Effect of Microwave Irradiation on the Catalytic Activity of Palladium Supported Catalysts in the One-Step Isomerisation of Cinchona Alkaloids to Δ3,10-Isobases
作者:Teodozja M. Lipińska、Dominika Borowska、Natalia Swędra、Katarzyna Trochim
DOI:10.1007/s10562-017-2169-3
日期:2017.11
(Al2O3, C or BaSO4), reaction time and temperature. Very good results: high yields and purity of (Z/E) Δ3,10-isomers were obtained from quinine and quinidine with 10% Pd/BaSO4 as the catalyst, which is less effective for isomerisation of cinchonine and cinchonidine. Enhancing energy efficiency can be possible when the responsive support selective absorbs of microwave energy, which is translated to the
已在绿色介质(50% 乙醇水溶液或乙二醇与 HCl)中在受控微波加热下探索了钯固体负载 (Pd/SS) 催化剂对四种天然金鸡纳生物碱侧链一步异构化的效率。通过TLC和1H NMR光谱法监测转化进程和产物纯度。最终转化率取决于载体(Al2O3、C 或 BaSO4)、反应时间和温度。非常好的结果:以 10% Pd/BaSO4 作为催化剂,从奎宁和奎尼丁中获得高产率和纯度的 (Z/E) Δ3,10-异构体,这对辛可宁和辛可尼丁的异构化效果较差。当响应支持选择性吸收微波能量时,可以提高能量效率,