Process Chemistry Related to the Experimental Rice Herbicide 2,2-Dimethyl-1-(4-methylthio-5-pyrimidinyl)indane
作者:Thomas J. Dietsche、David B. Gorman、Jon A. Orvik、Gary A. Roth、William R. Shiang
DOI:10.1021/op000033z
日期:2000.7.1
Two concisesyntheses of the experimental rice herbicide 2,2-dimethyl-1-(4-methylthio-5-pyrimidinyl)indane are reported. The initial synthesis relies on a low-temperature addition of 5-lithio-4-methylthiopyrimidine to 2,2-dimethyl-1-indanone to construct the pyrimidinylindane system. Process improvements to this route are described and resulted in the preparation of 90 kg of the title compound on pilot
报道了实验性水稻除草剂 2,2-二甲基-1-(4-甲硫基-5-嘧啶基)茚满的两种简明合成。最初的合成依赖于将 5-锂硫代-4-甲基硫代嘧啶低温添加到 2,2-二甲基-1-茚满酮中以构建嘧啶基林丹系统。描述了对该路线的工艺改进,并导致在中试规模上制备了 90 kg 的标题化合物。经济学要求确定使用廉价原材料的新合成路线。本文详述了新途径的初步发现,其特征在于溶解金属还原/甲酰化/环化的新组合以构建必需的嘧啶环。