| abstract |
NEW MATERIAL: Compd. of formula I [wherein R 1 is ethyl, propyl or isopropyl; R 2 is a halogen, NO 2 , CF 3 , CN, a 1-4C alkyl, etc.; n is 0-3; Y is O or S; R 3 is H, a 1-8C alkyl, a 2-8C alkenyl, etc., R 4 is formula II or III (wherein E is CH or N; G is O of CH 2 ; R 5 and R 6 are each H, a halogen, a 1-6C alkyl, etc.) etc.] or their salts. n EXAMPLE: 3-(4,6-dimethoxypyrimidine-2-yl)-1-(2-ethoxyphenyoxy sulfonyl)urea. n USE: A herbicide. A plant growth adjusting agent. Excellent activity is exhibited to a wide range of weeds of monocots and dicots and no damage is given to cultivated plants. n PROCESS: Phenoxysulfonylisocyanate of formula IV and an amine of formula V are reacted in an inert non-protonic solvent (e.g. acetonitrile) at 0°C to b.p. of the solvent to obtain a compd. of formula I. n COPYRIGHT: (C)1990,JPO |