作者:Florent Allais、Paul-Henri Ducrot
DOI:10.1055/s-0029-1218741
日期:2010.5
combination of a highly catalytic enantioselective allylboration and a highly diastereoselective allylstannation was used for the stereoselective generation of the two stereogenic centers. The pyranone ring was created in two steps through generation of a Z-configured α,β-unsaturated ester and lactonization via intramolecular transesterification. asymmetric allylation - diastereoselectivity - enantioselectivity
据报道,天然存在的二氢吡喃酮-多酮嘌呤的全合成。高催化对映选择性烯丙基硼化和高非对映选择性烯丙基锡的组合用于两个立体生成中心的立体选择性生成。通过生成Z-构型的α,β-不饱和酯并通过分子内酯交换作用进行内酯化,在两个步骤中产生了吡喃酮环。 不对称烯丙基化-非对映选择性-对映选择性-烯化-苯酚-全合成-内酯