Demethylation reactions of 4-amino-<i>N</i>-(2,6-dimethoxy-4-pyrimidinyl)benzenesulfonamide (sulfadimethoxine) in strongly basic aqueous solution
作者:Tadayoshi Miura、Makoto Ono、Atomi Yoshida、Masahiro Kato、Toshiyuki Yoshioka、Hiroshi Tachi、Shoji Eguchi
DOI:10.1002/jhet.5570310618
日期:1994.11
Hydrolysis of 1 in strongly basic aqueous solution afforded mono- and didemethylated products 2,3 and 4, that are postulated as the metabolites of 1 in some animals. This hydrolytic demethylation was shown to proceed stepwise via mono-demethylation to give 2 and 3, followed by their further demethylation to 4. The hydrolytic reactivity of 1–3 was rationalized based on MO calculation results and 13C
在强碱性水溶液中1的水解产生单-和双二甲基化的产物2,3和4,假定它们在某些动物中为1的代谢产物。该水解脱甲基显示出通过单脱甲基逐步进行以得到2和3,随后将它们进一步脱甲基成4。根据MO计算结果和13 C nmr数据合理化了1-3的水解反应性。