中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-氨基-4-溴-2-(羟基甲基)-9,10-蒽醌 | 1-amino-4-bromo-2-(hydroxymethyl)anthraquinone | 24094-46-0 | C15H10BrNO3 | 332.153 |
1-氨基-9,10-二氧代-9,10-二氢蒽-2-甲醛 | 1-amino-9,10-dioxo-9,10-dihydro-anthracene-2-carbaldehyde | 6363-87-7 | C15H9NO3 | 251.241 |
1-氨基-2-(羟甲基)蒽-9,10-二酮 | 1-amino-2-hydroxymethyl-9,10-dioxo-9,10-dihydroanthracene | 24094-44-8 | C15H11NO3 | 253.257 |
氨基-9,10-蒽二酮 | 1-amino-9,10-anthracenedione | 82-45-1 | C14H9NO2 | 223.231 |
Anthraquinone (AQ) derivatives play a prominent role in medicine and also in textile industry. Bromaminic acid (1-amino-4-bromoanthraquinone-2-sulfonic acid) is an important precursor for obtaining dyes as well as biologically active compounds through the replacement of the C4-bromo substituent with different (ar)alkylamino residues. Here we report methods for the synthesis of bromaminic acid analogues bearing different substituents at the 2-position of the anthraquinone core. 1-Aminoanthraquinone was converted to its 2-hydroxymethyl-substituted derivative which, under different reaction conditions, yielded the corresponding carbaldehyde, carboxylic acid, and nitrile derivatives. The latter was further reacted to obtain 1-amino-2-tetrazolylanthraquinone. Subsequent bromination using bromine in DMF led to the corresponding bromaminic acid derivatives in excellent isolated yields (>90%) and high purities. Alternatively, 1-amino-4-bromo-2-hydroxymethylanthraquinone could be directly converted to the desired 2-substituted bromaminic acid analogues in high yields (85–100%). We additionally report the preparation of bromaminic acid sodium salt and 1-amino-2,4-dibromoanthraquinone directly from 1-aminoanthraquinone in excellent yields (94–100%) and high purities. The synthesized brominated AQs are valuable precursors for the preparation of AQ drugs and dyes.