Thermal Addition Reaction of Aroylketene with 1-Aryl-1-trimethylsilyloxyethylenes: Aromatic Substituent Effects of Aroylketene and Aryltrimethylsilyloxyethylene on Their Reactivity.
The thermal addition reaction of various aroylketenes (C) generated by the thermolysis of 5-aryldioxofurans (A) to 1-aryl-1-trimethylsilyloxyethylenes gave 1, 5-diarylpentane-1, 3, 5-triones (D) and 2, 6-diaryl-4H-pyran-4-ones (E). The introduction of electron withdrawing substituents in the aroylketene and of electron donating substituents facilitated the addition reaction. The observed substituent effects and the reaction mechanism are interpreted in terms of molecular orbital analyses.
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。
The pyrone series. Part I. 2 : 6-Diaryl-4-pyrones
作者:Gabra Soliman、Ibrahim El-Sayed El-Kholy
DOI:10.1039/jr9540001755
日期:——
Marei, Mohamed Gaber; Mishrikey, Morcos Michael; El-Kholy, Ibrahim El-Sayed, Journal of Heterocyclic Chemistry, 1986, vol. 23, p. 1849 - 1852
作者:Marei, Mohamed Gaber、Mishrikey, Morcos Michael、El-Kholy, Ibrahim El-Sayed
DOI:——
日期:——
Marei, Mohamed Gaber; Ghonaim, Reda Ali, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1993, vol. 32, # 4, p. 418 - 421