Spiropyrans and spirooxazines. 3. Synthesis of photochromic 5′-(4,5-diphenyl-1,3-oxazol-2-yl)-spiro[indoline-2,3′-naphtho[2,3-b]pyran]
✍ Scribed by N. A. Voloshin; A. V. Chernyshev; A. V. Metelitsa; I. M. Raskita; E. N. Voloshina; V. I. Minkin
- Publisher
- Springer
- Year
- 2005
- Tongue
- English
- Weight
- 400 KB
- Volume
- 54
- Category
- Article
- ISSN
- 1573-9171
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📜 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
## a b s t r a c t The synthesis and photochromic properties of 1,3,3-trimethylspiro[indoline-2,3 0 -naphtho[2,1-b][1,4]oxazin]-6 0 -amine, a novel red-colouring photochromic spirooxazine and derivatives is reported. The synthesis proceeds via an unusual one-pot transamination, oxime formation, N-O