On the Asymmetric Induction in Proline-Catalyzed Aldol Reactions: Reagent-Controlled Addition Reactions of 2,2-Dimethyl-1,3-dioxane-5-one to Acyclic Chiral α-Branched Aldehydes
作者:Jasna Marjanovic Trajkovic、Vesna Milanovic、Zorana Ferjancic、Radomir N. Saicic
DOI:10.1002/ejoc.201701073
日期:2017.11.9
Proline-catalyzed aldol addition reactions of 2,2-dimethyl-1,3-dioxane-5-one to chiral aldehydes proceed under reagent stereocontrol (in both matched and mismatched cases) if aldehyde α-oxy or α-amino substituents are acyclic. For cyclic substituents, the stereochemical outcome of the aldolization in mismatched cases is difficult to predict.
如果醛的α-氧基或α-氨基取代基是无环的,则在试剂立体控制下(在匹配和不匹配的情况下),脯氨酸催化的2,2-二甲基-1,3-二恶烷-5-酮与手性醛的羟醛加成反应。对于环状取代基,在不匹配的情况下醛醇缩合的立体化学结果很难预测。