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 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4,9,11-Trihydroxy-3-methyl-1H-cyclopenta[b]anthracene-5,10-dione | 93463-71-9 | C18H12O5 | 308.29 |
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.