Diastereoselectivity in the intermolecular Pauson-Khand reaction of chiral 2-alkynoates
作者:Sílvia Fonquerna、Albert Moyano、Miquel A. Pericàs、Antoni Riera
DOI:10.1016/0040-4020(95)00152-x
日期:1995.4
with olefins to afford the corresponding Pauson-Khand cyclopentenone adducts in good yields, with high regioselectivity, and with variable degrees of diastereoselectivity. In some instances, the degree of stereocontrol is superior to that observed for alkoxyacetylenes, so that the viability of an enantioselective approach to the intermolecular Pauson-Khand reaction of electron-deficient alkynes is demonstrated
通过使几种基于环己基或樟脑的醇与2-链烷酸或相应的酰氯缩合,可以容易地制备手性2-链烷酸酯。由此获得的六羰基二钴配合物与烯烃反应,以高收率,高区域选择性和非对映选择性的不同程度提供相应的Pauson-Khand环戊烯酮加合物。在某些情况下,立体控制程度优于烷氧基乙炔,因此首次证明了对电子缺陷型炔烃的分子间Pauson-Khand反应的对映选择性方法的可行性。