申请人:Fisons Limited
公开号:US04333759A1
公开(公告)日:1982-06-08
The invention provides herbicidally-active 2,3-dihydro-5-cyanobenzofurans of the formula: ##STR1## (wherein: R.sup.1 and R.sup.2 together represent .dbd.O or R.sup.1 represents hydrogen and R.sup.2 represents hydrogen, hydroxy, alkoxy, acyloxy, alkoxycarbonyloxy, alkylthiocarbonyloxy, halogen, isothiocyanato, amino, alkylamino, dialkylamino, arylamino, acylamino, alkoxycarbonylamino, alkylthiocarbonylamino, N-bonded heterocyclyl, cyano or alkylthio; R.sup.3 and R.sup.4 together represent alkylene or each represent hydrogen or alkyl; and R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, each represent hydrogen, halogen, alkyl, alkoxy, acyl or cyano), processes for their preparation and herbicidal compositions containing them. ,
本发明提供了具有除草活性的2,3-二氢-5-氰基苯并呋喃的公式:##STR1## (其中:R.sup.1和R.sup.2一起表示.dbd.O或R.sup.1表示氢,R.sup.2表示氢,羟基,烷氧基,酰氧基,烷氧羰酰氧基,烷基硫代羰酰氧基,卤素,异硫氰酸酯,氨基,烷基氨基,二烷基氨基,芳基氨基,酰胺基,烷氧羰酰胺基,烷基硫代羰酰胺基,N-键合杂环基,氰基或烷硫基; R.sup.3和R.sup.4一起表示烷基亚基或各自表示氢或烷基; R.sup.5、R.sup.6和R.sup.7,可以相同也可以不同,各自表示氢,卤素,烷基,烷氧基,酰基或氰基),其制备过程以及含有它们的除草剂组合物。