Planar chiral [2.2]paracyclophane-based phosphine-Brønsted acid catalysts bearing exceptionally high reactivity for aza-Morita–Baylis–Hillman reaction
作者:Shinji Kitagaki、Yuu Ohta、Ryohei Takahashi、Mika Komizu、Chisato Mukai
DOI:10.1016/j.tetlet.2012.11.021
日期:2013.1
planar chiral bifunctional phosphine compounds based on the [2.2]paracyclophane backbone with a pseudo-ortho substitution pattern have been synthesized and applied to the aza-Morita–Baylis–Hillman reaction. An enantiopure phosphine-phenol catalyst bearing an aryl group as a spacer connected to a phosphino group exhibited an exceptionally high reactivity (rt, 2–40 min) and good enantioselectivity (up to
已经合成了几种新的基于[2.2]对环环烷骨架并具有假邻位取代模式的平面手性双官能膦化合物,并将其应用于氮杂-Morita-Baylis-Hillman反应。带有芳基作为间隔基连接至膦基的对映体纯正膦-苯酚催化剂具有极高的反应活性(室温,2–40分钟)和良好的对映选择性(高达85%ee)。