申请人:Takeda Chemical Industries, Ltd.
公开号:US04151180A1
公开(公告)日:1979-04-24
The present invention relates to novel chromone derivatives, which are shown by the following general formula ##STR1## wherein n is 0 or 1, m is 0, 1 or 2 when each of R's represents halogen, nitro, straight or branched alkyl having 1 to 6 carbon atoms, cyclic alkyl having 3 to 6 carbon atoms or butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any two adjacent carbon atoms at positions 5, 6, 7 and 8, --COOR', wherein R' is hydrogen, lower alkyl, aralkyl, carboxamide which may be unsubstituted or substituted by at least one lower alkyl or aralkyl, or amino group which may be unsubstituted or substituted by R'CO--, wherein R' is a straight or branched chain alkyl or aryl, or lower alkyl, aralkyl or aryl, m is 0 or 1 when each of R's represents hydroxy, lower alkoxy or R'COO--, wherein R' is a straight or branched chain alkyl or aryl. The novel derivatives are useful as intermediates for chromones having effective anti-allergic action.
本发明涉及一种新型的咔喃衍
生物,其通式如下:##
STR1##其中n为0或1,m为0、1或2,当R代表卤素、硝基、直链或支链烷基(1至6个
碳原子)、
环烷基(3至6个
碳原子)或
丁二烯基(--CH.dbd.CH--CH.dbd.CH--)时,它与位置5、6、7和8上的任意两个相邻
碳原子形成
苯环,或为--COOR',其中R'为
氢、低级烷基、芳基烷基、羧
酰胺基,该羧
酰胺基可以未被取代或被至少一个低级烷基或芳基烷基取代,或为
氨基,该
氨基可以未被取代或被R'CO--取代,其中R'为直链或支链烷基或芳基,或为低级烷基、芳基烷基或芳基,当每个R代表羟基、低级烷
氧基或R'COO--时,m为0或1。这些新型衍
生物可用作具有有效抗过敏作用的咔喃
中间体。