Acidity Constants of the Tetracycline Antibiotics
Acidity Constants of the Tetracycline Antibiotics
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DOI:
10.1021/ja01597a081
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发表时间:
1956-08
影响因子:
15
通讯作者:
C. R. Stephens;K. Murai;K. J. Brunings;R. Woodward
中科院分区:
文献类型:
--
作者:
C. R. Stephens;K. Murai;K. J. Brunings;R. Woodward
The three observed dissociation constants of the antibiotics oxytetracycline, chlorotetracycline and tetracycline have been assigned to specific acidic groupings. In each case, the first dissociation is due to the tricarbonyl system in ring A, the second to the dimethylammonium function1 and the third to the phenolic ß-diketone system (C. 10, C. ll, C. 12). The findings reveal that in neutral solution these antibiotics exist largely as zwitterions.