Thermally stable fatigue resistant near infrared active photochromic compounds, exemplified by 6-amino-7-cyano-3-(dicyclopropylmethylene)-4-(2,5-dimethyl-3-furyl)-benzofuran-2(3H)-one
- 7 July 2000
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 15,p. 1397-1398
- https://doi.org/10.1039/b003496g
Abstract
The title pale yellow photochromic compound 11b in toluene, on irradiation at 366 nm, cyclises to the thermally stable infrared active blue–green photochrome, 8-amino-7-cyano-4,4-dicyclopropyl-3a,4-dihydro-6-hydroxy-2,3a-dimethylnaph tho[2,1-b]furan-5,6-carbolactone, 12b which has a λmax value of 720 nm for its broad long wavelength absorption band.Keywords
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