Author/Authors :
Yokoyama، Yasushi نويسنده , , Yokoyama، Yayoi نويسنده , , Nakamura، Shinichiro نويسنده , , Kurimoto، Yuko نويسنده , , Saito، Yasuyo نويسنده , , Katsurada، Manabu نويسنده , , Okada، Itaru نويسنده , , Osano، Yasuko T. نويسنده , , Sasaki، Chizuko نويسنده , , Tukada، Hideyuki نويسنده , , Adachi، Masafumi نويسنده , , Murayama، Tetsuo نويسنده , , Harazono، Toshie نويسنده , , Kodaira، Tetsuya نويسنده ,
Abstract :
Ethyl 4-formyl-1,3-dimethylpyrazole-5-carboxylate showed coloration upon 366-nm light irradiation in the solid state at room temperature. The red color disappeared either by melting or dissolving into solvents. The initiation of coloration is most likely based on a photochemical intramolecular hydrogen abstraction by the formyl oxygen from the methyl group on C-3. It also exhibited coloration in 2-methyltetrahydrofuran matrix at low temperature.
Keywords :
Power requirement , Surface finish , prediction , grinding , Genetic-fuzzy system , Application-production research
