A new furan annelation reaction by the palladium-catalyzed reaction of 2-alkynyl carbonates or 2-(1-alkynyl)oxiranes with β-keto esters
作者:Ichiro Minami、Masami Yuhara、Hiroyuki Watanabe、Jiro Tsuji
DOI:10.1016/0022-328x(87)80052-9
日期:1987.11
A new furan annelation by the palladium-catalyzed reaction of 2-alkynyl carbonates with β-keto esters is described. The reaction proceeds under mild neutral conditions and hence unstable 3-alkylidene-2,3-dihydrofurans can be prepared in this way. Similarly, reaction of 2-(1-alkynyl)oxiranes with β-keto esters gives alkylidene furans.
描述了通过碳酸2-炔基碳酸酯与β-酮酯的钯催化反应的新的呋喃脱嵌。反应在温和的中性条件下进行,因此可以以这种方式制备不稳定的3-亚烷基-2,3-二氢呋喃。类似地,使2-(1-炔基)氧杂环戊烷与β-酮酯反应,得到亚烷基呋喃。