n of alkenes with anilines has been developed for the atom-economical synthesis of 2-substituted propanamides bearing an α-stereocenter. A novel phosphoramidite ligand L16 was discovered which exhibited very high reactivity and selectivity in the reaction. This asymmetric Markovnikov hydroaminocarbonylation employs readily available starting materials and tolerates a wide range of functional groups
Base-catalyzed synthesis of aryl amides from aryl azides and aldehydes
作者:Sheng Xie、Yang Zhang、Olof Ramström、Mingdi Yan
DOI:10.1039/c5sc03510d
日期:——
Aryl amides are efficiently synthesized from the rearrangement of triazolines, which formed in the base-catalyzed azide–aldehyde cycloaddtion.
芳基酰胺可以通过三唑烯的重排合成,三唑烯是在碱催化的叠氮化物-醛环加成中形成的。
<i>N</i>,<i>N</i>-Diethylurea-Catalyzed Amidation between Electron-Deficient Aryl Azides and Phenylacetaldehydes
作者:Sheng Xie、Olof Ramström、Mingdi Yan
DOI:10.1021/ol503655a
日期:2015.2.6
Experimental data support 1,3-dipolarcycloaddition between DEU-activated enols and electrophilic phenyl azides, especially perfluoroaryl azides, followed by rearrangement of the triazolineintermediate. The activation of the aldehyde under near-neutral conditions was of special importance in inhibiting dehydration/aromatization of the triazolineintermediate, thus promoting the rearrangement to form aryl amides
A catalytic and tert-butoxide ion-mediated amidation of aldehydes with para-nitro azides
作者:Giorgio Carbone、James Burnley、John E. Moses
DOI:10.1039/c3cc40452h
日期:——
We report here a new catalytic reaction in which, para-nitro azides are acylated by aldehydes to produce amides and molecular nitrogen in a single step. The transformation is believed to proceed via an electron transfer process mediated by the tert-butoxide ion, and catalysed by a thiazolium salt derived species.
Acid-free regioselective aminocarbonylation of alkenes
作者:Huizhen Liu、Ning Yan、Paul J. Dyson
DOI:10.1039/c4cc02167c
日期:——
An efficient method for the synthesis of N-aryl monosubstituted carboxamides via the Pd-catalyzed carbonylation of alkenes with CO and amines is described.