Evaluation of mono- and dipeptides as organocatalysts for enantioselective aldol reaction
作者:Cigdem Yolacan、Murat Emrah Mavis、Feray Aydogan
DOI:10.1016/j.tet.2014.04.016
日期:2014.6
4-tetrahydroisoquinoline-3-carboxylic acid (THIQA)-based mono- and dipeptides and their l-proline analogs in asymmetric aldol reaction were investigated. THIQA-based dipeptides showed better enantioselectivity than proline analogs, whereas proline-based dipeptides gave higher yield in the aldol reaction of cyclohexanone with several aldehydes in dichloromethane at −10 °C in the presence of benzoic acid.
研究了(3S)-1,2,3,4-四氢异喹啉-3-羧酸(THIQA)基单肽和二肽及其1-脯氨酸类似物在不对称羟醛反应中的催化活性。基于THIQA的二肽显示出比脯氨酸类似物更好的对映选择性,而在苯甲酸存在下,在-10°C的条件下,环己酮与几种醛在二氯甲烷中的醛醇缩合反应中,基于脯氨酸的二肽具有更高的收率。