中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5,6-diamino-2-ethylthiopyrimidin-4(3H)-one | 290370-88-6 | C6H10N4OS | 186.238 |
6-氨基-5-溴-2-(乙基硫代)嘧啶-4-醇 | 4-amino-5-bromo-2-ethylthio-6-hydroxypyrimidine | 77708-90-8 | C6H8BrN3OS | 250.119 |
—— | 4-amino-2-ethylthio-6-hydroxypyrimidine-5-thiol | 77708-94-2 | C6H9N3OS2 | 203.289 |
HAp(hydroxyapatite)-encapsulated-γ-Fe2O3 supported sulfonic acid nanoparticles were used for the preparation of two series of 2-thioxopyrido[2,3-d]pyrimidines. In the first series, 2-thioxopyrido[2,3-d]pyrimidines were synthesised from 3-(6-amino-1,2,3,4-tetrahydro-4-oxo-2-thioxopyrimidin-5-yl)-3-oxopropanenitrile and arylaldehydes in the presence of [γ-Fe2O3@HAp-SO3H] as a nanocatalyst, in high yields (84–96%). In the second series, [γ-Fe2O3@HAp-SO3H] was used to catalyse the reaction of 6-amino-2-(alkylthio)-pyrimidine-4,6(1H,5H)-dione, 1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione and various arylaldehydes to prepare 2-thioxo-2,3,7,10-tetrahydropyrido[2,3-d:5,6-d']dipyrimidine-4,6 (1H,5H)-diones in excellent yields (93–98%).