Structure of Fulgide

4-Oxazolyl (64), 4-pyrazolyl (65), 4-thiazolyl (66), and 4-isoxazolyl (67)-substituted fulgides have been prepared and their photochromic reactions investigated by several groups. The absorption spectra data and quantum yields of their photoreactions are listed in Table 4.19. 

Matsushima et al.68 studied the photochromic properties of fulgides 65, 66, and 67. Their results showed that fulgides 65 and 66 possess an excellent fatigue 

FULGIMIDE, ISOFULGIMIDE, FULGENATE, FULGENOID, AND DICYANOMETHYLENE DERIVATIVES OF FULGIDES 

A wide range of aryl and heterocyclic fulgimides with structure 5 have been prepared. Their overall yields and melting points are summarized in Table 4.20. 

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