Unconventional isomerization of allylic alcohols to allylcarbinols mediated by lanthanide catalysts
作者:SungYong Seo、Xianghua Yu、Tobin J. Marks
DOI:10.1016/j.tetlet.2013.01.111
日期:2013.4
We report here the catalytic isomerization of aryl-substituted allylic alcohols mediated by lanthanide alkoxide complexes. The conversion yields allylcarbinols as the products of the olefin isomerization process, but with different olefinic positions than those afforded by typical transition metal catalysts. The average isolated product yields in these reactions are 65–81%. The catalytic cycle and
Synthesis of allylic and homoallylic alcohols from unsaturated cyclic ethers using a mild and selective C–O reduction approach
作者:Daniel J. Mack、Boying Guo、Jon T. Njardarson
DOI:10.1039/c2cc33551d
日期:——
Unsaturated cyclic ethers can be mildly and selectively reduced with catalytic amounts of B(C(6)F(5))(3) in the presence of an alkylsilane. The allylic position is preferentially reduced with minimal or no scrambling of olefin geometry. For electronically equivalent substrates, steric factors guide the reducing agent to the least substituted site.