Reaction of Paeoniflorin with Lower Alcohols in the Presence of Cation Exchanger
作者:L. A. Baltina、E. R. Shabieva、R. M. Kondratenko、L. V. Spirikhin、L. A. Baltina
DOI:10.1007/s10600-017-2148-3
日期:2017.9
The reaction of paeoniflorin (PF) with refluxing MeOH in the presence of cation exchanger KU-2-8 (H+) formed a mixture of the 4-O-methyl- and 4-oxo-9-O-methyl ethers (1:1, overall yield 90%) that were separated by chromatography over silica gel. The reaction of PF with EtOH and BuOH under analogous conditions also formed mixtures of the ethyl and butyl ethers from which 4-oxo-9-O-ethyl(butyl) ethers were isolated as the tetra-O-acetates. The structures of the obtained compounds were confirmed using PMR and 13C NMR spectra.