Enamine-mediated Mannich reaction of cyclic <i>N</i>,<i>O</i>-acetals and amido acetals: the multigram synthesis of pyrrolidine alkaloid precursors
作者:Rakhymzhan A. Turmanov、Andrey V. Smolobochkin、Almir S. Gazizov、Tanzilya S. Rizbayeva、Danil D. Zapylkin、Julia K. Voronina、Alexandra D. Voloshina、Victor V. Syakaev、Alexey V. Kurenkov、Alexander R. Burilov、Michail A. Pudovik
DOI:10.1039/d2ob01276f
日期:——
The cooperative L-proline/Brønsted acid/base promoted reaction of 2-ethoxypyrrolidines or N-substituted 4,4-diethoxybutan-1-amines with methyl(alkyl/aryl)ketones for the synthesis of 2-(acylmethylene)pyrrolidine derivatives is reported. The key features of the developed protocol are gram-scale synthesis of the target compounds, easily available starting materials, operational simplicity and usage of
报道了协同L-脯氨酸/布朗斯台德酸/碱促进 2-乙氧基吡咯烷或N-取代的 4,4-二乙氧基丁-1-胺与甲基(烷基/芳基)酮合成 2-(酰基亚甲基)吡咯烷衍生物. 所开发方案的主要特点是目标化合物的克级合成、易于获得的起始材料、操作简单和使用非昂贵试剂。