$TiO_2$-Mediated Photoreactions of Cinnamic Acid and Related Compounds in Methanol

  • Kim, Sung-Sik (Department of Chemistry, Chonbuk National University) ;
  • Kim, Hyun-Jin (Department of Chemistry, Chonbuk National University) ;
  • Lee, Hye-Jong (Department of Chemistry, Chonbuk National University) ;
  • Park, Sang-Kyu (Department of Chemistry, Chonbuk National University)
  • 발행 : 2003.08.01

초록

Photochemical reactions of some organic molecules on titanium dioxide were investigated in methanol. A methanolic solution of trans-cinnamic acid and titanium dioxide was irradiated with 300 nm UV lamps for 24 h to afford methyl cinnamate. In the case of trans-cinnamamide, the major product was found to be 3-phenylpropionamide, i.e., a saturation product of ethylenic double bond. However, irradiation of urocanic acid, caffeic acid, ethyl cinnamate, trans-chalcone, trans-cinnamonitrile, trans-stilbene or trans, trans-1,4-diphenyl-1,3-butadiene on titanium dioxide under the same conditions did not give any noticeable products. Meanwhile, when irradiated some aromatic aldehydes, such as trans-cinnamaldehyde, l-naphthaldehyde, and 2-naphthaldehyde in methanol, vicinal diols and alcohols derived from the diols were produced. On the other hand, irradiation of 9-anthraldehyde and titanium dioxide in methanol afforded only alcohols, in which diol was not observed.

키워드

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