## Abstract magnified image Naphtho[2,1โ__b__]pyran nuclei are prevalent in natural products with significant biological and medicinal properties. 3,3โDisubstituted 3__H__โnaphtho[2,1__โb__]pyrans are photochromic and find use in electronic display systems, ophthalmic lenses, optical switches, and
Laser induced photochromic mechanism of 3-phenyl-3-[1,2-dimethylindol-3-YL]-3H-naphtho[2,1-B]pyran
โ Scribed by Gui -Lan Pan; Jing -Qiang Wei; Ping Fan; Ai -Ping Zhu; Yang -Fu Ming; M. -G. Fan; S. D. Yao
- Book ID
- 111759482
- Publisher
- Springer Netherlands
- Year
- 2000
- Tongue
- English
- Weight
- 341 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0922-6168
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๐ SIMILAR VOLUMES
Synthetic accesses to formylated photochromic 3,3-diphenyl-[3H]-naphthopyrans (or 2/-/benzochromenes) are developed through classical cyclization between appropriate hydroxynaphthaldehydes and l,l-diphenylpropyne-l-ol and also via substituent Wansfonnations on the naphthopyran skeleton including bro
The title compound, C~21~H~16~N~2~O~5~, was synthesized by the reaction of 2-naphthol with methyl cyanoacetate and 3-nitrobenzaldehyde in ethanol under microwave irradiation. The pyran ring adopts a boat conformation.