6-Thioxanthopterin (13) was synthesized in four steps starting from 2-amino-4-(penthyloxy)pteridine (3) via the 8-oxide 4, its subsequent interconversion to the 6-chloro (7) and 6-thio derivative (12) and final hydrolysis of the pentyloxy group. 7-Thioisoxanthopterin (15) was derived analogously from 2-amino-4-(pentyloxy)pteridine-7(8H)-thione (14) by alkaline hydrolysis. The various 6- and 7-thiopteridines
6- Thioxanthopterin(13)在从开始的四个步骤合成2-
氨基-4-(penthyloxy)蝶啶(3)通过8氧化物4,其随后互向6-
氯(7)和6-
硫代衍
生物(12)和戊氧基的最终
水解。通过碱性
水解类似地从2-
氨基-4-(戊氧基)蝶啶-7(8 H)-
硫酮(14)衍生出7-
硫代
异黄蝶呤(15)。将各种6-和7-
噻吩啶甲基化,得到相应的6-(10,11)和7-(甲
硫基)衍
生物(16,17)。新合成的化合物通过元素分析,紫外光谱以及酸性和碱性p K a值的测定来表征。详细讨论光谱关系。