Asymmetric Organocatalysis in the Remote (3 + 2)-Cycloaddition to 4-(Alk-1-en-1-yl)-3-cyanocoumarins
作者:Beata Łukasik、Marta Romaniszyn、Nathan Kłoszewski、Łukasz Albrecht
DOI:10.1021/acs.orglett.3c01189
日期:2023.5.26
The application of organocatalytic bifunctional activation in the remote (3 + 2)-cycloaddition between 4-(alk-1-en-1-yl)-3-cyanocoumarins and imines derived from salicylaldehyde is demonstrated. Products, bearing two biologically relevant units, have been obtained with good chemical and stereochemical efficiency. The stereochemical outcome of the process results from the application of a quinine-derived
Remote Functionalization of 4‐(Alk‐1‐en‐1‐yl)‐3‐Cyanocoumarins via the Asymmetric Organocatalytic 1,6‐Addition
作者:Marta Romaniszyn、Katarzyna Gronowska、Łukasz Albrecht
DOI:10.1002/adsc.202100660
日期:2021.11.23
AbstractAn organocatalytic 1,6‐addition using 4‐(alk‐1‐en‐1‐yl)‐3‐cyanocoumarins as acceptors has been developed. Dienolates derived from 5‐substituted‐furan‐2(3H)‐ones have been employed as pronucleophiles, therefore, enabling the synthesis of hybrid molecules bearing two biologically relevant units. Appropriate design of substrates and the application of quinine‐derived catalyst resulted in very good site‐selectivity as well as chemical and stereochemical efficiency of the process.magnified image