Preparation of Masked 2,2-Difluoro-1,3-diols and 2,2-Difluoro-1,3,4-butanetriol via Photochemical and Thermal Addition of Oxygenated Radicals to 2,2-Difluorovinyl Carbamate
作者:Takashi Okano、Akira Nakajima、Shoji Eguchi
DOI:10.1055/s-2001-16809
日期:——
Photoreaction of difluorovinyl carbamate in some alcohols except for methanol gave radical addition products as masked forms of 2,2-difluoro-1,3-diols. 1,3-Dioxolane also gave a radical product in thermal radical reaction initiated bynzoyl peroxide. Radical product of 2,2-Dimethyl-1,3-dioxolane was converted into masked 2,2-difluoro-1,3-propanediol.
除甲醇外的某些醇中,二氟乙烯基碳酸酯的光反会生成自由基加成产物,这些产物以2,2-二氟-1,3-二醇的隐匿形式存在。1,3-二恶烷在偶氮二甲酰胺过氧化物引发的热自由基反应中也能生成自由基产物。2,2-二甲基-1,3-二恶烷的自由基产物可转化为隐匿形式的2,2-二氟-1,3-丙二醇。