N-(4-methylbenzenesulfonyl)- pyrrolidines and piperidines by a tandem SN2-michael addition reaction
摘要:
A tandem S(N)2-Michael addition sequence has been developed for the preparation of N-(4-methylbenzenesulfonyl)- pyrrolidines and piperidines bearing functionalized side chains at C-2.
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/Brønstedacid/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)pyrrolidinederivatives 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