Gold-Catalyzed Diastereoselective Formal Intermolecular [4 + 2 + 1] Cycloaddition of 1,3-Dien-8-yne with Diazo Ester
作者:Yu-Jiang Wang、Xiao-Xiao Li、Zili Chen
DOI:10.1021/acs.joc.0c00146
日期:2020.6.19
example of gold-catalyzed formal intermolecular [4 + 2 + 1] cycloaddition was developed using 1,3-dien-8-yne as C4 and C2 units and diazo ester as the C1 unit, which provides expedient access to a series of structurally complicated [5.3.0] bicyclic adducts in moderate yields with moderate to high diastereoselectivities. The key route involved a cascade process of dienyne cycloisomerization, cyclopropyl
金催化形式的分子间[4 + 2 + 1]环加成反应的第一个例子是使用1,3-dien-8-yne作为C4和C2单元以及将重氮酯作为C1单元开发的,该方法可方便地访问一系列结构复杂的[5.3.0]双环加合物,具有中等至高非对映选择性的中等收率。关键途径涉及二烯炔环异构化,环丙基金卡宾的捕集以及随后的二乙烯基环丙烷(DVCP)Cope重排的级联过程。