]环丙烷羧酸和酯:##STR1##其中R.sub.1、R.sub.2、R.sub.3和R.sub.4为氢、烷基、较低的烷氧基、苯基或当R.sub.1和R.sub.2为氢时,R.sub.3和R.sub.4一起形成一个额外的芳香环,A为氢或乙基。本发明的化合物具有抗过敏性质,并在管理过敏表现如支气管哮喘方面具有指示作用。