C. Csutoras et al., A NEW AND EFFICIENT ONE-POT SYNTHESIS OF APOMORPHINE AND ITS RING-A HALOGENATED DERIVATIVES, Synthetic communications, 26(12), 1996, pp. 2251-2256
Rearrangement and O-demethylation of codeine (2) and various 6-demetho
xythebaine derivatives 6-11 with morphinane skeletone into apomorphine
(3) and its halogenated derivatives 20-24 could, be efficiently execu
ted in a one-pot operation, by treatment with methanesulfonic acid/met
hionine.