Lactams of sparteine

Abstract

(2,2- 2 H 2 )Sparteine, (6- 2 H)sparteine, (10,10- 2 H 2 )sparteine, (15,15- 2 H 2 )sparteine, (17α- 2 H)sparteine, (17β- 2 H)sparteine, (17,17- 2 H 2 )sparteine, (17α- 2 H)lupanine, and (17β- 2 H)lupanine were prepared and employed to assign the 1 H nmr spectrum of sparteine. Contrary to a published report, photochemical oxidation of sparteine does not lead to 15-oxosparteine but to 17-oxosparteine.