反应详情

3.0 g of ethyl (R/S)-2-(3-hydroxy-2-oxo-1-pyrrolidinyl)acetate and 2.87 g of N-(2-aminoethyl)piperidine are heated to 100° for 4 hours under nitrogen. The excess N-(2-aminoethyl)piperidine is distilled in a high vacuum. The (R/S)-N-[2-(1-piperidinyl)ethyl]-2-(3-hydroxy-2-oxo-1-pyrrolidinyl)acetamide remaining as the residue has a melting point of 110°-111° after crystallization from ethyl acetate.

1. distillationThe excess N-(2-aminoethyl)piperidine is distilled in a high vacuum
2. customafter crystallization from ethyl acetate