Total Synthesis and Determination of the Absolute Configuration of Epibatidine
摘要:
The synthesis of (+)- and (-)-epibatidine (exo-2-(2-chloropyridin-5-yl)-7-azabicyclo [2.2.1]heptane) via reaction of 5-lithio-2-chloropyridine with (+)- and (-)-N-BOC-7-azabicyclo[2.2.1]heptan-2-one is described. The absolute configuration of the natural product is shown to be 1R,2R,4S.
作者:Stephen R. Fletcher、Raymond Baker、Mark S. Chambers、Sarah C. Hobbs、Paul J. Mitchell
DOI:10.1039/c39930001216
日期:——
The synthesis of the alkaloid epibatidine exo-2-(2-chloro-5-pyridyl)-7-azabicyclo[2.2.1]heptane} in enantiomeric form involving, as the critical step, reaction or 5-lithio-2-chloropyridine with N-tert-butoxycarbonyl-7-azabicyclo[2.2.1]heptan-2-one is described.
Total Synthesis and Determination of the Absolute Configuration of Epibatidine
作者:Stephen R. Fletcher、Raymond Baker、Mark S. Chambers、Richard H. Herbert、Sarah C. Hobbs、Steven R. Thomas、Hugh M. Verrier、Alan P. Watt、Richard G. Ball
DOI:10.1021/jo00086a030
日期:1994.4
The synthesis of (+)- and (-)-epibatidine (exo-2-(2-chloropyridin-5-yl)-7-azabicyclo [2.2.1]heptane) via reaction of 5-lithio-2-chloropyridine with (+)- and (-)-N-BOC-7-azabicyclo[2.2.1]heptan-2-one is described. The absolute configuration of the natural product is shown to be 1R,2R,4S.
Synthesis of Cyclohexenylamines by Ring Closing Metathesis
作者:Martin E. Maier、Tzvetelina Lapeva
DOI:10.1055/s-1998-1789
日期:1998.8
Starting from 5-pentenaldehyde 1, the 1-allyl-4-pentenylamines 2a-d were prepared. The ring closing metathesis reaction of these dienes using the Grubbs catalyst 3 gave the corresponding cyclohexenylamines 4a, b and 4d in high yield. The secondary amine 2c was recovered unchanged. This route to compound 4d represents a formal total synthesis of the alkaloid epibatidine. In additon, 4b was transformed by electrophilic transannular cyclization to the bicyclic urethanes 5a and 5b.