A mild and chemoselective method for the deprotection of tert-butyldimethylsilyl (TBDMS) ethers using iron(III) tosylate as a catalyst
作者:Jason M. Bothwell、Veronica V. Angeles、James P. Carolan、Margaret E. Olson、Ram S. Mohan
DOI:10.1016/j.tetlet.2009.12.076
日期:2010.2
TBDMS ethers utilizes stoichiometric amounts of tetrabutylammonium fluoride, n-Bu4N+F− (TBAF), which is highly corrosive and toxic. We have developed a mild and chemoselective method for the deprotection of TBDMS, TES, and TIPS ethers using iron(III) tosylate as a catalyst. Phenolic TBDMS ethers, TBDPS ethers and the BOC group are not affected under these conditions. Iron(III) tosylate is an inexpensive
为TBDMS醚脱保护的最常见的方法是利用化学计量的量的四丁基氟化铵,Ñ -Bu 4 Ñ + ˚F -(TBAF),这是高度腐蚀性和毒性。我们已经开发了一种温和的化学选择性方法,可使用甲苯磺酸铁(III)作为催化剂对TBDMS,TES和TIPS醚进行脱保护。在这些条件下,不影响酚类TBDMS醚,TBDPS醚和BOC基团。甲苯磺酸铁(III)是一种便宜的,市售的,无腐蚀性的试剂。