Enterokinetic benzamide

A process of preparing a compound of formula

• or a pharmaceutically acceptable acid addition salt thereof;
• wherein a) an intermediate of formula (II) is N-alkylated with an alkylating reagent of formula (III), wherein W is an appropriate leaving group in a reaction inert solvent in the presence of a suitable base;
• or b) an amine of formula (V) is N-acylated with a carboxylic acid of formula (IV)
• and, if desired, converting a compound of formula (I) into a therapeutically active non-toxic acid addition salt, or conversely, converting an acid addition salt into a free base form with alkali.