Environmentally friendly TPDS-mediated free radical ring expansion of α-haloalkyl cyclic β-keto esters
作者:Masaaki Sugi、Hideo Togo
DOI:10.1016/s0040-4020(02)00241-7
日期:2002.4
Reactivities of tetraphenyldisilane (TPDS), tris(trimethylsilyl)silane, and tributyltin hydride in the radical ring expansion of α-haloalkyl cyclic β-keto esters were examined. Among these reagents, TPDS was found most effective for the preparation of medium-sized cyclic compounds in terms of yields and ring-expansion/reduction selectivity.
考察了四苯基二硅烷 (TPDS)、三(三甲基甲硅烷基)硅烷和三丁基氢化锡在 α-卤代烷基环状 β-酮酯自由基扩环中的反应性。在这些试剂中,发现 TPDS 在产率和扩环/还原选择性方面对制备中等大小的环状化合物最有效。