Rhodium(iii)-catalyzed oxidative olefination of N-allyl sulfonamides
作者:Shui Hu、Dongqi Wang、Jiexiang Liu、Xingwei Li
DOI:10.1039/c3ob40272j
日期:——
Rhodium(III)-catalyzed oxidative couplings between N-sulfonyl allylamines and activated olefins have been achieved. Only olefination occurred for acrylates, and the butadiene product can be further cyclized under palladium-catalyzed aerobic conditions. The coupling with N,N-dimethylacrylamide followed a cyclization pathway.
Sulfonamide Directivity Enables Ni-Catalyzed 1,2-Diarylation of Diverse Alkenyl Amines
作者:Omar Apolinar、Van T. Tran、Nana Kim、Michael A. Schmidt、Joseph Derosa、Keary M. Engle
DOI:10.1021/acscatal.0c03857
日期:2020.12.4
amide-directed 1,2-diarylation, which involves carbonyl coordination. The synthetic utility of the method arises from the dual function of the sulfonamide as both a directing group and a masked aminenucleophile. This is highlighted by various product diversifications where complex amine compounds are synthesized in a two-step sequence of N-functionalization and deprotection of the sulfonyl group.
Carbonic Anhydrases inhibitory effects of new benzenesulfonamides synthesized by using superacid chemistry
作者:Fei Liu、Agnès Martin-Mingot、F. Lecornué、Marie-Paule Jouannetaud、Alfonso Maresca、Sebastien Thibaudeau、Claudiu T. Supuran
DOI:10.3109/14756366.2011.638921
日期:2012.12.1
A series of benzofused sultams and fluorinatedbenzenesulfonamides were synthesized in superacid HF/SbF(5) from simple N-allylic derivatives. Almost all of these original compounds showed micromolar inhibitory activities against carbonicanhydrases I and II. The fluorinated derivatives inhibit better the tumor-associated isoforms IX and XII, and one of the tested compounds showed inhibition in the
Cobalt-catalyzed alkene hydrogenation by reductive turnover
作者:Vincent van der Puyl、Ruairi O. McCourt、Ryan A. Shenvi
DOI:10.1016/j.tetlet.2021.153047
日期:2021.5
reactivity for a given metal center result from ligand field strength, which can promote reaction through either open- or closed-shell carbon intermediates. Herein we report a simple protocol for cobalt-catalyzed alkene reduction. Instead of using an oxidative turnover mechanism that requires stoichiometric hydride, we find a reductive turnover mechanism that requires stoichiometric proton. The reaction
Cobalt‐Catalyzed Cascade Reaction of Ynamides and 1,3‐Dicarbonyl Compounds for Selective Synthesis of Differently Sized
<i>N</i>
‐Heterocycles
作者:Biao Zhang、Xu‐Heng Yang、Jian Huang、Cheng‐an Tao、Jianfang Wang
DOI:10.1002/adsc.202201002
日期:2023.3.7
manifold with various 1,3-dicarbonylcompounds and halogenated N-allyl ynamides was accomplished under alkaline reaction conditions, facilitating the synthesis of differently sized N-heterocycles. A large array of products was prepared to demonstrate the selective synthesis of N-heterocycles of different ring sizes (5-, 6-, and 7-membered rings) via cobalt catalysis. The reaction has broad substrate