A process for the preparation of compounds of formula (XI)
starting from compounds of formula (VII)
or (VIII),
in which
R is a hydrogen atom, a straight or branched or cyclic C1-C6 alkyl group, unsubstituted or substituted by 1 to 10 oxygen atoms, or a C1-C20 alkyl group, optionally interrupted by a phenylene, in its turn substituted by a straight or branched C1-C6 alkyl group, unsubstituted or substituted by 1 to 3 C1-C7 groups; the aromatic group being unsubstituted or substituted by, carboxy, sulfamoyl, hydroxyalkyl, amino groups by hydrolysis in basic conditions at high temperature and under pressure.
一种从式(VII)化合物开始制备式(XI)化合物的工艺
以式(VII)或(VIII)化合物为起点
或 (VIII)
其中
R 是氢原子、直链或支链或环状 C1-C6 烷基(未被取代或被 1 至 10 个氧原子取代)或 C1-C20 烷基(可选择被亚苯基打断),依次被直链或支链 C1-C6 烷基(未被取代或被 1 至 3 个 C1-C7 基团取代)取代;芳香基团未被取代或被羧基、
氨基磺酰基、羟烷基、
氨基取代,在碱性条件下于高温高压下
水解。