have developed a novel synthetic route to nitrogen-containing heterocycles via radical addition–ionic cyclization reaction. Treatment of oxime ethers carrying the tosyloxy group with Et3B and alkyl iodide in the presence of Lewis acid gave the substituted pyrrolidines and piperidines. The reaction of oxime ethers carrying the methoxycarbonyl group proceeded under the same conditions to give the amino
Total Synthesis of Pyrrolidine and Piperidine Natural Products via TMSOTf-Mediated “5/6-<i>endo-dig</i>” Reductive Hydroamination of Enynyl Amines
作者:Santosh J. Gharpure、Raj K. Patel、Krishna S. Gupta
DOI:10.1021/acs.orglett.3c02115
日期:2023.8.11
acid-mediated 5/6-endo-dig reductive hydroamination cascade of enynyl amines. The brevity of the developed strategy allowed for the collective stereoselective totalsynthesis of various alkaloids, including (±)-pyrrolidine cis-225H, (±)-epi-197B, (±)-epi-225C, the family of (+)-solenopsins and (+)-isosolenopsins, and the formal synthesis of (±)-bgugaine and (+)-azimic acid.