A nickel‐catalyzedasymmetric reductive hydroarylation of vinyl amides to produce enantioenriched α‐arylbenzamides is reported. The use of a chiral bisimidazoline (BIm) ligand, in combination with diethoxymethylsilane and aryl halides, enables the regioselective introduction of aryl groups to the internal position of the olefin, forging a new stereogenic center α to the N atom. The use of neutral reagents
N,O-acetals are important structures found in many bioactive natural products, and this unique organic functional group can serve as a useful synthetic precursor to the unstable N-acylimines. In this paper, a convenientroute to synthesize N-carbamoyl-N,O-acetals and N-acyl-N,O-acetals from enecarbamates and enamides in the presence of alcohols as the solvents and nucleophile sources under Brønsted
Hydroalkoxylation of Enamides Catalyzed by <i>N</i>-Heteroarenium Iodides
作者:Rui Sun、Junyi Wang、Haoran Liang、Shuo Li、Xiao Yang
DOI:10.1021/acs.joc.3c02453
日期:2024.3.1
hydroalkoxylation of enamides has been described. The protocol provides easy access to N,O-acetals, which proved to be a versatile synthetic synthon. The hydrosulfonylation, hydroamination, and hydrophosphorylation products of enamide could be indirectly provided from N,O-acetals. The reaction mechanism was further investigated, which indicated that the hydroalkoxylation of enamides was driven by weak