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
A Facile Synthesis of 2-Oxazolines via Dehydrative Cyclization Promoted by Triflic Acid
作者:Tao Yang、Chengjie Huang、Jingyang Jia、Fan Wu、Feng Ni
DOI:10.3390/molecules27249042
日期:——
oxazoline production. Herein, we report a triflicacid (TfOH)-promoted dehydrative cyclization of N-(2-hydroxyethyl)amides for synthesizing 2-oxazolines. This reaction tolerates various functional groups and generates water as the only byproduct. This method affords oxazoline with inversion of α-hydroxyl stereochemistry, suggesting that alcohol is activated as a leaving group under these conditions
La présente invention concerne des composé ayant l'une des formules (I) ou (II) suivantes :
ainsi que leurs utilisations.
本发明涉及具有下式(I)或(II)之一的化合物:
的化合物及其用途。
Manganese(II)-Catalyzed Esterification of N-β-Hydroxyethylamides
作者:Kazushi Mashima、Yuji Nishii、Shoko Akiyama、Yusuke Kita
DOI:10.1055/s-0034-1380428
日期:——
A catalyst system of manganese with 2,2-bipyridine for amide alcoholysis of N-beta-hydroxyethylamides is described. This protocol enabled selective cleavage of the amide bond through a mechanism involving sequential N,O-acyl rearrangement and transesterification.
VLAHOV, ANTONIJA;VOLF, DUSAN, ACTA PHARM. JUGOSL., 39,(1989) N, C. 97-104