申请人:South Alabama Medical Science Foundation, USA
公开号:US05198547A1
公开(公告)日:1993-03-30
Intermediates and a process for the synthesis of 6-monosubstituted tetrahydropteridine C6-stereoisomers, including (6S)-tetrahydrofolic acid. The intermediates are shown in their two enantiomeric forms as follows: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and represent hydrogen, methyl, hydroxy, amino, alkyl or dialkylamino, alkoxy, benzyloxy, or benzylthio; R.sub.3 represents an alkene, alkyne, cycloalkyl, benzyl, alkyl (substituted with hydroxy, acetoxy, benzyloxy, alkoxy, alkylthio, amino, carboxy, oxo, or phosphate), a protected aldehyde, or ##STR2## wherein n=1 or 2, R.sub.4 is hydrogen, formyl, methyl, or propargyl, and ZZ represents an amino acid or amino acid polymer. Also, a process for tetrahydropteridine N5-formylation for the preparation of, for example, N5-formyl-(6S)-tetrahydrofolic acid.
一种合成6-单取代四氢
喜树碱C6-立体异构体(包括(6S)-四氢叶酸)的中间体和方法。其中中间体以它们的两个对映异构体形式显示如下: ##STR1## 其中R.sub.1和R.sub.2相同或不同,代表氢、甲基、羟基、
氨基、烷基或二烷基
氨基、烷氧基、苄氧基或苄
硫基;R.sub.3代表烯烃、
炔烃、环烷基、苄基、烷基(用羟基、乙酰氧基、苄氧基、烷氧基、烷基
硫基、
氨基、羧基、氧代或
磷酸酯取代)、受保护的醛基,或##STR2## 其中n = 1或2,R.sub.4是氢、甲酰基、甲基或
丙炔基,ZZ代表
氨基酸或
氨基酸聚合物。此外,还提供一种四氢
喜树碱N5-甲酰化的方法,用于制备例如N5-甲酰-
(6S)-四氢叶酸。