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2005
Pyrrole derivatives
R 0120
Photochromic Properties of Diarylethene Maleimide Derivatives in Polar Sol— Diarylmaleimide derivatives (III) bearing methoxy, phenyl or cyano group as
13- 117 vents.
a nitrogen substituent are synthesized in an attempt to prepare photochromic compounds which exhibit photochromic reactivity even in polar solvents. Whereas the
derivatives having methoxy or phenyl group do not undergo photochromism in polar
solvents, derivatives (IIIa) and (IIIb) having a cyano moiety show photochromism even
in solvents such as acetonitrile. — (YAMAGUCHI*, T.; IRIE, M.; Chem. Lett. 33
(2004) 10, 1398-1399; Chem. Text. Ind., Fukuoka Ind. Technol. Cent., Chikushino,
Fukuoka 818, Japan; Eng.) — M. Paetzel
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