Chiral 1,2-diaminocyclohexane as organocatalyst for enantioselective aldol reaction
作者:Yi Liu、Junfeng Wang、Qi Sun、Runtao Li
DOI:10.1016/j.tetlet.2011.04.116
日期:2011.7
catalyze the asymmetric aldol reaction in MeOH–H2O. Cyclic ketones as aldol substrates gave the anti-β-hydroxyketone products with moderate to good yields, diastereoselectivity and enantioselectivity (up to 78% yield, >20:1 anti/syn, 94% ee). Hydroxyacetone as aldol substrate afforded the syn-α, β-dihydroxyketones as major products in up to 85% yield with good enantioselectivity (up to >20:1 syn/anti
一个简单的和可商购的手性1,2-二氨基环己烷作为催化剂,己二酸作为助催化剂能有效地催化在MeOH-H不对称醛醇缩合反应2 O.环酮类如醇醛底物,得到反-β-羟基酮产品具有中度至良好的收率,非对映选择性和对映选择性(高达78%的收率,抗/顺式> 20:1,94%ee)。羟丙酮作为醇醛底物以主要产物顺-α,β-二羟基酮的形式提供了高达85%的收率和良好的对映选择性(高达> 20:1 syn / anti,93%ee)。