4076-62-4Relevant academic research and scientific papers
Synthesis of hydroxamic acids by activation of carboxylic acids with N,N'-carbonyldiimidazole: Exploring the efficiency of the method
Usachova, Natalija,Leitis, Gundars,Jirgensons, Aigars,Kalvinsh, Ivars
experimental part, p. 927 - 935 (2010/05/01)
Activation of carboxylic acids with N,N'-carbonyldiimidazole followed by the reaction with anhydrous or aqueous hydroxylamine hydrochloride was demonstrated to be an operationally simple method for the synthesis of hydroxamic acids in good yield and high purity after aqueous workup. The potential by-product, N,O-diacylhydroxylamine, is cleanly transformed to hydroxamic acid in these reaction conditions.
An expeditious hydroxyamidation of carboxylic acids
Ech-Chahad, Abdellah,Minassi, Alberto,Berton, Luca,Appendino, Giovanni
, p. 5113 - 5115 (2007/10/03)
Capitalizing on in situ activation with the cyclic phosphonic anhydride PPAA (1), the conversion of carboxylic acids into hydroxamic acids has been reduced to an experimentally simple one-pot operation that addresses the issue of polyacylation without resorting to a large excess of hydroxylamine or to protection. Scope and selectivity were satisfactory with a wide range of substrates, including α,β-unsaturated acids and hydroxyacids.
