已经报道了(苯磺酰基)乙腈,芳族醛和6-氨基尿嘧啶的一锅三组分缩合反应,用于制备6,8a-二氢吡啶并[2,3- d ]嘧啶衍生物。该方法涉及多米诺Knoevenagel缩合/迈克尔加成和环化级联。该反应在甘油中进行,甘油是可商购的,廉价且无毒的化合物。产品的高纯度,极高的收率和广泛的底物是该方案的优点。
Organocatalytic Domino Reaction of Cyanosulfones: Access to Complex Cyclohexane Systems with Quaternary Carbon Centers
作者:Sundaram Rajkumar、Kenneth Shankland、Jonathan M. Goodman、Alexander J. A. Cobb
DOI:10.1021/ol400356k
日期:2013.3.15
of a bifunctionalthiourea catalyst, a highlystereoselective domino reaction occurs to generate complex cyclohexanes with up to four stereogenic centers, one of which is quaternary in nature. Therefore, it is demonstrated that, like nitro compounds, sulfones can undergo an asymmetric intramolecular conjugate addition to α,β-unsaturated esters in the presence of a bifunctionalorganocatalyst.