Chemoselective Deprotection of Aryl <i>tert</i>-Butyldimethylsilyl Ethers Promoted by Phosphates
作者:Lin Yan、Fangli Zhao、Yin Gan、Jin Zhao、Zhiyong Jiang
DOI:10.1080/00397911.2010.523859
日期:2012.1.15
Abstract A facile protocol to the chemoselective deprotection of aryl t-butyldimethylsilyl (TBDMS) ethers using Na3PO4 · 12H2O as promoter is described. From aryl TBDMS ethers to the corresponding phenols, the TBDMS group could be cleaved in the presence of 0.5 equivalent of Na3PO4 · 12H2O in dimethylformamide at room temperature with good to excellent yields in the presence of other common protecting
摘要 描述了使用 Na3PO4·12H2O 作为促进剂对芳基叔丁基二甲基甲硅烷基 (TBDMS) 醚进行化学选择性脱保护的简便方案。从芳基 TBDMS 醚到相应的酚类,在室温下,在二甲基甲酰胺中存在 0.5 当量 Na3PO4·12H2O 的情况下,TBDMS 基团可以被裂解,在其他常见保护基团和官能团存在的情况下,收率良好至极好。还发现 K3PO4·3H2O 可用于选择性脱保护反应。据我们所知,这是使用磷酸盐对芳基 TBDMS 醚进行化学选择性脱保护的第一份报告。图形概要