反应详情

A mixture comprising 3.7 g. of 1-methyl-4-phenyl-3,4-epoxypiperidine, 2.5 g. of benzylamine and 10 ml. of ethylene glycol was heated at 150° C. on an oil bath overnight. After work-up by the method described in Example 1, 5.45 g. of residue were obtained from which 4.11 g. of the desired free base 1-methyl-4-phenyl-4-(N-benzylamino)-3-hydroxy piperidine were isolated, this compound having a melting point of 162°-4° C.

1. customof residue were obtained from which 4.11 g