Heterocyclic compounds and their use as herbicides

摘要

PCT No. PCT/EP93/02027 Sec. 371 Date Apr. 13, 1995 Sec. 102(e) Date Apr. 13, 1995 PCT Filed Jul. 29, 1993 PCT Pub. No. WO94/03459 PCT Pub. Date Feb. 17, 1994Compounds of the formula wherein m represents 1 or 2, X represents O, S, CH2 or substituted CH2, R1-R4 represent hydrogen or substituted or unsubstituted hydrocarbon groups, and Q represents a substituted phenyl group. These compounds are useful as herbicides and are active in small doses with high selectivity between useful plants and weeds.