A new synthesis of 3(2<i>H</i>)-furanones from acetylenic β-diketones
作者:Ibrahim El-Sayed El-Kholy、Morcos Michael Mishrikey、Mohamed Gaber Marei
DOI:10.1002/jhet.5570190633
日期:1982.11
Thermal cyclization of 1,5-diarylpent-1-yne-3,5-diones led to the formation of 2-benzyliden-5-aryl-3(2H) furanones as well as 2,6-diaryl-4H-pyran-4-ones as minor products. The structure of the furanones was established from their ir, 1H nmr and mass spectral data. Their reaction with hydrazine hydrate gave pyrazole derivatives.
1,5-二芳基戊-1-炔-3,5-二酮的热环化导致形成2-苄叉基-5-芳基-3(2 H)呋喃酮以及2,6-二芳基-4 H-吡喃-4-ones作为次要产品。呋喃酮的结构由其ir,1 H nmr和质谱数据确定。它们与水合肼反应,得到吡唑衍生物。
Gold-Catalyzed Oxidative Cyclization Involving Nucleophilic Attack to the Keto Group of α,α′-Dioxo Gold Carbene and 1,2-Alkynyl Migration: Synthesis of Furan-3-carboxylates
作者:Ali Wang、Mingduo Lu、Yuanhong Liu
DOI:10.1021/acs.orglett.1c02389
日期:2021.9.3
for the synthesis of functionalized furan-3-carboxylates based on gold-catalyzed oxidative cyclization of diynones with alcohols or water has been developed. Mechanisticstudies revealed that a rare nucleophilic attack to the carbonyl group of the α,α′-dioxo gold carbene instead of the carbene center and 1,2-alkynyl group migration were involved in this transformation. This method offers several advantages