Molybdenum- and Rhenium-catalyzed Isomerization of Cyclopropanemethanols to Tetrahydrofurans
作者:Yasunari Maeda、Takahiro Nishimura、Sakae Uemura
DOI:10.1246/cl.2005.790
日期:2005.6
Molybdenum- and rhenium-complexes work as affective catalysts for isomerization of a variety of cyclopropanemethanols into the corresponding tetrahydrofurans in good to high yields. The reaction may proceed via 1) [3,3]sigmatropic rearrangement involving an oxo metal cyclopropanemethanolate accompanied by the C–C bond cleavage and 2) the metal-catalyzed intramolecular hydroalkoxylation of the initially produced homoallylic alcohols.
钼和铼复合物作为有效催化剂,使多种环丙烷梅醇异构化为相应的四氢呋喃,反应产率良好至高。该反应可能通过以下途径进行:1)涉及氧金属环丙烷梅醇盐的[3,3]σ-迁移重排,同时伴随C–C键的断裂;2)金属催化的初生成的同位醇的分子内氢氧基化反应。