6338-89-2Relevant 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.
A New Synthesis of 3-Nitro-4H-pyran-4-ones from Acetylenic β-Diketones
Marei, Mohamed Gaber,El-Kholy, Ibrahim El-Sayed,Mishrikey, Morcos Michael
, p. 370 - 372 (2007/10/02)
A new method for the synthesis of 3-nitro-4H-pyran-4-ones is described involving nitration of acetylenic β-diketones.The 3-nitropyrones are converted into the corresponding 4-thiones which afford the respective 3-nitrooximes and N-methyl-4-thiopyridones o
Synthesis and Reactions of 3-Iodo-4H-pyran-4-ones
Marei, Mohamed Gaber,Mishrikey, Morcos Michael,El-Kholy, Ibrahim El-Sayed
, p. 1849 - 1852 (2007/10/02)
3-Iodo-4H-pyran-4-ones have been synthesized in excellent yield by the reaction of acetylenic β-diketones with iodine monochloride and were converted into the corresponding 4H-pyran-4-thiones.The iodopyrones and thiopyrones gave with methylamine the respe
