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Chemical properties of ylidene derivatives of azines. 5. Bromination of dihydropyridylidene- and dihydropyrimidinylidenecyanoacetic esters

โœ Scribed by I. V. Oleinik; O. A. Zagulyaeva; O. A. Grigorkina; V. P. Mamaev

Book ID
104781367
Publisher
Springer US
Year
1991
Tongue
English
Weight
612 KB
Volume
27
Category
Article
ISSN
0009-3122

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Chemical properties of ylidene derivativ
Chemical properties of ylidene derivatives of azines. 4. Structures of the products of protonation and transformation of dihydroazinylidenecyanoacetic esters in concentrated sulfuric acid
โœ I. V. Oleinik; O. A. Zagulyaeva; A. Yu. Denisov; V. P. Mamaev ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› Springer US ๐ŸŒ English โš– 582 KB

It was demonstrated by UV and 13C NMR spectroscopy that in concentrated sulfuric acid ylidene derivatives of dihydropyridine (Ia) and dihydropyridazine (lla) have aromatic structures Ib and lIb, while derivatives of dihydropyrimidines Ilia and IVa, dihydropyrazine Va, and dihydro-s-triazine Via reta