| abstract |
NEW MATERIAL: A compd. represented by formula I [wherein A is N or C-R 3 (wherein R 3 is a halogen, cyano, alkyl, alkoxy, alkylthio, etc., B is N or C-R 4 (wherein R 4 is halogen, cyano, alkyl, alkoxy, phenyl, etc.), R 1 is H, a halogen, cyano, nitro, alkyl, etc., R 2 is H, a halogen, alkyl, etc., X is O or S but N- isopropyl-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)-oxyacetanilide is excepted. n EXAMPLE: N-isopropyl-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)-3'-chloro- oxyacetanilide. n USE: A herbicide showing good selective characteristics and strong herbicidal action. n PROCESS: A heteroarylene represented by formula II (D: a nucleus leaving group) is reacted with an N-isopropylhydroxyacetanilide represented by formula III to obtain the compd. represented by the formula I. n COPYRIGHT: (C)1990,JPO |