Jk. Dutton et al., A TOTAL SYNTHESIS OF GELSEMINE - OXINDOLE SPIROANNELATION, Journal of the Chemical Society, Chemical Communications, (6), 1994, pp. 765-766
Photolysis of alkoxy-substituted-1-alkenylbenzotriazoles provides a ne
w route to spiro-oxinaoles which has been utilised in a total synthesi
s of gelsemine.