Novel compounds are provided having the formula
and salts thereof, where R
1
is hydrogen, an alkyl, aralkyl, hydroxymethyl, carboxymethyl, acyloxymethyl or trialkylsilyl group, or a group —CH
2
NR
3
R
4
where N is a linking nitrogen atom and where (a) R
3
and R
4
are independently selected from hydrogen and alkyl, alkenyl, hydroxyalkyl and alkoxyalkyl groups; (b) R
3
is hydrogen or an alkyl, alkenyl, hydroxyalkyl or alkoxyalkyl group, and R
4
is —COR
5
where R
5
is hydrogen or an alkyl, alkenyl, hydroxyalkyl or alkoxyalkyl group; or (c) R
3
and R
4
taken together with the linking nitrogen atom form a saturated 3- to 7-member heterocyclic group. These compounds are useful intermediates in a process to prepare camptothecin derivatives including the anti-cancer drug irinotecan.
提供具有以下公式及其盐的新化合物,其中R1为氢,烷基,芳基烷基,羟甲基,羧甲基,酰氧甲基或三烷基
硅基团,或者为-CH2NR3R4基团,其中N是连接氮原子,且(a)R3和R4独立选择自氢原子和烷基,烯基,羟基烷基和烷氧基烷基团;(b)R3为氢原子或烷基,烯基,羟基烷基或烷氧基烷基团,R4为-COR5,其中R5为氢原子或烷基,烯基,羟基烷基或烷氧基烷基团;或(c)R3和R4与连接氮原子一起形成饱和的3-至7-成员杂环基团。这些化合物在制备
喜树碱衍
生物,包括抗癌药物
伊立替康的过程中是有用的中间体。