Electronic structure and conformational flexibility of 1,2-dihydropyridine, 1,2- and 1,6-dihydropyrimidines, and their ylide derivatives
โ Scribed by O. V. Shishkin
- Book ID
- 112540065
- Publisher
- Springer
- Year
- 1996
- Tongue
- English
- Weight
- 384 KB
- Volume
- 45
- Category
- Article
- ISSN
- 1573-9171
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๐ SIMILAR VOLUMES
large strong-field increment for 2-CH~ was observed here, and the chemical shift for this carbon atom is 14.5 ppm, whereas it was more than 19.8 ppm in all other cases. A "~ effect" in this case is clearly observed not only for C(s ) but also for C(~) and C(6 ) (Table 3). The substantial dependence
N.Aryl.f-methyl-~-alanines were synthesized by the reaction of aromatic amines with crotonic acid. The products were converted to dihydropyrimidine-2,4-dione derivatives. Alkylation, acylation, and oximation of l-arylpyrimidine-2,4-diones were carried out. Conformational analysis of the compounds ob