Studies on Alkamines. VII

The sequence of following reactions was studied: L(+)-ψ-ephedrine→L(+)-N-acetyl-ψ-ephedrine→L-N-acetyl-ψ-ephedrine chlorosulfinate→L(-)-ephedrine hydrochlorid and L(-)-ephedrine→L(+)-N-acetylephedrine→L-N-acetylephedrine chlorosulfinate→L(+)-ψ-ephedrine hydrochloride. By these steps L(+)-ψ-ephedrine was converted to L(-)-ephedrine hydrochlorid, the yield of which was 70-75% of the theoretical amount based on N-acetyl-ψ-ephedrine.