Phosphonyl radical addition to enol ethers. The stereoselective synthesis of cyclic ethers
作者:Christopher M. Jessop、Andrew F. Parsons、Anne Routledge、Derek J. Irvine
DOI:10.1016/j.tetlet.2004.04.173
日期:2004.6
Addition of diethyl phosphite or diethyl thiophosphite to enol ethers, in the presence of a radical initiator, results in the regioselective synthesis of organophosphonate or phosphonothioate derivatives, respectively, under mild conditions. This method can be applied to the stereoselective formation of substituted tetrahydrofurans and tetrahydropyrans, on cyclisation of vinyl ethers bearing unsaturated
在自由基引发剂的存在下,将亚磷酸二乙酯或亚乙基硫代磷酸二乙酯加到烯醇醚中,导致在温和条件下分别进行有机膦酸酯或硫代膦酸酯衍生物的区域选择性合成。该方法可用于在带有不饱和侧链的乙烯基醚环化时,取代的四氢呋喃和四氢吡喃的立体选择性形成。