Process for the production of benzyl-piperidylmethyl-indanone

摘要

Prodn of a benzyl-piperidylmethylindanone deriv of formula (I) comprises hydrogenation of a pyridinium salt of formula (II) with H2 in the presence of a hydrogenation catalyst, opt in an inert solvent. R1-R4 = H, halo, 1-6C alkyl, alkoxy, alkoxycarbonyl or alkylaminocarbonyloxy or di-(1-6C)alkylaminocarbonyloxy; Ph = phenyl; X<-> = chloride, bromide, iodide, tosylate or sulphate.