Acrylamide in the Baylis−Hillman Reaction: Expanded Reaction Scope and the Unexpected Superiority of DABCO over More Basic Tertiary Amine Catalysts
作者:Cornelia Faltin、Eimear M. Fleming、Stephen J. Connon
DOI:10.1021/jo0490907
日期:2004.9.1
DMAP, DBU, and quinuclidine efficiently promote novel hydroalkoxylation reactions of acrylamide in primary alcohol solvents. DABCO is a comparatively poor hydroalkoxylation promoter and can effect clean, selective Baylis-Hillman reactions between acrylamide and aldehydes in alcoholic/aqueous media in which more basic nucleophilic catalysts promote hydroalkoxylation preferentially. Optimization of the reaction conditions has allowed acrylamide to be reacted with a range of aromatic aldehydes in moderate to excellent yields, including the first examples involving deactivated, electron-rich substrates such as p-tolualdehyde and o-anisaldehyde.
Substrate Profiling of the Cobalt Nitrile Hydratase from Rhodococcus rhodochrous ATCC BAA 870
作者:Adelaide R. Mashweu、Varsha P. Chhiba-Govindjee、Moira L. Bode、Dean Brady
DOI:10.3390/molecules25010238
日期:——
cross-coupling reactions and imidazo[1,2-a]pyridines prepared by the Groebke–Blackburn–Bienaymé multicomponent reaction. The enzyme active site was moderately accommodating, accepting almost all of the small aromatic nitriles, the diarylpyridines and most of the bi-aryl compounds and Morita–Baylis–Hillman products but not the Groebke–Blackburn–Bienaymé products. Nitrile conversion was influenced by steric