Snipping tool: Zn(OTf)2 is an efficient catalyst for selective cleavage of amides bearing a β‐hydroxyethyl group on the nitrogen atom. The mechanism involves an N,O‐acyl rearrangement and transesterification. This new catalytic system can be applied to sequence‐specific peptide bond scission at the amine side of a serine residue. Tf=trifluoromethanesulfonyl.
A base-mediated procedure for the amidation of unactivated esters with aminoalcohols is reported. Optimization and exemplification of the catalytic process are described, furnishing products in 40–100% isolated yield.
N-Heterocyclic Carbene-Catalyzed Amidation of Unactivated Esters with Amino Alcohols
作者:Mohammad Movassaghi、Michael A. Schmidt
DOI:10.1021/ol050773y
日期:2005.6.1
[reaction: see text] A catalytic amidation of unactivated esters with aminoalcohols is described. A series of solution studies in addition to the first X-ray structure of a carbene-alcohol complex support a carbene-base nucleophile activation mechanism.
Amidation of Esters with Amino Alcohols Using Organobase Catalysis
作者:Nicola Caldwell、Peter S. Campbell、Craig Jamieson、Frances Potjewyd、Iain Simpson、Allan J. B. Watson
DOI:10.1021/jo501929c
日期:2014.10.3
the base-mediated amidation of unactivated esters with amino alcohol derivatives is reported. Investigations into mechanistic aspects of the process indicate that the reaction involves an initial transesterification, followed by an intramolecular rearrangement. The reaction is highly general in nature and can be extended to include the synthesis of oxazolidinone systems through use of dimethyl carbonate
Palladium-Catalyzed Selective Amino- and Alkoxycarbonylation of Iodoarenes with Aliphatic Aminoalcohols as Heterobifunctional O,N-Nucleophiles
作者:László Kollár、Attila Takács、Csilla Molnár、Andrew Kovács、László T. Mika、Péter Pongrácz
DOI:10.1021/acs.joc.2c02712
日期:2023.4.21
heteroaromatic substrates and numerous related nucleophiles were tested under optimized conditions, providing moderate to good yields of the target compounds. Reactions of serinol and 1,3-diamino-2-propanol as model trifunctional compounds showed particularly high chemoselectivity on amide ester products. Considering the coordinative properties of the applied nucleophiles, a rational catalytic cycle was proposed