High-Pressure-Mediated Asymmetric Organocatalytic Hydroxyalkylation of Indoles with Trifluoromethyl Ketones
作者:Adrian Kasztelan、Michał Biedrzycki、Piotr Kwiatkowski
DOI:10.1002/adsc.201600327
日期:2016.9.15
An enantioselective hydroxyalkylation of indoles and 7‐azaindole with trifluoromethyl ketones was found to be effectively promoted under high‐pressure conditions with a low loading of Cinchona alkaloids (e.g., 1–3 mol% of cinchonidine). Chiral tertiary alcohols containing a trifluoromethyl group were obtained at 9 kbar with good yield and enantioselectivity up to 89%, whereas usually merely traces
发现在高压条件下,低负荷的金鸡纳生物碱(例如1-3 mol%的金鸡尼定)可以有效地促进吲哚和7-氮杂吲哚与三氟甲基酮的对映选择性羟烷基化。在9kbar下以良好的收率和高达89%的对映选择性获得了具有三氟甲基的手性叔醇,而通常在大气压下仅检测到痕量的产物。