This invention relates to novel herbicidal compounds having the formula ##STR1## in which X is chloro, bromo, trifluoromethyl, methyl or ethyl; R.sub.1 is hydrogen or C.sub.3 -C.sub.5 alkenyl; and R.sub.2 is (a) C.sub.3 -C.sub.5 alkenyl if R.sub.1 is C.sub.3 -C.sub.5 alkenyl; (b) C.sub.3 -C.sub.5 alkyl, C.sub.3 -C.sub.5 alkenyl or C.sub.3 -C.sub.6 alkynyl if X is chloro, methyl, ethyl or trifluoromethyl and R.sub.1 is hydrogen; and (c) C.sub.1 -C.sub.5 alkyl, C.sub.3 -C.sub.5 alkenyl or C.sub.3 -C.sub.6 alkynyl if X is bromo and R.sub.1 is hydrogen. These compounds have been found to exhibit herbicidal properties.
本发明涉及具有以下式子的新型
除草剂化合物: ##STR1## 其中X为
氯、
溴、三
氟甲基、甲基或乙基;R.sub.1为氢或C.sub.3-C.sub.5烯基;R.sub.2为(a)C.sub.3-C.sub.5烯基,如果R.sub.1为C.sub.3-C.sub.5烯基;(b)C.sub.3-C.sub.5烷基、C.sub.3-C.sub.5烯基或C.sub.3-C.sub.6炔基,如果X为
氯、甲基、乙基或三
氟甲基,且R.sub.1为氢;以及(c)C.sub.1-C.sub.5烷基、C.sub.3-C.sub.5烯基或C.sub.3-C.sub.6炔基,如果X为
溴且R.sub.1为氢。这些化合物已被发现具有除草性能。