Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
4,5-disubstituted pyrimidine derivatives and herbicides
 A novel 4,5-disubstituted pyrimidine derivative of the formula (I): ##STR1## wherein R1 is CF.sub.2 X (X is Cl or Br), R.sub.2 is a C.sub.1 -C.sub.8 alkyl group, a C.sub.3 -C.sub.8 cycloalkyl group, etc., R3 is a halogen atom, SH, NH.sub.2, etc., and R4 is a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.6 alkyl group, etc., is a herbicide having excellent activities. 
Nissan Chemical Industries, Ltd.
C C C A A A C A A A A
C07D C07F C07D A01N A01N A01N C07D A01N A01N A01N A01N
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Kazuhisa Takumi Kunimitsu Yasuo Tsutomu Kimihiro Shigeomi Jun Yoshihiro Yoichi
Sudo Mikashima Nakahira Kondo Nawamaki Ishikawa Watanabe Satow Kudo Ito