Synthesis, structures, and properties of spiro[6-azaperimidine-2,4′-cyclohexa-2′,5′-dien]-1′-one derivatives
✍ Scribed by V. N. Komissarov; E. N. Gruzdeva; L. P. Olekhnovich; G. S. Borodkin; V. N. Khrustalev; S. V. Lindeman; Yu. T. Struchkov; V. A. Kogan; V. I. Minkin
- Publisher
- Springer
- Year
- 1997
- Tongue
- English
- Weight
- 539 KB
- Volume
- 46
- Category
- Article
- ISSN
- 1573-9171
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## Abstract For Abstract see ChemInform Abstract in Full Text.
## 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 Regioselective 1,3‐dipolar cycloaddition of nitrilimines (generated in situ from dehydrohalogenation of the corresponding hydrazonoyl halides by the action of triethylamine) with 4‐arylidene‐1‐aryl‐2‐phenyl‐1__H__‐imidazol‐5(4__H__)‐one **3** afforded the corresponding spiro[4,4]nona‐2,
The anodic methoxylation cd':, series of alkylbiphenyls (2-, 3-, 4-methylbiphenyl, 3,3'-, 4,4'-dimethylhiphenyl, 4-ethylbiphenyl and 4,4'-di-tea-butylhiphenyl) carried out under constant current intensity afforded, in a process of two electrons, a number of ci.s/trum cyclohexa-l,4-dienes and, in a p
Photolysis of benzo[a]spiro [2,5]octa-1,4-dien-3-one derivative 8a afforded spiro-fused tetracycles 10 as a pair of diastereomers in 1.7:1 ratio. The photochemical process occurred by cycloaddition of the intermediate-sulfone stabilized biradical 9 to the tethered olefin. Photolysis of dienone 8b ga