Intermediates for the production of pyridobenzocycloheptene.

摘要

Compounds of the formula : <CHEM> are described in which R1 and R2 are C1-4 alkyl or, taken together with the nitrogen atom to which they are attached, pyrolidinyl or piperidinyl; and X is chloro, bromo or iodo. These compounds are intermediates for azatadine. A process for their preparation and their reaction with an alkali metal cyanide to prepare 3-phenethyl-2-cyano-pyridine are described.