中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-甲基色原酮 | 2-methylchromone | 5751-48-4 | C10H8O2 | 160.172 |
2-碘甲基色烯-4-酮 | 2-iodomethylchromen-4-one | 120045-72-9 | C10H7IO2 | 286.069 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
色酮-2-甲醛 | 2-formylchromone | 65160-21-6 | C10H6O3 | 174.156 |
—— | 2-cyanochromone | 33543-90-7 | C10H5NO2 | 171.155 |
色酮-2-甲酸 | acide chromone carboxylique-2 | 4940-39-0 | C10H6O4 | 190.155 |
Substituted derivatives of 2- and 3-formylchromone were synthesized and studied by IR, 13C and 1H NMR spectroscopy and the AM1 quantum chemical method. Energy and electron distribution calculations confirm the preference of the synplanar conformation in 3-formylchromones. The calculated charges on the carbon atoms correlate well with the experimental 13C chemical shifts. Substituents bonded to the aromatic nucleus have only small effect on the electron structure of the pyrone ring.