| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| 1,4,8-三羟基蒽酮 | 1,4,5-trihydroxy-9,10-anthracenedione | 2961-04-8 | C14H8O5 | 256.215 |
| —— | 4-pyrrolidino-1,5-dihydroxy-9,10-anthraquinone | 106491-46-7 | C18H15NO4 | 309.321 |
Condensation of leuco-5-hydroxyquinizarin with aldehydes under Marschalk conditions (sodium hydroxide – water) gives 2-alkyl-5-hydroxyquinizarins with high regioselectivity, while the 3-alkyl compounds are obtained under Lewis conditions (piperidinium acetate – isopropanol). Reaction of the quinone with nitronate anions in methanol yields 2-alkyl derivatives exclusively.