Photocyclization reaction of a diarylmaleimide derivative in polar solvents

Authors:
Publisher website
Google Scholar
Abstract
Photochromism of a symmetric diarylmaleimide derivative, having two thiophene rings (1), and a non-symmetric derivative having a S,S-dioxide thiophene ring and a thiophene ring (2) as the aryl moieties, was studied in various solvents. The photocyclization quantum yield of 1 gradually decreased with increasing the solvent polarity and the reaction was not observed in polar solvents, such as ethanol and acetonitrile; on the other hand, such a strong solvent dependence of the photocyclization reaction was not observed for 2; the different behavior is attributed to the weaker electron donating ability of the S,S-dioxide thiophene ring.

This publication has 26 references indexed in Scilit: