申请人:Fisons Limited
公开号:US04263037A1
公开(公告)日:1981-04-21
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.
该发明提供了具有除草活性的2,3-二氢-5-氰基苯并呋喃类化合物,化学式如下:##STR1##(其中:R.sup.1和R.sup.2一起表示.dbd.O,或者R.sup.1表示氢,R.sup.2表示氢、羟基、烷氧基、酰氧基、烷氧羰氧基、烷基硫代羰氧基、卤素、异硫氰酸酯基、氨基、烷基氨基、二烷基氨基、芳基氨基、酰胺基、烷氧羰基胺基、烷基硫代羰基胺基、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,或者各自表示氢或烷基;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),以及它们的制备方法和含有它们的除草剂组合物。