Direct Acyl Substitution of Carboxylic Acids: A Chemoselective O- to N-Acyl Migration in the Traceless Staudinger Ligation
作者:Andrew D. Kosal、Erin E. Wilson、Brandon L. Ashfeld
DOI:10.1002/chem.201201773
日期:2012.11.5
chlorophosphite‐modified, Staudinger‐like acylation of azides involving a highly chemoselective, direct nucleophilic acyl substitution of carboxylicacids is described. The reaction provides the corresponding amides with analytical purity in 32–97 % yield after a simple aqueous workup without the need for a pre‐activation step. The use of chlorophosphites as dual carboxylic acid–azide activating agents
Efficient synthesis of carbon-11 labelled acylsulfonamides using [<sup>11</sup>C]CO carbonylation chemistry
作者:Berend van der Wildt、Bin Shen、Frederick T. Chin
DOI:10.1039/c8cc09661a
日期:——
Herein, a novel method for carbon-11 labeling of acyl sulfonamides by a one-step insertive [11C]CO carbonylative cross-coupling reaction between aryl halides and sulfonamides is presented. Various model compounds as well as drug molecules LY573636 (tasisulam) and ABT-199 were obtained in excellent yields. This method provides a valuable and widely applicable contribution to the continuously expanding
Sequential <i>ortho</i>-/<i>meta</i>-C–H functionalizations of <i>N</i>-tosyl-benzamides for the synthesis of polyfunctionalized arenes
作者:Martin Vuagnat、Philippe Jubault、Tatiana Besset
DOI:10.1039/d3cc05919g
日期:——
A one-pot sequential process for the challenging ortho/meta C–H difunctionalizations of simple benzamide derivatives: a direct access to polyfunctionalized arenes.