50482-91-2Relevant academic research and scientific papers
Product Selectivity in Solar photocatalytic dehydrazonation of aromatic hydrazones by Tio2-based catalysts
Krishnakumar,Swaminathan
, p. 96 - 100 (2014)
Product selectivity of ketone and azine in the photocatalytic dehydrazonation of aromatic hydrazones with TiO2-based photocatalysts has been investigated using solar light. Product selectivity is dependent on the nature of the photocatalysts, substituents and the solvents. Loading of metals on TiO2-P25 selectively enhances the formation of azine from benzophenone hydrazone. Solvents such as dichloromethane, chloroform, ethanol, and 2-propanol enhance the formation of azine under solar irradiation. Structures of products have been established by FT-IR, 1H-NMR, 13C-NMR, and GC-MS spectrometry. Supplementary materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file. Copyright Taylor &Francis Group, LLC.
Monochromatic Light-induced Reactions of Benzophenone Hudrazones and the N-Acetyl Derivatives in Carbon Tetrachloride in the Presence of Oxygen
Suginome, Hiroshi,Uchida, Tsutomu
, p. 3225 - 3231 (2007/10/02)
Irradiation of hydrazones of benzophenone, 4-methylbenzophenone and 4-methoxybenzophenone in carbon tetrachloride with monochromatic light in the presence of oxygen afforded the corresponding azine, resulting from N-N bond cleavage, as the major product together with the hydrazone hydrochloride.In contrast to the hydrazones, benzophenone acetylhydrazone in carbon tetrachloride in the presence of oxygen afforded an unstalbe hydroperoxide as the only product, on photolysis with monochromatic light (288 +/- 8 nm); this product was transformed spontaneously into benzophenone on evaporation of the solvent at room temperature. 4-Methylbenzophenone acetylhydrazone and 4-methoxybenzophenone acetylhydrazone reacted in a manner similar to benzophenone acetylhydrazone.Irradiation of benzophenone diacetylhydrazone with 266 +/- 8 nm light under conditions analogous to the photo-reactions of hydrazones and acetylhydrazones resulted in loss of an acetyl group, resulting in N-CO bond cleavage to afford acetylhydrazone.The mechanism of the photooxygenation of benzophenone acetylhydrazones is interpreted in terms of chlorine radical-induced autoxidation.
