AbstractA one‐pot oxidative transformation of aldehydes into hydroxamic acids by the use of an aqueous solution of hydroxylamine is reported. The methodology gives high yields and makes use of cheap, abundant and easily available reagents.magnified image
[EN] PI-3 KINASE INHIBITOR PRODRUGS<br/>[FR] PROMEDICAMENTS D'INHIBITEURS DE PI-3 KINASE
申请人:SEMAFORE PHARMACEUTICALS INC
公开号:WO2004089925A1
公开(公告)日:2004-10-21
The invention provides novel prodrugs of inhibitors of PI-3 kinase. The novel compounds are LY294002 and analogs thereof comprising a reversibly quaternized amine.
handled one-pot synthetic procedure was previously developed for the synthesis of bisphosphinates starting from acyl chlorides. Herein, other trivalent derivatives as acid anhydrides and activated esters were tested to form various bisphosphinates. This modulation of the reactivity can be controlled according to the nature of the acid derivative for the use of sensitive and functionalized substrates
A copper-catalysed amidation of aldehydes via N-hydroxysuccinimide ester formation
作者:Monica Pilo、Andrea Porcheddu、Lidia De Luca
DOI:10.1039/c3ob41440j
日期:——
A copper-catalysed oxidative amidation of aldehydes via N-hydroxysuccinimide ester formation is reported. The methodology employed to prepare amides directly fromaldehydes has a very wide scope, is high yielding, and does not need dry conditions. This cross-coupling reaction appears to be simple and makes use of cheap, abundant and easily available reagents.
An efficient method to prepare amides by a cascade strategy was developed. Using nBu4NI or NaI as the catalyst and tert-butyl hydroperoxide as the oxidant, various alcohols reacted with N-hydroxysuccinimide or N-hydroxyphthalimide affording corresponding active esters in moderate to good yield. The resulting active esters were converted into amides smoothly in one pot.
开发了一种通过级联策略制备酰胺的有效方法。使用n Bu 4 NI或NaI作为催化剂,氢过氧化叔丁基作为氧化剂,各种醇与N-羟基琥珀酰亚胺或N-羟基邻苯二甲酰亚胺反应,以中等至良好的产率提供相应的活性酯。在一锅中将所得的活性酯平稳地转化为酰胺。
<i>N</i>-Heterocyclic carbene (NHC) catalyzed amidation of aldehydes with amines <i>via</i> the tandem <i>N</i>-hydroxysuccinimide ester formation
作者:Ashmita Singh、A. K. Narula
DOI:10.1039/d1nj00591j
日期:——
A facile method for the amidation of aldehydes by a cascade approach was developed. This methodology, reported for the first time, uses a N-heterocycliccarbene (NHC) as the catalyst, and N-hydroxysuccinimide (NHS) mediated synthesis of amides utilising TBHP as the oxidant. Various substituted aldehydes reacted smoothly with NHS giving the corresponding active esters in moderate to good yields, which