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.
中间体及合成6-单取代四氢叶酸C6-立体异构体的方法,包括(6S)-四氢叶酸的合成。中间体显示为其两个对映体形式,如下所示: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(取代羟基、乙酰氧基、苄氧基、烷氧基、烷基硫基、氨基、羧基、氧代基或磷酸酯)、受保护的醛基,或:其中n=1或2,R.sub.4为氢、甲酰基、甲基或丙炔基,ZZ代表氨基酸或氨基酸聚合物。此外,还提供了一种四氢叶酸N5-甲酰化的方法,用于制备N5-甲酰-(6S)-四氢叶酸。