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Spiropyrans and spirooxazines 5. Synthesis of photochromic 8-(4,5-diphenyl-1,3-oxazol-2-y1)-substituted spiro[indoline-benzopyrans]

✍ Scribed by N. A. Voloshin; E. B. Gaeva; A. V. Chernyshev; A. V. Metelitsa; V. I. Minkin


Publisher
Springer
Year
2009
Tongue
English
Weight
334 KB
Volume
58
Category
Article
ISSN
1573-9171

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✍ David W. Emerson; Richard L. Titus; Marlon D. Jones 📂 Article 📅 1998 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 625 KB

## Abstract Reaction of 2‐oxocylalkaneglyoxylate esters with __N__‐phenylmethyleneaniline yields spiro compounds such as 2‐aza‐3,4,6,‐trioxo‐1,2‐diphenylspiro[4.4]nonane 4 and cycloalkane‐2‐aza‐3,4,6‐trioxo‐1,2‐diphenylspiro‐[4.5]decanes 5–7. These undergo solvolytic opening of the the oxocycloalka