Highly Efficient DMSO‐Promoted α‐Hydrolysis of α‐Halohydroxamates under Mild Conditions
作者:Chang Yoon Lee、Sung‐Gon Kim
DOI:10.1002/ejoc.202100088
日期:2021.3.12
A novel and efficient method for the nucleophilic α‐hydrolysis of α‐halohydroxamates under metal‐free conditions was achieved. The simple and readily available dimethyl sulfoxide (DMSO) was used as a catalyst, while water served as the nucleophile and oxygen source. This method was successfully employed in the synthesis of secondary α‐hydroxy‐α‐alkyl and α‐hydroxy‐α‐arylhydroxamates as well as tertiary
KOLASA, TEODOZYJ;MILLER, MARVIN J., TETRAHEDRON, 45,(1989) N0, C. 3071-3080
作者:KOLASA, TEODOZYJ、MILLER, MARVIN J.
DOI:——
日期:——
O-Protected 3-hydroxy-oxazolidin-2,4-diones: novel precursors in the synthesis of α-hydroxyhydroxamic acids
作者:Thomas Kurz、Khalid Widyan
DOI:10.1039/b404950k
日期:——
O-Protected 3-hydroxyoxazolidin-2,4-diones have been prepared in a novel one-pot reaction by subsequent treatment of cyanohydrins with 1,1â²-carbonyldiimidazole and O-protected hydroxylamines followed by acidic hydrolysis of the intermediate 4-imino-oxazolidin-2-ones. Decarbonylation of O-protected 3-hydroxyoxazolidin-2,4-diones by catalytic amounts of sodium methoxide, lithium hydroxide, sodium carbonate and caesium carbonate in methanol afforded O-protected α-hydroxyhydroxamic acids in excellent yields. Their deprotection provided a series of novel α-hydroxyhydroxamic acids.