A new synthetic route of 7-Bromopyrido[3,2-d]pyrimidin-4(3H)-one

At the same time, in my other blogs, there are other synthetic methods of this type of compound,573675-29-3, 7-Bromopyrido[3,2-d]pyrimidin-4(3H)-one, and friends who are interested can also refer to it.

With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.573675-29-3, name is 7-Bromopyrido[3,2-d]pyrimidin-4(3H)-one, molecular formula is C7H4BrN3O, molecular weight is 226.0302, as common compound, the synthetic route is as follows.COA of Formula: C7H4BrN3O

7-Bromopyrido[3,2-d]pyrimidin-4-ol (1.02 g, 4.51 mmol) was suspended in dry toluene (80 mL) under nitrogen. Phosphorus oxychloride (5.0 mL, 54.6 mmol) was added and the mixture heated to reflux under nitrogen. After 5 hours the reaction was cooled to RT. The solution was placed in a water bath and saturated sodium bicarbonate (50 mL) was added slowly with strong stirring. After 45 minutes the phases were separated and the organic evaporated to dryness under reduced pressure. The crude 7-bromo-4-chloropyrido[3,2-d]pyrimidine (0.46 g, 1.89 mmol, 42% yield) was used without further purification. 1H NMR (400 MHz, CHLOROFORM-d) delta ppm 8.59 (d, J=1.96 Hz, 1H) 9.11-9.15 (m, 2H). LC/MS (ESI+) m/z=243.8 (M+H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,573675-29-3, 7-Bromopyrido[3,2-d]pyrimidin-4(3H)-one, and friends who are interested can also refer to it.

Reference:
Patent; LEWIS, Richard T.; ALLEN, Jennifer R.; BROWN, James; GUZMAN-PEREZ, Angel; HUA, Zihao; JUDD, Ted; LIU, Qingyian; OLIVIERI, Philip R.; ROMERO, Karina; SCHENKEL, Laurie; STELLWAGEN, John; WHITE, Ryan; US2015/38497; (2015); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia