Palladium-Catalyzed Alkoxycarbonylation of Conjugated Enyne Oxiranes: A Diastereoselective Method for the Synthesis of 7-Hydroxy-2,3,5-trienoates
作者:Melih Kuş、Levent Artok、Muhittin Aygün
DOI:10.1021/acs.joc.5b00382
日期:2015.6.5
Palladium-catalyzed alkoxycarbonylative 1,5-substitution of conjugated enyne oxiranes provides a diastereoselective route to (E)-configured 7-hydroxy-2,3,5-trienoates. The reactions proceeded in a highly stereoselective manner, possibly through sequential formation of π-allylpalladium and σ-vinylallenyl palladium complexes. The major diastereomeric form of the product is determined by the configuration
钯催化的共轭烯炔环氧乙烷的烷氧基羰基化1,5-取代为(E)-构型的7-羟基-2,3,5-三烯酸酯提供了非对映选择性的途径。该反应以高度立体选择性的方式进行,可能通过依次形成π-烯丙基钯和σ-乙烯基烯基钯配合物来进行。产物的主要非对映异构形式由底物的烯基部分的构型确定。