Telaprevir fragments as organocatalysts in asymmetric direct aldol reactions of aldehydes
作者:Chen Chen Weng、Xinliang Xu、Xiao Xia Xiong、Xiu Lian Lu、Yi Feng Zhou
DOI:10.1134/s1070363213120414
日期:2013.12
We have demonstrated that the fragments of Telaprevir can act as organocatalysts for asymmetric aldol reactions between aromatic aldehydes and acetone under mild conditions. The reaction conditions have been optimized in terms of the catalyst nature, choice of temperature, solvent, additive, and the catalyst loading. Under proper conditions, fairly good yield and enantioselectivity have been achieved.
Proline–threonine dipeptide as an organocatalyst for the direct asymmetric aldol reaction
A new proline-threonine (H-Pro-Thr-OH) dipeptide has been demonstrated as an efficient organocatalyst for a direct asymmetric aldol reaction. It was found that this new peptide-based catalyst efficiently catalyzed the reaction between an aldehyde and acetone to provide beta-hydroxy ketones in good yields with good enantioselectivities. (c) 2009 Elsevier Ltd. All rights reserved.