Selective removal of 2,2,2-trichloroethyl- and 2,2,2-trichloroethoxycarbonyl protecting groups with Zn–N-methylimidazole in the presence of reducible and acid-sensitive functionalities
作者:László Somsák、Katalin Czifrák、Edit Veres
DOI:10.1016/j.tetlet.2004.10.026
日期:2004.11
Activated zinc dust in the presence of N-methylimidazole in ethyl acetate or acetone at reflux or room temperature removes 2,2,2-trichloroethyl- and 2,2,2-trichloroethoxycarbonyl protecting groups while azido-, nitro-, chloro-, phenacyl-, and tert-butyl ester functionalities as well as double bonds remain intact.
在乙酸乙酯或丙酮中,在回流或室温下,在N-甲基咪唑存在下,活化的锌粉除去2,2,2-三氯乙基和2,2,2-三氯乙氧基羰基保护基,而叠氮基,硝基,氯,苯甲酰基-和叔-丁酯官能团以及双键保持完整。