作者:Pierluigi Plastina、Bartolo Gabriele、Giuseppe Salerno
DOI:10.1055/s-2007-983828
日期:2007.10
Alkynols undergo palladium-catalyzed aminocarbonylation leading to the direct formation of different heterocyclic derivatives, depending on the position of the OH group with respect to the triple bond. In the cases of 4-yn-1-ols and (Z)-2-en-4-yn-1-ols, the initially formed 2-ynamide intermediates, respectively, undergo cyclization leading to tetrahydrofuran derivatives or 2-furan-2-ylacetamides, respectively. In the case of 2-yn-1-ols, the aminocarbonylation products undergo intermolecular conjugate addition, followed by lactonization, leading to aminofuranones.
炔醇在钯催化下进行氨基羰基化反应,根据羟基相对于三键的位置,可以直接形成不同的杂环衍生物。对于4-炔-1-醇和(Z)-2-烯-4-炔-1-醇,初始形成的2-炔酰胺中间体分别经历环化反应,分别生成四氢呋喃衍生物或2-呋喃-2-基乙酰胺。对于2-炔-1-醇,氨基羰基化产物经历分子间的共轭加成,随后进行内酯化,生成氨基呋喃酮。