5-Cyano-2,3-dihydrobenzofurans useful as herbicides

Chemistry: fertilizers – Processes and products – Forms or conditioning

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71 91, 71 94, 71 95, 544163, 546196, 549 10, 26032634, 2603403, 2603433R, 26034622, 26034673, 260465D, 260465E, 260465F, A01N 4308, C07D30783

Patent

active

042630371

ABSTRACT:
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.

REFERENCES:
patent: 4162154 (1979-07-01), Gates et al.

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