| abstract |
NEW MATERIAL:A compound shown by formula I (A is phenyl, B is phenyl; R is lower alkyl, lower alkoxy or lower haloalkyl; W is OH or halogen; Z is halogen, lower alkylsulfonyloxy or phenylsulfonyloxy). n EXAMPLE: 1-Bromo-3-[N-(4-chlorophenylsulfonyl)-N-methylamino)]-2-phenyl-2- propanol. n USE: A herbicide having extremely strongly herbicidal effects on Echinochloa crus-galli Beauv. var. praticola Ohwi., most harmful weed in paddy field. n PREPARATION: For example, a compound shown by formula II is reacted with a compound shown by the formula HOZ 1 (Z 1 is halogen) to give a compound shown by formula Ia. The reaction is preferably carried out in water or an aqueous solvent by reacting the compound with an an alkaline metallic salt of hypohalogenous acid. n COPYRIGHT: (C)1990,JPO&Japio |