Would you care to back that up by showing the mechanism by which this happens? To my knowledge, the only working synthesis involves three steps:
1. Codeine is treated with thionyl chloride to yield a-chlorocodide
2. a-chlorocodide is reduced (hydrogenated), giving desocodeine:
3. Finally, the desocodeines remaining methoxy group is demethylated giving desomorphine:
But hey, if there's a way to trim this down to 2 steps, or even one, I would be interested to see how that could happen!