.alpha.-Amino carbanions. Preparation, metalation, and alkylation of enamidines. Synthesis of piperidine and pyrrolidine natural products and homologation of carbonyl compounds
作者:A. L. Meyers、Philip D. Edwards、Thomas R. Bailey、G. Erik Jagdmann
DOI:10.1021/jo00207a023
日期:1985.4
Tf<sub>2</sub>O-Promoted Intramolecular Schmidt Reaction of the ω-Azido Carboxylic Acids
作者:Xue-Juan Wang、Yan Su、Rui Li、Peiming Gu
DOI:10.1021/acs.joc.8b00475
日期:2018.5.18
A designed Tf2O-promoted intramolecular Schmidt reaction of 2-substituted ω-azido carboxylicacids was demonstrated. Tf2O was used as an activation reagent for the carboxylicacid, and ω-azido anhydride was in situ generated, releasing a molecular TfOH, which acted as an acid promoter for the Schmidt process. A series of 2-substituted pyrrolidines was produced and acetylated for better purification