Synthesis of 2-(2,6-dichloro-4-pyridyl)-3-propargyl-5-ethyl-6-methyl-4(3H)-pyrimidinone, a promising new herbicide
作者:Edward C Taylor、Ping Zhou、Colin M Tice、Zev Lidert、Renee C Roemmele
DOI:10.1016/s0040-4039(97)00946-5
日期:1997.6
A novel synthesis of the promising new herbicide 2-(2,6-dichloro-4-pyridyl)-3-propargyl-5-ethyl-6-methyl-4(3)-pyrimidinone (12) is reported which features (1) regioselective carbon, followed by nitrogen, dialkylation of an intermediate dianion, and (2) a tandem “one-pot” sequence of reactions involving sigmatropic sulfoxide elimination, lithium chloride-induced demethylation of a carbomethoxy grouping
报道了一种新颖的有希望的新型除草剂2-(2,6-二氯-4-吡啶基)-3-炔丙基-5-乙基-6-甲基-4(3 )-嘧啶酮的合成方法(12)。区域选择性碳,然后进行氮,中间二价阴离子的二烷基化,以及(2)串联的“一锅”反应序列,涉及σ型亚砜消除,氯化锂诱导的甲氧基羰基脱甲基化,脱羧和异构化/芳构化。