Hydrochloric Acid → HCID 15737328, compound

HRID 894713Notes

Reaction equation

HRID 894713 reaction equation
[CH3:1][C:2]1[NH:3][C:4]([CH:28](OCC)[O:29]CC)=[C:5]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:6]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[C:19]([O:21][CH3:22])=[O:20])[C:7]=1[C:8]([O:10][CH2:11][CH3:12])=[O:9].Cl.O.C(=O)(O)[O-].[Na+]>CC(C)=O>[CH3:1][C:2]1[NH:3][C:4]([CH:28]=[O:29])=[C:5]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:6]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[C:19]([O:21][CH3:22])=[O:20])[C:7]=1[C:8]([O:10][CH2:11][CH3:12])=[O:9]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 516892Sodium BicarbonateHCID 12896958HCID 12896958, compound

Product 1

HCID 15737328HCID 15737328, compoundYield 100.3%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent2×

Procedure

To a solution of diethyl 2-methyl-4-(2-methoxycarbonylphenyl)-6-diethoxymethyl-1,4-dihydropyridine-3,5-dicarboxylate (5.03 g) in acetone (50 ml) was added 6 N-hydrochloric acid (5 ml), and the mixture was stirred for 2 hours at room temperature. After adding water (30 ml), the reaction mixture was neutralized with an aqueous sodium bicarbonate solution and acetone was distilled off under reduced pressure. The resultant oily precipitates were extracted with ethyl acetate. The ethyl acetate extracts were washed with water, saturated aqueous sodium chloride solution, dried over magnesium sulfate and evaporated to dryness under reduced pressure to give reddish oil of crude diethyl 2-methyl-4-(2-methoxycarbonylphenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylate (4.26 g), which was used in a succeeding reaction without further purification.

Workup

  1. distillationwas distilled off under reduced pressure
  2. customThe resultant oily precipitates
  3. extractionwere extracted with ethyl acetate
  4. washThe ethyl acetate extracts were washed with water, saturated aqueous sodium chloride solution
  5. dry with materialdried over magnesium sulfate
  6. customevaporated to dryness under reduced pressure

Sources & evidence

ORD record
ord-dfbb5361f8d146808bedbfe232d100ba
Source dataset
uspto-grants-1981_08
Patent number
US04284634

Reaction notes

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