Mild and Efficient Lewis Acid-Promoted Detritylation in the Synthesis of <i>N</i>-Hydroxy Amides: A Concise Synthesis of (−)-Cobactin T
作者:Shyh-Ming Yang、Bharat Lagu、Lawrence J. Wilson
DOI:10.1021/jo701411d
日期:2007.10.1
Lewis acid promoted deprotection of O-trityl hydroxylamine derivatives is described. A range of acid-labile protecting groups, such as N-Boc and O-TBS, were tolerated under these mild conditions. The present method is applicable to the synthesis of a broad range of hydroxylamine derivatives, including N-hydroxy amides (hydroxamic acids), N-hydroxy sulfonamides, and N-hydroxy ureas, which often exhibit
描述了有效的,高产率的路易斯酸促进的O-三苯甲基羟胺衍生物的脱保护。在这些温和条件下,可以耐受一系列酸不稳定的保护基,例如N -Boc和O -TBS。本方法适用于广泛的羟胺衍生物的合成,包括通常表现出显着生物学活性的N-羟基酰胺(异羟肟酸),N-羟基磺酰胺和N-羟基脲。还演示了该方法在简明合成(-)-Cobactin T(18)中的应用。