2-[(1-cyanopropyl)carbamoyl]-5-chloromethyl nicotinic acids of formula (I) where Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; R1 is C1-C4 alkyl; R2 is C1-C4 alkyl, C3-C6 cycloalkyl or R1 and R2, when taken together with the atom to which they are attached, represent a C3-C6 cycloalkyl group optionally substituted with methyl, and R3 is hydrogen or a cation preferably selected from the group consisting of alkali metals, alkaline earth metals, manganese, copper, iron, zinc, cobalt, lead, silver, nickel, ammonium and organic ammonium; are useful intermediates for the synthesis of herbicidal imidazolinones.
式(I)中,Z是氢或卤素;Z1是氢、卤素、
氰基或硝基;R1是C1-C4烷基;R2是C1-C4烷基、C3-C6环烷基或R1和R2,当它们与它们所连接的原子一起取代时,表示可选地用甲基取代的C3-C6环烷基;R3是氢或阳离子,优选从含有碱
金属、碱土
金属、
锰、
铜、
铁、
锌、
钴、
铅、
银、
镍、
铵和有机
铵的群中选择;这些化合物是合成
除草剂咪唑烷酮的有用中间体。