Asymmetric Intermolecular Pauson−Khand Reactions of Unstrained Olefins: The (<i>o</i>-Dimethylamino)phenylsulfinyl Group as an Efficient Chiral Auxiliary
作者:Marta Rodríguez Rivero、Juan Carlos de la Rosa、Juan Carlos Carretero
DOI:10.1021/ja038491l
日期:2003.12.1
The first asymmetric version of intermolecular Pauson-Khand reactions of unstrained alkenes is described. Generally simple acyclic alkenes exhibit low reactivity and regioselectivity in intermolecular Pauson-Khand reactions; however, o-(dimethylamino)phenyl vinyl sulfoxide reacts under very mild conditions with a wide variety of terminal alkynes in a completely regioselective and highly stereoselective
描述了无应变烯烃的分子间 Pauson-Khand 反应的第一个不对称版本。通常,简单的无环烯烃在分子间 Pauson-Khand 反应中表现出低反应性和区域选择性;然而,邻(二甲氨基)苯基乙烯基亚砜在非常温和的条件下以完全区域选择性和高度立体选择性的方式与多种末端炔烃反应。抗生素 (-)-戊烯霉素 I 的非常短的对映选择性合成说明了所得 5-亚磺酰基-2-环戊烯酮在不对称合成中的应用。