25551-92-2Relevant academic research and scientific papers
Thermal addition reaction of aroylketene with 1-aryl-1- trimethylsilyloxyethylenes: Aromatic substituent effects of aroylketene and aryltrimethylsilyloxyethylene on their reactivity
Saitoh,Oyama,Sakurai,Niimura,Hinata,Horiguchi,Toda,Sano
, p. 956 - 966 (2007/10/03)
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.
Synthesis of 5-substituted-1-phenylpent-1-yne-3,5-diones and its derivatives
Marei, Mohamed Gaber,El-Ghanam, Moneim
, p. 318 - 321 (2007/10/02)
The title compounds acetylenic β-diketones (4) have been synthesized by the condensation of ethyl phenylpropiolate (1) with ketones 2a, b in the presence of sodium ethoxide, and converted into the corresponding 4H-pyran-4-ones (5a, b) and 3(2H)-furanone (6a) derivatives. 2-Pyrazoline (8a) and 5-pyridazinol (9a), 2-isoxazoline (10a) and isoxazole (11a), and 6-thiathiophthene (12a) derivatives have also been prepared from 5-(α-furyl)-1-phenylpent-1-yne-3,5-dione (4a) by treatment with hydrazine hydrate, hydroxylamine, and phosphorus pentasulphide, respectively.Thestructures of all the compounds have been established by their elemental analyses and spectral data.
Synthesis and Reactions of 1-Heteroaryl-5-phenyl-4-pentyne-1,3-diones
Marei, Mohamed Gaber,El-Ghanam, Moneim
, p. 3509 - 3511 (2007/10/02)
The synthesis of the title acetylenic β-diketones which are starting materials to prepare cyclic and bicyclic compounds is described.
