Novel 4,5-disubstituted pyrimidine derivative and herbicide

摘要

PCT No. PCT/JP94/01847 Sec. 371 Date May 1, 1996 Sec. 102(e) Date May 1, 1996 PCT Filed Nov. 1, 1994 PCT Pub. No. WO95/12582 PCT Pub. Date May 11, 1995A novel 4,5-disubstituted pyrimidine derivative of the formula (I): (I) wherein R1 is CF2X (X is Cl or Br), R2 is a C1-C8 alkyl group, a C3-C8 cycloalkyl group, etc., R3 is a halogen atom, SH, NH2, etc., and R4 is a hydrogen atom, a halogen atom, a C1-C6 alkyl group, etc., is a herbicide having excellent activities.