Acetic Acid → HCID 19031118, compound

Participants

Reaction Steps

A mixture of N-(1-benzyl-4-piperidinyl)-o-formylaniline (32.0 g), diethyl malonate (35.4 g), piperidine (5 ml), acetic acid (2.5 ml), anhydrous toluene (320 ml) and molecular sieves (32 g) is refluxed for 8 hours. After concentrating the reaction mixture, dichloromethane is added to the residue and the mixture is filtered. Water is added to the filtrate and the mixture is extracted with dichloromethane. After concentrating the extract, the resulting residue is purified by silica gel column chromatography (eluent; dichloromethane/methanol=50/1) to give 3-ethoxycarbonyl-1-(1-benzyl-4-piperidinyl)carbostyril (27.2 g)

Provenance & Evidence