Arylation Using Sulfonamides: Phenylacetamide Synthesis through Tandem Acylation–Smiles Rearrangement
作者:Helen L. Barlow、Pauline T. G. Rabet、Alastair Durie、Tim Evans、Michael F. Greaney
DOI:10.1021/acs.orglett.9b03429
日期:2019.11.15
and heterocyclic sulfonamides react with phenylacetyl chlorides to produce benzhydryl derivatives in a single step. The reaction proceeds via tandem amide bond formation/Dohmori-Smiles rearrangement under the simple conditions of an aqueous base. In the case of o-nosylamides, a further reaction takes place at the nitro group to yield indazoles.
Titanium-Promoted Acylation of Sulfonamides to<i>N</i>-Acylsulfonamide PPAR<font>α</font>Antagonists
作者:Alessandra Ammazzalorso、Maria Luisa Tricca、Isabella Bruno、Barbara De Filippis、Mauro Di Matteo、Marialuigia Fantacuzzi、Letizia Giampietro、Cristina Maccallini、Adriano Mollica、Rosa Amoroso
DOI:10.1080/00397911.2015.1092552
日期:2015.11.17
The direct acylation of sulfonamides by esters represents an attractive strategy in organic chemistry, being an interesting alternative to classical approaches to N-acylsulfonamides. Here is described a simple and effective method to obtain N-acylsulfonamides of pharmaceutical interest, in a reaction promoted by titanium(IV) chloride. This strategy was successfully applied to the synthesis of a peroxisome proliferator-activated receptor antagonist with a benzenesulfonimide moiety, ensuring an excellent yield of product. The reaction was further studied to explore the behavior of different -bromoesters and esters and the effects of para-substitution in the benzenesulfonamide moiety.
Practical Synthesis of Amides from In Situ Generated Copper(I) Acetylides and Sulfonyl Azides
作者:Michael P. Cassidy、Jessica Raushel、Valery V. Fokin
DOI:10.1002/anie.200503805
日期:2006.5.5
Naito et al., Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1954, vol. 74, p. 596