154905-38-1Relevant articles and documents
Total Synthesis and Determination of the Absolute Configuration of Epibatidine
Fletcher, Stephen R.,Baker, Raymond,Chambers, Mark S.,Herbert, Richard H.,Hobbs, Sarah C.,et al.
, p. 1771 - 1778 (1994)
The synthesis of (+)- and (-)-epibatidine (exo-2-(2-chloropyridin-5-yl)-7-azabicycloheptane) via reaction of 5-lithio-2-chloropyridine with (+)- and (-)-N-BOC-7-azabicycloheptan-2-one is described.The absolute configuration of the natural product is shown to be 1R,2R,4S.
Microbiological Oxygenation of Bridgehead Azabicycloalkanes
Davis, Charles R.,Johnson, Roy A.,Cialdella, Joyce I.,Liggett, Walter F.,Mizsak, Stephen A.,Marshall, Vincent P.
, p. 2244 - 2251 (2007/10/03)
A series of N-substituted bridgehead azabicycloalkanes has been prepared and examined as substrates for microbiological oxygenation using the fungi Beauveria bassiana, Rhizopus nigricans, Aspergillus ochraceus, and Rhizopus arrhizus. Oxygenation using B. bassiana of N-tosyl-7- azabicyclo[2.2.1]heptane gave N-[p-(hydroxymethyl)benzenesulfonyl]-7-azabicyclo[2.2.1]heptane (56% yield), of N-(phenyloxycarbonyl)-7-azabicyclo[2.2.1]heptane gave the 2-endo-ol (56% yield, 51% ee), of N-BOC-7-azabicyclo[2.2.1]heptane gave the 2-endo-ol (10% yield), of N-Cbz-7-azabicyclo- [2.2.1]heptane gave the 2-endo-ol (28%), of N-(phenyloxycarbonyl)-8-azabicyclo[3.2.1]octane gave the 3-endo-ol, and of N-(phenyloxycarbonyl)-9-azabicyclo[3.3.1]nonane gave the 3-exo-ol (30%) and 3-one (16%). Oxygenation using R. nigricans of N-BOC-7-azabicyclo[2.2.1]heptane gave the 2-endo-ol (62% yield, 28% ee) and the 2-exo-ol (27% yield, 42% ee). Oxidation of the N-BOC-7-azabicyclo- [2.2.1]heptan-2-ols gives the 2-ketone, a synthetic intermediate useful for conversion to the natural product, epibatidine. Oxygenation of N-(phenyloxycarbonyl)-7-azabicyclo[2.2.1]heptane using R. arrhizus gives the 2-endo-ol (5% yield, 31% ee) and the 2-exo-ol (18% yield, 22% ee). Oxygenation of N-(phenyloxycarbonyl)-8-azabicyclo[3.2.1]octane using A. ochraceous gives the 3-endo-ol (36%) and the 3-one (4%).