Synthesis and Photochromic Properties of 2 H ,9 H -Indeno[1,2- f ]- and 3 H ,7 H -Indeno[2,1- i ]- naphtho[2,1- b ]pyrans
β Scribed by Gabbutt, Christopher D.; Heron, B. Mark; Mars, Craig A.; Partington, Steven M.
- Book ID
- 118055981
- Publisher
- Taylor and Francis Group
- Year
- 2005
- Tongue
- English
- Weight
- 149 KB
- Volume
- 430
- Category
- Article
- ISSN
- 1542-1406
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## Abstract magnified image Treatment of methyl propiolate and 2β(thiophenβ2βyl)benzaldehyde, 2β(thiophenβ3βyl)benzaldehyde or 2β(furanβ3βyl)benzaldehyde with tetrabutylammonium iodide/zirconium (IV) chloride or treatment of methyl acrylate and the same aldehydes with 1,4βdiazabicyclo[2,2,2]octane
## Abstract magnified image Naphtho[2,1β__b__]pyran nuclei are prevalent in natural products with significant biological and medicinal properties. 3,3βDisubstituted 3__H__βnaphtho[2,1__βb__]pyrans are photochromic and find use in electronic display systems, ophthalmic lenses, optical switches, and