The solvolysis rates for the substituted C(7)-cyclohexylamino- or C(8)-cyclohexyliminomitomycins 8-19 were determined in buffered methanolic solutions (0.06 M bis-Tris·HCl, pH: 5.5) at 25 °C and then compared with mitomycin C (1) and porfiromycin. Kinetic studies showed that C(8)-cyclohexyliminomitomycins 8-13 underwent solvolysis 150-230 times faster than mitomycin C (1) to give C(1)-methoxymitosene products. The solvolysis rates were slightly faster than that reported for 6. The C(7)-(2′-hydroxy)cyclohexylaminomitomycins 16-19 exhibited comparable solvolysis rates with 1 and porfiromycin.
取代的 C(7)-环己基
氨基-或 C(8)-环己基亚
氨基丝
裂霉素 8-19 的溶剂分解率在缓冲
甲醇溶液(0.06
M bis-
Tris·HCl,pH:5.5)中测定。 25 °C,然后与
丝裂霉素 C (1) 和
卟啉霉素进行比较。动力学研究表明,C(8)-环己基亚
氨基丝
裂霉素8-13的溶剂分解速度比丝
裂霉素C(1)快150-230倍,产生C(1)-甲氧基丝
裂霉素产物。溶剂分解速率比报道的 6 稍快。C(7)-(2'-羟基)环己基
氨基丝
裂霉素 16-19 表现出与 1 和
卟啉霉素相当的溶剂分解速率。