中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-氨基-6-甲基-5,6,7,8-四氢蝶啶-4(1H)-酮 | 6-methyl-5,6,7,8-tetrahydrobopterin | 942-41-6 | C7H11N5O | 181.197 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-甲基-6-(4-甲亚基环己-2-烯-1-基)庚-2-烯-4-酮 | (-)-6-methyl-5,6,7,8-tetrahydropterin | 73573-51-0 | C7H11N5O | 181.197 |
—— | 6-cyano-6-methyl-5,6,7,8-tetrahydropterin | 32263-06-2 | C8H10N6O | 206.207 |
The preparation of 6,6-dimethyl-5,6,7,8-tetrahydropterin (5) hydrochloride, a possible substrate for the phenylalanine hydroxylating system, has been achieved by trimethylsilylating 6-methyl-7,8- dihydropterin, reacting with methyllithium and removing the trimethylsilyl groups. Attempts to prepare this pterin by intramolecular cyclization of 2,5-diamino-6-(2'-hydroxy-2'-methylpropyl)-aminopyrimidin-4(3H)-one (17) gave the isomeric 5,8-diamino-3,3-dimethyl-2,3-dihydroimidazo- [1,2-clpyrimidin-7(1H)-one (20).
6-Aminomethyl-5,6,7,8-tetrahydropterin has been prepared by reduction of 2-acetamido-6-cyanopteridin-4(3H)-one* to 2-acetamido-6-aminomethyl- 5,6,7,8-tetrahydropteridin-4(3H)-one followed by acid hydrolysis. The hitherto undescribed 6-cyanopterin was prepared by careful hydrolysis of the 2-acetamido compound prepared by dehydration of the oxime derived from 2-acetamido-6-formylpteridin-4(3H)-one. The latter was prepared by selenium dioxide oxidation of the methyl compound. Oxidation of 6-aminomethyl-5,6,7,8-tetrahydropterin at neutral pH appears to proceed with significant side-chain loss in Tris buffer but not in phosphate buffer.