Reaction-phase-selective inter- and intramolecular photochemical reaction of 2-pyridone derivatives.
Phase-selective photochemical reaction of 2-pyridone derivatives was examined. Irradiation of 1 in benzene mainly gave rearrangement products 2. However, intermolecular [4 + 4] photocycloaddition proceeded quantitatively in the solid state, affording photodimers 3. An effective pi-pi stacking and dipole-dipole interaction between two pyridone moieties might play important roles in an effective arrangement of 1 for photodimerization in their crystal structures. [reaction: see text]
Kohmoto
Shigeo
S
Department of Materials Technology, Faculty of Engineering and Chemical Analysis Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan. kohmoto@faculty.chiba-u.jp
Noguchi
Takao
T
Masu
Hyuma
H
Kishikawa
Keiki
K
Yamamoto
Makoto
M
Yamaguchi
Kentaro
K