Practical Application of the Aqueous ‘Sulfonyl-Azide-Free’ (SAFE) Diazo Transfer Protocol to Less α-C–H Acidic Ketones and Esters
作者:Dmitry Dar’in、Grigory Kantin、Mikhail Krasavin
DOI:10.1055/s-0039-1690613
日期:2019.11
Abstract The earlier described ‘sulfonyl-azide-free’ (‘SAFE’) protocol for diazo transfer to CH-acidic 1,3-dicarbonyl compounds (and their similarly activated congeners) has been extended to the less reactive monocarbonyl substrates, which previously required a separate activation step. Formylation in situ, followed by the addition of an optimized amount of the ‘SAFE cocktail’ (obtained by mixing sodium
抽象的 较早描述的重氮转移至CH酸性1,3-二羰基化合物(及其类似活化的同类物)的``无磺酰叠氮''(``SAFE'')方案已扩展至反应性较低的单羰基底物,以前需要单独的激活步骤。甲酰化原位,然后加入“安全鸡尾酒”的优化量的(通过混合叠氮化钠,碳酸钾,和得到米导致期望的重氮化合物的形成,这是由分离-carboxybenzenesulfonyl氯化物在水中)提取的产率中等至极好,并且在大多数情况下,无需额外纯化。 较早描述的重氮转移至CH酸性1,3-二羰基化合物(及其类似活化的同类物)的``无磺酰叠氮''(``SAFE'')方案已扩展至反应性较低的单羰基底物,以前需要单独的激活步骤。甲酰化原位,然后加入“安全鸡尾酒”的优化量的(通过混合叠氮化钠,碳酸钾,和得到米导致期望的重氮化合物的形成,这是由分离-carboxybenzenesulfonyl氯化物在水中)提取的产率中等至极好,并且在大多数情况下,无需额外纯化。