Stereoselective Michael-Type Addition of Organocopper Reagents to Enones Derived from Glycals in the Synthesis of 2-Phosphono-α-C-Glycosides
作者:Francesca Leonelli、Marinella Capuzzi、Vincenzo Calcagno、Pietro Passacantilli、Giovanni Piancatelli
DOI:10.1002/ejoc.200500149
日期:2005.7
Michael-type additions of various organocopper reagents to the novel carbohydrate-derived 2-(diethoxyphosphoryl)hex-1-en-3-uloses are described. The reactions have proved to be rapid, clean and stereoselective, giving rise to the formation of 3-oxo-2-phosphono-α-C-glycosides or the corresponding enol acetates. These compounds are direct precursors of 2-phosphono-α-C-glycosides, a very interesting class
描述了将各种有机铜试剂添加到新型碳水化合物衍生的 2-(二乙氧基磷酰基)hex-1-en-3-uloses 中的迈克尔型添加。该反应已被证明是快速、清洁和立体选择性的,导致形成 3-oxo-2-phosphono-α-C-糖苷或相应的烯醇乙酸酯。这些化合物是 2-膦酰基-α-C-糖苷的直接前体,这是一类以前从未描述过的非常有趣的分子。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)