Studies of Azetidin-2-one as a Reactive Enolate Synthon of β-Alanine for Condensations with Aldehydes and Ketones
作者:David R. Williams、Andrew F. Donnell、David C. Kammler、Sarah A. Ward、Levin Taylor
DOI:10.1021/acs.joc.6b01585
日期:2016.11.4
n-2-one (1) and characterization of representative aldol reactions with aldehydes and ketones. Diastereoselectivity features the production of anti-aldol adducts from α,β-unsaturated ketones and α-branched aliphatic aldehydes. The stereoselectivity is rationalized via closed, six-membered transition-state arrangements leading to the formation of Felkin–Anh and anti-Felkin products. Examples illustrate
研究描述了N-(4-甲氧基苄氧基)氮杂环丁烷-2-酮(1)的烯醇锂的形成以及与醛和酮的代表性醛醇缩合反应的表征。非对映选择性特征是由α,β-不饱和酮和α-支链脂族醛产生抗醛醇加合物。立体选择性通过封闭的六元过渡态排列得以合理化,从而导致形成Felkin -Anh和抗-Felkin产品。实施例说明了将单环β-内酰胺直接掺入各种分子结构中。实用1 通过有效合成包括复杂的4-羟基-2-吡啶酮在内的新型β-氨基酸衍生物,可以说明高甘氨酸(β-丙氨酸)的烯醇式合成子。