Hydrochloric Acid → HCID 54725927, compound

HRID 224722Notes

Reaction equation

HRID 224722 reaction equation
[O-]CC.[Na+].[C:5]([O:13]CC)(=O)[CH2:6][C:7]([O:9][CH2:10][CH3:11])=[O:8].[CH3:16][S:17][C:18]1[N:19]=[CH:20][C:21]2[C:26](=O)[O:25]C(=O)[N:23]([CH2:29][C:30]3[CH:38]=[CH:37][C:36]4[O:35][CH2:34][O:33][C:32]=4[CH:31]=3)[C:22]=2[N:39]=1.Cl>O>[CH2:10]([O:9][C:7]([C:6]1[C:5](=[O:13])[N:23]([CH2:29][C:30]2[CH:38]=[CH:37][C:36]3[O:35][CH2:34][O:33][C:32]=3[CH:31]=2)[C:22]2[N:39]=[C:18]([S:17][CH3:16])[N:19]=[CH:20][C:21]=2[C:26]=1[OH:25])=[O:8])[CH3:11]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 7761Diethyl MalonateHCID 2723922Sodium ethoxideHCID 20562028HCID 20562028, compound

Product 1

HCID 54725927HCID 54725927, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a solution of sodium ethoxide (1.6 g., 0.03 g. atom of sodium in 50 ml. of absolute ethanol) was added 4.8 g. (0.03 mole) of diethyl malonate. The ethanol was removed under suction in a rotary evaporator. To the residue was added 50 ml. of dry dimethyl formamide followed by 3.5 g. (0.01 mole) of 7-methylthio-1-piperonyl-2H-pyrimido[4,5-d][1,3]oxazine-2,4(1H)-dione. The reaction mixture was heated under reflux for 2 hours, cooled in ice and poured into 400 ml. of water. The reaction mixture was acidified with conc. hydrochloric acid. The resulting precipitateable amounted to 5.0 g.--m.p. 173°-178° C. Recrystallization from dimethyl formamide gave 3.4 g. of pure product--m.p. 187°-188° C.

Workup

  1. customThe ethanol was removed under suction in a rotary evaporator
  2. additionTo the residue was added 50 ml
  3. temperatureThe reaction mixture was heated
  4. temperatureunder reflux for 2 hours
  5. temperaturecooled in ice
  6. additionpoured into 400 ml
  7. customRecrystallization from dimethyl formamide
  8. customgave 3.4 g

Sources & evidence

ORD record
ord-9960a0739551410b918094b1fa3329da
Source dataset
uspto-grants-1980_11
Patent number
US04233446

Reaction notes

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