Journal of the Chemical Society. Chemical communications p. 2713 - 2714 (1994)
Update date:2022-08-02
Topics:
Heller, Harry G.
Hughes, David S.
Hursthouse, Michael B.
Koh, Kevin V. S.
The title photochromic compounds 4 photocyclise to thermally stable blue and infrared active 7-dicyanomethylene-5-oxo-5,7,8,8a-tetrahydro-2-substituted-4,8a-dimethylfuro<3,4-f>benzofurans or benzothiophenes 5 which absorb at longer wavelength (> 100 nm) than the photocyclised compounds 2 from the corresponding photochromic fulgides 1.
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