8-tetrahydro-6-methylpterin, was shown to be of (S)-configuration at the C-6 chiral center by a synthesis, which was performed by condensation of 5-bromo-6-chloro-1,3-dimethyluracil and (2S)-1-amino-2-(methylamino) propane. The structure of the condensation product was determined unequivocally by an independent synthesis using a regioselective methylation of 5,6,7,8-tetrahydro-1,3,6-trimethyllumazine.
(+)-5,6,7,8-Tetrahydro-1,3,5,6-tetramethyllumazine,一种衍生自酶促还原 (-)-5,6,7,8-四氢-6-甲基蝶呤的化合物通过合成在 C-6 手性中心具有 (S)-构型,该合成通过 5-
溴-6-
氯-1,3-二甲基尿
嘧啶和 (2S)-1-
氨基-2-(甲
氨基)
丙烷。缩合产物的结构通过使用 5,6,7,8-四氢-1,3,6-trimethyllumazine 的区域选择性甲基化的独立合成明确确定。