HCID 13061531, compound → HCID 13061551, compound

Participants

Reaction Steps

A solution of 5 g of 2-(1-o-chlorophenethyl-4-hydroxy-4-piperidyl)propionic acid phenyl ester and 50 cc of n-butylamine is boiled at reflux for 18 hours in an atmosphere of nitrogen. The excess n-butylamine is then removed by evaporation at reduced pressure, the residue is taken up in chloroform and the organic phase is washed twice with water and dried over magnesium sulphate. The chloroform is evaporated at reduced pressure. The residue is treated with maleic acid in acetone and the title compound is crystallized from acetone/ether (M.P. of hydrogen maleate 132°-133° C.).

Provenance & Evidence