中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,4,6-三甲氧基苯乙酮 | 1-(2,4,6-trimethoxyphenyl)ethanone | 832-58-6 | C11H14O4 | 210.23 |
2-羟基-4,6-二甲氧基苯乙酮 | 2-hydroxy-4,6-dimethoxyacetophenone | 90-24-4 | C10H12O4 | 196.203 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-hydroxy-7-methoxy-chroman-4-one | 99059-10-6 | C10H10O4 | 194.187 |
5,7-二羟基苯并二氢吡喃-4-酮 | 5,7-dihydroxychroman-4-one | 108085-46-7 | C9H8O4 | 180.16 |
—— | 5,7-dimethoxy-3-(4-methoxybenzyl)chroman-4-one | 246244-10-0 | C19H20O5 | 328.365 |
—— | 5,7-dimethoxy-3-(4-hydroxybenzyl)chroman-4-one | —— | C18H18O5 | 314.338 |
—— | (±)-portulacanone A | 1392217-69-4 | C18H18O5 | 314.338 |
—— | oleracone C | —— | C17H16O5 | 300.311 |
—— | 3,5,7-Trimethoxy-2,3-dihydrochromen-4-one | 82366-84-5 | C12H14O5 | 238.24 |
—— | 3-(4-hydroxy-3-methoxybenzyl)-5,7-dimethoxychroman-4-one | —— | C19H20O6 | 344.364 |
—— | 5,7,3',4'-Tetramethoxyhomoisoflavanone | 105245-63-4 | C20H22O6 | 358.391 |
5,7-二甲氧基磺烷酮 | 5,7-dimethoxyflavone | 1036-72-2 | C17H16O4 | 284.312 |
5,7-二甲氧基-3-苯基-2,3-二氢色烯-4-酮 | 5,7-dimethoxyisoflavanone | 26200-06-6 | C17H16O4 | 284.312 |
—— | 5,7,4'-Trimethoxyisoflavanone | 21554-70-1 | C18H18O5 | 314.338 |
—— | 4',5,7-trimethoxyflavanone | 66074-95-1 | C18H18O5 | 314.338 |
—— | 3-allyloxycarbonyl-5,7-dimethoxychroman-4-one | 153488-88-1 | C15H16O6 | 292.288 |
—— | 3-(4-methoxybenzylidene)-5,7-dimethoxychroman-4-one | 27181-65-3 | C19H18O5 | 326.349 |
—— | 5,7-dimethoxy-3-(4'-methoxybenzylidene)chroman-4-one | 27181-65-3 | C19H18O5 | 326.349 |
—— | (±)-portulacanone D | —— | C17H14O5 | 298.295 |
—— | (E)-3-(3'-hydroxy-4'-methoxybenzylidene)-5,7-dimethoxychroman-4-one | —— | C19H18O6 | 342.348 |
—— | 3-(2,4-dimethoxy-phenyl)-5,7-dimethoxy-chroman-4-one | 1100-14-7 | C19H20O6 | 344.364 |
—— | hesperetin | 17060-20-7 | C19H20O6 | 344.364 |
—— | 5,7,2',5'-tetramethoxyflavanone | —— | C19H20O6 | 344.364 |
A variety of flavones were expediently synthesized from readily accessible chromanones
The enolates of various propiophenones, chromanones, and also analogues of naturally occurring flavanones were stereoselectively hydroxylated at the α-position, by employing commercially available enantiopure oxaziridines, to afford the desired α-hydroxylated target molecules in good to exceptional stereoselectivities and in moderate to good chemical yields. A mechanistic rationale is presented to account for the stereoselectivities achieved. These in vitro results were tentatively related to the stereoselective biosynthesis of enantio-enriched dihydroflavonols while questions were raised about the authenticity of certain natural compounds.