Observations on the Reaction of <i>N</i>-Alkyloxazolidines, Isocyanides and Carboxylic Acids: A Novel Three-Component Reaction Leading to <i>N</i>-Acyloxyethylamino Acid Amides
N-Alkyloxazolidines, readily prepared by condensation of the parent carbonyl compounds with β-aminoalcohols, were found to undergo three-component reactions with isocyanides and carboxylic acids to give N-acyloxyethylamino acid derivatives in good yield. The reaction allows the variation of substituents at five different sites in the products through suitable choice of reagents.
A General Metal‐Free Protocol for the Visible‐Light‐Driven Protection of Carbonyls
作者:Lorenzo Di Terlizzi、Eirini M. Galathri、Stefano Protti、Christoforos G. Kokotos、Maurizio Fagnoni
DOI:10.1002/cssc.202201998
日期:2023.1.20
Carbonylprotection: This work highlights the potential of arylazo sulfones as non-ionic photoacid generators (PAGs) to promote the efficient conversion of aldehydes and ketones into acetals, ketals, and 1,3-oxazolidines upon visible-light irradiation. This approach takes advantage of the mild conditions employed and exhibits an easy scalability and a broad substrate scope (80 examples included).