The synthesis of ynamides in water was achieved by a micellarcatalysis strategy using rosin‐based surfactant APGS‐550‐M, which can be easily prepared from natural abundant biomass.
Practical N-Hydroxyphthalimide-Mediated Oxidation of Sulfonamides to N-Sulfonylimines
作者:Jian Wang、Wen-Jing Yi
DOI:10.3390/molecules24203771
日期:——
through the oxidation of sulfonamides mediated by N-hydroxyphthalimide under mild conditions has been developed. Compared to reported oxidation methods, broader substrates scope and milder conditions were achieved in our method. Importantly, this oxidation method can afford N-sulfonyl enaminones using Mannich products as starting materials. Additionally, the one-pot Friedel–Crafts arylation reaction of unseparated
An efficient method for copper-catalyzed cross-coupling of 1,1-dibromo-1-alkenes with sulfonamides has been achieved by a rosin-based surfactant-enabled micellar catalysis. A variety of ynamides can be prepared in water under micellar conditions. This method features broad substrate scope, good functional group tolerance, great recyclability, and green solvent.
Dynamic Kinetic Resolution of α-Trifluoromethyl Hemiaminals without α-Hydrogen via NHC-Catalyzed <i>O</i>-Acylation
作者:Yuan-Yuan Gao、Chun-Lin Zhang、Lei Dai、You-Feng Han、Song Ye
DOI:10.1021/acs.orglett.1c00024
日期:2021.2.19
Following the well-recognized dynamickineticresolution (DKR) of hemiaminals with α-hydrogen under lipase and chiral DMAP catalysis, the unprecedented DKR of hemiaminals without α-hydrogen was developed via N-heterocyclic carbene catalyzed O-acylation of 3-hydroxy-3-trifluoromethylbenzosultams. The racemic hemiaminals without α-hydrogen were effectively racemized and differentiated by chiral NHCs
The present protocol highlights a novel and single-step synthesis of aryl/heteroaryl-fused 1H-pyrrolo[3,2-c]pyridines under a catalytic amount of Cu(ii) and Zn(ii) salts.