Transannular photochemical ring closure in 1,2,5,6-tetramethylenecyclooctane. Novel synthesis of [3.3.2]propellane
✍ Scribed by Borden, Weston T.; Reich, Ieva L.; Sharpe, Leslie A.; Reich, Hans J.
- Book ID
- 127088673
- Publisher
- American Chemical Society
- Year
- 1970
- Tongue
- English
- Weight
- 276 KB
- Volume
- 92
- Category
- Article
- ISSN
- 0002-7863
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4-Hydroxy-5-phenylpyrido[3,2,1-jk]carbazol-6-ones (4, 5), which were obtained from carbazoles 1 and malonates 2 or 3, were converted to reactive intermediates such as 4-chlorides 9 or 4-tosylates 10, which gave in turn 4-azido-5-phenyl derivatives 11. 5-Alkyl-4-azides 11 were not obtained in this ma
## Abstract Reaction of 1‐amino‐3‐arylpyrido[1,2‐__a__]benzimidazole‐2,4‐dicarbonitrile **(1)** with dimethylformamide‐dimethylacetal (DMF‐DMA) gave **1**‐[__N,N__‐(dimethylaminomethylene)amino]‐3‐arylpyrido[1,2‐__a__]benzimidazole‐2,4‐dicarbonitrile **(2).** Compounds **(1)** reacted with triethyl