Synthesis of 2-2-(3,4,5-Trimethoxybenzoyloxy)ethylpyrrolidine Hydrochloride Controlled by GC-MS,~1H and ~(13)C NMR Analyses

摘要

The synthesis of 2-2-(3,4,5-trimethoxybenzoyloxy)ethylpyrrolidine hydrochloride was performed using 2-(2-hydroxyethyl)pyrrolidine as a starting material.Before the O-acylation reaction with 3,4,5-trimethoxybenzoyl chloride,the amino group was protected using benzyl chlorocarbonate.The removal of the blocking group was carried out in modified conditions,avoiding the alcoholysis of the ester bond.The final product was separated from its structural isomer by precipitation as its hydrochloride salt.Some steps of the synthesis were controlled by GC-MS.The identification of the respective compounds was performed by mass spectra analyses and confirmed by ~1H NMR,~(13)C NMR,IR and elemental analyses.