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Updated: Aug 11, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
Enantioselective intramolecular aromatic [4 + 4] photocycloaddition in crystalline state: parameters for reactivity
1Department of Materials Technology, Faculty of Engineering and Chemical Analysis Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
Abstract:
Photoreactivity of seven 9-anthryl-N-(naphthylcarbonyl)carboxamide derivatives, 1a-g, in their intramolecular [4 + 4] photocycloadditions in solid state is discussed on the basis of their single-crystal X-ray analyses. The distances (d(1) and d(2)) between the two carbon atoms to be reacted, the angles (theta(1) and theta(2)), and the torsion angle (theta(3)) between the anthracene and naphthalene rings were chosen as structural parameters for reactivity. For 1a and 1e, the first example of absolute asymmetric synthesis in [4 + 4] photocycloaddition was attained. [reaction: see text]
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