130049-82-0, Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 130049-82-0, name is 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidine-4-one. A new synthetic method of this compound is introduced below.
Example-4 Preparation of Paliperidone (0098) 3-(2-chloroethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (formula-7) (5.2 grams) and diisopropyl ethyl amine (12.56 grams) was added to 6-fluoro-3-(piperidin-4-yl)benzo[d]isoxazole (formula-8) (5.0 grams) in methanol (75 ml) taken in autoclave and then heated to 60-65 C., 0.8 Kg pressure was applied and stirred for 16 hours. The reaction mixture cooled and then distilled under reduced pressure. Isopropyl alcohol was added to the obtained residue and stirred for 15 minutes and then distilled off under reduced pressure to get the title compound. Added methanol and heated the reaction mixture to reflux temperature and stirred for 2.0 hrs at same temperature. Cooled the reaction mixture to 20 C. and stirred for 90 minutes at the same temperature. Filtered the solid precipitated. Washed the solid with chilled methanol and dried the compound. (0099) Yield: 3.0 grams.
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 130049-82-0, 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidine-4-one, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; MSN Laboratories Limited; Reddy, Manne Satyanarayana; Eswaraiah, Sajja; Satyanarayana, Revu; US8481729; (2013); B2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia