| abstract |
NEW MATERIAL: A thiophene compd. represented by formula I (wherein n is 0 or 1; R 1 to R 5 are each H, a halogen, 1-8C alkyl or 1-6C halogenalkoxy, R 2 to R 5 are each CN or NO 2 ; A is H, a 1-8C alkyl, 1-6C halogenalkyl, 1-8C alkoxy, 1-6C halogenalkyl, aryl or heteroaryl capable of having 1-5 halogen atoms, etc., OR 6 or NR 7 R 8 ; R 6 is H, a 1-8C alkyl, 3-7C alkynyl, etc., and R 7 and R 8 are H, a 1-8C alkyl, 1-8C alkoxy, etc.) and its environmentally acceptable salt. n EXAMPLE: 5'-Chloro-O-(2-butynyl)-2,2'-bithiophene-5-carbaldoxime. n USE: A herbicide. n PROCESS: A compd. represented by formula II is reacted with a corresponding hydroxylamine compd., hydrazine compd. or primary amine to obtain the compd. represented by formula I. n COPYRIGHT: (C)1990,JPO |