Hydrochloric Acid → 917089-10-2

HRID 403457Notes

Reaction equation

HRID 403457 reaction equation
[Na+].[Cl:2][C:3]1[CH:4]=[C:5]([CH:21]=[CH:22][C:23]=1[Cl:24])[CH2:6][C:7]1[NH:8][C:9](=[O:20])[C:10]2[C:15]([CH3:16])=[C:14]([C:17]([O-:19])=[O:18])[S:13][C:11]=2[N:12]=1.[OH-].[Na+].Cl>O>[Cl:2][C:3]1[CH:4]=[C:5]([CH:21]=[CH:22][C:23]=1[Cl:24])[CH2:6][C:7]1[NH:8][C:9](=[O:20])[C:10]2[C:15]([CH3:16])=[C:14]([C:17]([OH:19])=[O:18])[S:13][C:11]=2[N:12]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 57821272917089-11-3

Product 1

HCID 54755916917089-10-2

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

A mixture of 2-(3,4-dichlorobenzyl)-5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid mono sodium salt (2.503 g), 1 mol/L aqueous sodium hydroxide solution (6.4 mL) and water (22.5 mL) was dissolved by stirring with heating. The reaction mixture was allowed to cool under room temperature, neutralized with 1 mol/L hydrochloric acid (12.8 mL), and water (8.3 mL) was added. The mixture was stirred with heating under reflux for 8 hr, and further at about 70° C. for 8 hr. Water (50 mL) was added (solvent amount was set to 100 ml), and the mixture was cooled to about 21° C. The suspension was poured into a G2 glass filter (diameter 3 cm), and the pressure reduction was started at 50 hpa. The time necessary to the increase of pressure by the completion of filtration was 4 minutes 5 seconds. The height of the solid at that time was 2.1 cm (bulk 14.8 cm3). Then, an operation of washing the obtained solid with water (25 mL), followed by reduced pressure filtration at 50 hpa was repeated 3 times to confirm that the filtrate had pH 7. At this point, the total filtration time necessary for increasing the pressure was 6 minutes 33 seconds and the height of the final solid was 1.6 cm (bulk 11.3 cm3).

Workup

  1. dissolutionwas dissolved
  2. temperaturewith heating
  3. additionwas added
  4. stirringThe mixture was stirred
  5. temperaturewith heating
  6. temperatureunder reflux for 8 hr
  7. temperaturethe mixture was cooled to about 21° C
  8. additionThe suspension was poured into a G2 glass
  9. filtrationfilter (diameter 3 cm)
  10. temperatureThe time necessary to the increase of pressure by the completion of filtration
  11. waitwas 4 minutes 5 seconds
  12. washThen, an operation of washing the obtained solid with water (25 mL)
  13. filtrationfollowed by reduced pressure filtration at 50 hpa
  14. temperatureAt this point, the total filtration time necessary for increasing the pressure
  15. waitwas 6 minutes 33 seconds

Sources & evidence

ORD record
ord-ce52191a03d8455b9b6edf901032dc43
Source dataset
uspto-grants-2014_06
Patent number
US08748437B2

Reaction notes

Loading…