申请人:Daiso Co., Ltd.
公开号:US06271388B1
公开(公告)日:2001-08-07
An industrial process for preparing an oxazolidin-2-one derivative represented by the following general formula (3)
wherein R1, R2, R3 and R4 are hydrogen atom, straight, branched or cyclic alkyl group, straight or branched alkyl group substituted by alkoxy, substituted amino or alkylthio, substituted or unsubstituted aralkyl group, or substituted or unsubstituted aryl group, and R5 is are hydrogen atom, straight, branched or cyclic alkyl group, substituted or unsubstituted aralkyl group, or substituted or unsubstituted aromatic ring,
which is characterized in reacting a 1,3-dioxolan-2-one derivative and a carbamate derivative or an urea derivative in the presence of a fluoride salt.
一种工业制备氧唑烷-2-酮衍生物的工艺,表示为以下通式(3),其中R1、R2、R3和R4分别为氢原子、直链、支链或环烷基,被烷氧基、取代氨基或烷硫基取代的直链或支链烷基,取代或未取代芳基或取代或未取代芳基,R5为氢原子、直链、支链或环烷基,取代或未取代芳基,或取代或未取代芳环,其特征在于在氟化盐存在下,使1,3-二氧杂环-2-酮衍生物与碳酸酯衍生物或脲衍生物发生反应。