## Abstract For Abstract see ChemInform Abstract in Full Text.
Spiro[1,3-benzoxathiepin-4(5H),1′-cyclohexa[2,4]diene]-2,2′-dione, a Novel Heterocyclic Ring System
✍ Scribed by Sandra Kolly; Hansrudolf Meier; Tammo Winkler
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- German
- Weight
- 284 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0018-019X
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📜 SIMILAR VOLUMES
## Dedicated to the memory of Mrs. Ada Castle The ring transformation of 2,4,6-triarylpyrylium salts 1 with 2-methyleneindolines of the type 3 in which the nitrogen atom is connected with the ortho-carbon of the benzene ring by a (CH 2 ) n chain is studied.
## Abstract Depending on the experimental conditions the spirolactone **3** on treatment with methylamine gave compounds **6, 7** or the rearranged product **4**. Compound **4** was used to prepare the title compounds **11–13, 15, 18–20** and other derivatives.
In continuation of our work on photo-and electron collision-induced reactions of thi01-l~~ and selenol-esters", 61 we have now synthesized the selenocarboxylic Se-aryl esters (2)-( 5 ) as first examples exhibiting liquid crystal properties. The positions of their carbonyl absorptions are typical for