Abstract
Series of phenoxypyrimidines and phenoxytriazines were prepared to be evaluated as herbicides. Among them, 2-(2, 6-dichlorophenoxy)-pyrimidine (XV), 2-phenoxy-4, 6-dimethyl-pyrimidine (XVII), 2-(3-methyl-4-chlorophenoxy)-4, 6-bis(ethylamino)-s-triazine (LIV), 2-(2, 4-dichlorophenoxy)-4, 6-bis(ethylamino)-s-triazine (LVIII), and 2-(2, 6-dichlorophenoxy)-4, 6-bis(ethylamino)-s-triazine (LX) showed high pre-emergent herbicidal activity to radish. On the other hand, 2-chloro-4-(2, 6-dichlorophenoxy)-6-methylpyrimidine (XXX) revealed high efficiency to millet. Some structure-activity relationship is discussed.
