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。
Diastereoselective Synthesis of Functionalized 5‐Amino‐3,4‐Dihydro‐2
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‐Pyrrole‐2‐Carboxylic Acid Esters: One‐Pot Approach Using Commercially Available Compounds and Benign Solvents
A novel three‐step four‐transformation approach to highly functionalized 5‐amino‐3,4‐dihydro‐2H‐pyrrole‐2‐carboxylic acid esters, starting from commercially available phenylsulfonylacetonitrile, aldehydes, and N‐(diphenylmethylene)glycine tert‐butyl ester, was developed. The one‐pot strategy delivered this class of amidines bearing, for the first time, three contiguous stereocenters, in good to high