Kinetic Resolution of Sulfinamides via Asymmetric <i>N</i>-Allylic Alkylation
作者:Gao-Liang Zheng、Chenxi Lu、Jin-Pei Cheng、Xin Li
DOI:10.1021/acs.orglett.1c03221
日期:2021.11.5
An efficient kineticresolution of sulfinamides via an asymmetric N-allylic alkylation reaction was realized using hydroquinine as a catalyst under mild conditions. The kineticresolution of a range of Morita–Baylis–Hillman adducts and N-aryl tert-butylsulfinamides was highly effective. In addition, the synthetic utility of the protocol was demonstrated by a scaled-up reaction. Density functional theory
The palladium-catalyzed C–N cross coupling of sulfinamides and arylhalides is reported. In the presence of Pd2(dba)3, tBuXPhos, NaOH, and a small amount of water, the C–N cross coupling of chiral tert-butanesulfinamide and arylhalides was accomplished to give N-aryl tert-butanesulfinamide without racemization, and the coupling of racemic p-toluenesulfinamide smoothly afforded N-aryl p-toluenesulfinamides
Addition–Rearrangement of Ketenes with Lithium<i>N</i>-<i>tert</i>-Butanesulfinamides: Enantioselective Synthesis of α,α-Disubstituted α-Hydroxycarboxylic Acid Derivatives
作者:Peng-Ju Ma、Fan Tang、Yun Yao、Chong-Dao Lu
DOI:10.1021/acs.orglett.9b01555
日期:2019.6.21
Addition of the lithium salts of chiral N-substituted tert-butanesulfinamides to ketenes and subsequent silylation initiates stereoselective [2,3]-rearrangement, which affords enantioenriched α,α-disubstituted α-sulfenyloxy carboxamides through a reaction that faithfully transfers the absolute stereochemistry of the lithiated sulfinylamides to the α-carbon of the amide products. This addition–rearrangement