申请人:THE UNIVERSITY OF NOTRE DAME DU LAC
公开号:EP0123442A1
公开(公告)日:1984-10-31
There is described a process for preparing a compound of Formula (IV):
or an addition salt thereof, in which R is amino, a protected amino group, hydrogen, C1-C4 alkyl, C1-C4 alkoxycarbonyl, carboxy, protected carboxy, or C1-C4 alkyl substituted by hydroxy, halogen, methoxy, amino, protected amino, protected carboxy, or cyano; R' is hydrogen, C1-C4 alkyl, C1-C4 alkoxycarbonyl, protected carboxy, carboxy, phenyl, substituted phenyl substituted by C1-C4 alkyl, hydroxy, halogen, C1-C4 alkoxy, amino, protected amino, carboxy, protected carboxy, or cyano, or C1-C4 alkyl substituted by hydroxy, halogen, methoxy, amino, protected amino, carboxy, protected carboxy or cyano; and Z is hydrogen, an acyl group or sulfo group of the formula-SO-3 M+ in which M+ is an alkali metal cation or tri- or tetrasubstituted ammonium ion);
which comprises
a) ring closure of.a compound of Formula (III):
in which R, R1 are as defined above for Formula (IV), Z is acyl or SO3-M+, and Y is hydroxy, bromo or chloro, to provide a compound of Formula (IV) in which Z is acyl or SO3 M+; or,
b) acylating or treating with pyridine-SO3, a compound of Formula (IV) in which Z is hydrogen to produce a compound of Formula (IV) in which Z is other than hydrogen; or
c) exposing a compound of Formula (IV), in which Z is acyl other than pivaloyl to solvolytic conditions to produce a compound of Formula (IV) in which Z is hydrogen;
d) and, if desired, removing any protecting groups present and forming an addition salt thereof; and certain compounds per se resulting therefrom.
本发明描述了一种制备式(IV)化合物或其加成盐的工艺:
或其加成盐,其中 R 是氨基、受保护的氨基、氢、C1-C4 烷基、C1-C4 烷氧羰基、羧基、受保护的羧基或被羟基、卤素、甲氧基、氨基、受保护的氨基、受保护的羧基或氰基取代的 C1-C4 烷基;R' 是氢、C1-C4 烷基、C1-C4 烷氧羰基、受保护羧基、羧基、苯基、被 C1-C4 烷基、羟基、卤素、C1-C4 烷氧基、氨基、受保护氨基、羧基、受保护羧基或氰基取代的苯基,或被羟基、卤素、甲氧基、氨基、受保护氨基、羧基、受保护羧基或氰基取代的 C1-C4 烷基;和 Z 是氢、酰基或式-SO-3 M+ 的磺基,其中 M+ 是碱金属阳离子或三或四取代铵离子);
其中包括
a) 式(III)化合物的闭环:
其中 R、R1 如上式(IV)所定义,Z 是酰基或 SO3-M+,Y 是羟基、溴基或氯基,以提供式(IV)化合物,其中 Z 是酰基或 SO3 M+;或
b) 将 Z 为氢的式 (IV) 化合物酰化或用吡啶-SO3 处理,生成 Z 为氢以外的式 (IV) 化合物;或
c) 将式(IV)化合物(其中 Z 为除新戊酰基以外的酰基)置于溶解条件下,生成 Z 为氢的式 (IV)化合物;
d) 如果需要,除去任何存在的保护基团并形成其加成盐;以及由此产生的某些化合物本身。