Sr. Fletcher et al., TOTAL SYNTHESIS AND DETERMINATION OF THE ABSOLUTE-CONFIGURATION OF EPIBATIDINE, Journal of organic chemistry, 59(7), 1994, pp. 1771-1778
The synthesis of (+)- and (-)-epibatidine (exo-2-(2-chloropyridin-5-yl
)-7-azabicyclo [2.2.1]heptane) via reaction of 5-lithio-2-chloropyridi
ne with (+)- and (-)-N-BOC-7-azabicyclo[2.2.1]heptan-2-one is describe
d. The absolute configuration of the natural product is shown to be 1R
,2R,4S.