Hydrochloric Acid → Dimethyl 2-methyl-4-(2-cyanophenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylate

HRID 894712Notes

Reaction equation

HRID 894712 reaction equation
[CH3:1][C:2]1[NH:3][C:4]([CH:24](OC)[O:25]C)=[C:5]([C:20]([O:22][CH3:23])=[O:21])[CH:6]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=2[C:18]#[N:19])[C:7]=1[C:8]([O:10][CH3:11])=[O:9].Cl.C(=O)(O)[O-].[Na+]>CC(C)=O.O>[CH3:1][C:2]1[NH:3][C:4]([CH:24]=[O:25])=[C:5]([C:20]([O:22][CH3:23])=[O:21])[CH:6]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=2[C:18]#[N:19])[C:7]=1[C:8]([O:10][CH3:11])=[O:9]

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 516892Sodium BicarbonateHCID 12896947HCID 12896947, compound

Product 1

HCID 15737326Dimethyl 2-methyl-4-(2-cyanophenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylateYield 98.2%

Reagents, catalysts & solvents 2

HCID 180AcetoneSolvent2×HCID 962WaterSolvent

Procedure

To a solution of dimethyl 2-methyl-4-(2-cyanophenyl)-6-dimethoxymethyl-1,4-dihydropyridine-3,5-dicarboxylate (6.0 g) in acetone (60 mg) was added 6 N hydrochloric acid (6 ml), and the resultant mixture was stirred for 3 hours at room temperature. The reaction mixture was diluted with water (30 ml), and adjusted to pH 7.5 with an aqueous sodium bicarbonate solution, and acetone was distilled off under reduced pressure. The resultant crystalline mass was crushed as finely as possible with a glass rod, washed with an additional water (100 ml), collected by filtration, further washed thoroughly with water, and air-dried to give crystalline powder of dimethyl 2-methyl-4-(2-cyanophenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylate (5.19 g).

Workup

  1. distillationwas distilled off under reduced pressure
  2. customThe resultant crystalline mass was crushed as finely as possible with a glass rod
  3. washwashed with an additional water (100 ml)
  4. filtrationcollected by filtration
  5. washfurther washed thoroughly with water
  6. customair-dried

Sources & evidence

ORD record
ord-428e5d366cf94b8393b6d62c120b98d0
Source dataset
uspto-grants-1981_08
Patent number
US04284634

Reaction notes

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