The reductive coupling of methyl phenylglyoxylate 2 with aliphatic and aromatic aldehydes 3, promoted by TiCl3/Py system in anhydrous THF. affords α,β-dihydroxyesters 4 in good yields (60–94%) and high syn-diastereoselectivity (up to 85%) The type of ligand at the metal ion necessary to achieve a high level of diastereocontrol and the possible mechanism involved are discussed
TiCl 3 / Py体系在无
水THF中促进了苯基
乙醛酸甲酯2与脂肪族和
芳香族醛3的还原偶联。可以提供高收率(60-94%)和高顺-非对映选择性(高达85%)的α,β-二羟基酯4,其中讨论了实现高
水平非对映控制所必需的
金属离子上的
配体类型及其可能的机理