Epiandrosterone-derived prolinamide as an efficient asymmetric catalyst for Michael addition reactions of aldehydes to nitroalkenes
作者:Yongchao Wang、Shen Ji、Kun Wei、Jun Lin
DOI:10.1039/c4ra03075c
日期:——
Epiandrosterone derivatives-organocatalyzed asymmetricMichaeladdition of aldehydes to nitroalkenes was investigated. Among the various catalysts, a novel type of epiandrosterone-derived L-prolineamide catalyst was synthesized and exhibited better performance in both catalytic activity and stereoselectivity, providing the products with high yields (up to 98%), excellent enantioselectivities (up to
Prolylprolinol-Catalyzed Asymmetric Michael Addition of Aliphatic Aldehydes to Nitroalkenes
作者:Dengfu Lu、Yuefa Gong、Weizhou Wang
DOI:10.1002/adsc.200900687
日期:2010.3.8
Several novel prolylprolinol catalysts have been designed and synthesized. This type of compound showed high catalytic efficiency on promoting the direct addition of unmodified aldehydes to nitroalkenes. Among the catalysts surveyed, the least bulky member (8d) exhibited the best performance on both efficiency and stereoselectivity, providing the products with up to 97% ee value with 1.5–5 mol% catalyst
Asymmetric Michael Reaction Catalyzed by Proline Lithium Salt: Efficient Synthesis of<scp>L</scp>-Proline and Isoindoloisoquinolinone Derivatives
作者:Kun Xu、Sheng Zhang、Yanbin Hu、Zhenggen Zha、Zhiyong Wang
DOI:10.1002/chem.201202409
日期:2013.3.11
Lithium makes it possible: The enantioselective Michael addition of aldehydes to nitroalkenes was catalyzed by the readily available proline lithium salt. Remarkably, the asymmetric Michael reaction was scaled up to 50 mmol with 23:1 d.r. and 90 % ee.
Organocatalytic asymmetric Michael addition of aldehydes and ketones to nitroalkenes catalyzed by adamantoyl <scp>l</scp>-prolinamide
作者:Yongchao Wang、Dong Li、Jun Lin、Kun Wei
DOI:10.1039/c4ra11214h
日期:——
series of adamantoyl L-prolinamides have been synthesized. These compounds have been found to be highly efficient organocatalysts for the Michaeladdition of aldehydes and ketones to nitroalkenes. Under the optimized reaction conditions, the corresponding Michael adducts were obtained in good yields (up to 95%), excellent enantioselectivities (up to 99% ee) and moderate diastereoselectivities.
Asymmetric Organocatalysis Accelerated via Self‐Assembled Minimal Structures
作者:Arianna Sinibaldi、Francesca Della Penna、Marco Ponzetti、Francesco Fini、Silvia Marchesan、Andrea Baschieri、Fabio Pesciaioli、Armando Carlone
DOI:10.1002/ejoc.202101042
日期:2021.10.21
Self-assembling minimalistic peptides embedded with an organocatalytic moiety were designed and tested in a Michael reaction as a proof of concept for acceleratedorganocatalysis.