Asymmetric NHC-Catalyzed Redox α-Amination of α-Aroyloxyaldehydes
作者:James E. Taylor、David S. B. Daniels、Andrew D. Smith
DOI:10.1021/ol402955f
日期:2013.12.6
(NHC)-catalyzed redox reaction of α-aroyloxyaldehydes with N-aryl-N-aroyldiazenes to form α-hydrazino esters with highenantioselectivity (up to 99% ee) is reported. The hydrazide products are readily converted into enantioenriched N-aryl amino esters through samarium(II) iodidemediated N–N bond cleavage.
α-Aroyloxyaldehydes: scope and limitations as alternatives to α-haloaldehydes for NHC-catalysed redox transformations
作者:Kenneth B. Ling、Andrew D. Smith
DOI:10.1039/c0cc02456b
日期:——
α-Aroyloxyaldehydes are readily prepared bench stable synthetic intermediates. Their ability to act as α-haloaldehyde surrogates for NHC-promoted redox esterifications and in [4+2] cycloadditions is described.