Preparation of 2-amino-4(3H)-oxopyrimido[5,4-b][1,4]thiazines (5-thiapterins) and their evaluation as cofactors for phenylalanine hydroxylase
作者:Robert N. Henrie、Robert A. Lazarus、Stephen J. Benkovic
DOI:10.1021/jm00358a019
日期:1983.4
Reaction of diethyl chloromalonate with beta-mercapto amines, 9, gave 1,4-thiazin-3-ones, 10, which were alkylated exclusively at the lactam oxygen with triethyloxonium tetrafluoroborate and subsequently condensed with guanidine to give the first reported 5-thiapterins, 8. Oxidation of 8 with m-chloroperoxybenzoic acid gave the S-oxides, 12. Both 8 and 12 were found to be good inhibitors of rat liver
氯丙二酸二乙酯与β-巯基胺9的反应生成1,4-硫嗪3酮10,仅在内酰胺氧上与四氟硼酸三乙基氧鎓烷基化,然后与胍缩合,得到第一个报道的5-硫代庚啶, 8.用间氯过氧苯甲酸氧化8生成S-氧化物12。发现8和12都是与6-甲基四氢蝶呤竞争的大鼠肝脏苯丙氨酸羟化酶的良好抑制剂,其中8的Ki值低于相应的12。 8-硫杂环丁烷4的抑制剂要差得多。