申请人:Ciba-Geigy Corporation
公开号:US04205082A1
公开(公告)日:1980-05-27
New benzopyrane derivatives of the general formula ##STR1## in which R is free, esterified or amidated carboxyl, Ph is 1,2-phenylene which contains the group R--CO--NR.sub.3 -- and is otherwise unsubstituted or is substituted, X is a group of the formula --CO--CR.sub.1 .dbd.CR.sub.2 --, in which R.sub.1 and R.sub.2 independently of one another are hydrogen, acyl or a substituted or unsubstituted hydrocarbon radical or a hetero-analogue thereof, or conjointly are 3-membered to 5-membered lower alkylene, and R.sub.2 can also be free or etherified hydroxyl or hydroxyl etherified by an organic carboxylic acid, and R.sub.3 is hydrogen or lower alkyl, are useful as anti-allergic agents.
通用公式为##STR1##的新苯并吡喃衍生物,其中R是自由的、酯化的或酰胺化的羧基,Ph是1,2-苯基,其中含有基团R--CO--NR.sub.3--,否则未取代或被取代,X是公式--CO--CR.sub.1.dbd.CR.sub.2--的基团,其中R.sub.1和R.sub.2彼此独立地是氢、酰基或取代或未取代的碳氢基团或其杂原子衍生物,或共同是3-5元的低碳烷基,R.sub.2也可以是自由的或被有机羧酸醚化的羟基或羟基醚化的,R.sub.3是氢或低碳基,作为抗过敏剂是有用的。