Patent ID: 8263809

Claim:
A process for preparing a compound corresponding to formula (VIII): wherein R 1 represents H, C 3-8 cycloalkyl, C 1-6 alkylcarbonyl, tetrahydropyranyl, or C 1-3 alkyl substituted with phenyl or naphthyl; or an acid addition salt thereof, said process comprising: a) acylating a compound corresponding to formula (VI): wherein R represents C 3-8 cycloalkyl, C 1-6 alkylcarbonyl, tetrahydropyranyl, or C 1-3 alkyl substituted with phenyl or naphthyl; with an acylating agent to yield a compound corresponding to formula (VII): b) hydrogenolyzing the compound of formula (VII) using a catalyst in an inert solvent in the presence of hydrogen to yield a compound of formula (VIII); c) if R 1 ≠H, optionally deprotecting the group R 1 of formula (VIII); and d) optionally converting the compound of formula (VIII) into an acid addition salt.