Acetic Acid → HCID 13469488, compound

HRID 614612Notes

Reaction equation

HRID 614612 reaction equation
[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:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[N+:20]([O-:22])=[O:21])[C:7]=1[C:8]([O:10][CH2:11][CH2:12][OH:13])=[O:9].[BH4-].[Na+].C(O)(=O)C>C(O)C>[CH3:1][C:2]1[NH:3][C:4]([CH2:28][OH:29])=[C:5]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:6]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[N+:20]([O-:22])=[O:21])[C:7]=1[C:8]([O:10][CH2:11][CH2:12][OH:13])=[O:9]

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 4311764Sodium borohydrideHCID 20574379HCID 20574379, compound

Product 1

HCID 13469488HCID 13469488, compoundYield 49.3%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a solution of 2-hydroxyethyl 2-methyl-4-(2-nitrophenyl)-5-ethoxycarbonyl-6-formyl-1,4-dihydropyridine-3-carboxylate (2.0 g) in ethanol (40 ml) was added bit-by-bit sodium borohydride (113.5 mg) at 5° C. under stirring. The mixture was further stirred at 5° C. for 30 minutes and acidified weakly with 50% acetic acid. After removal of the ethanol, to the residue was added water, and the mixture was made slightly alkaline with an aqueous solution of sodium bicarbonate, allowed to stand and then filtered, when it became clear. The precipitate (1.58 g) was collected by filtration and recrystallized from a mixture of ethanol and diisopropyl ether to give yellowish-orange granules (0.99 g) of 2-hydroxyethyl 2-methyl-4-(2-nitrophenyl)-5-ethoxycarbonyl-6-hydroxymethyl-1,4-dihydropyridine-3-carboxylate, m.p. 167° to 169° C.

Workup

  1. stirringThe mixture was further stirred at 5° C. for 30 minutes
  2. customAfter removal of the ethanol
  3. additionto the residue was added water
  4. filtrationfiltered
  5. filtrationThe precipitate (1.58 g) was collected by filtration
  6. customrecrystallized from a mixture of ethanol and diisopropyl ether

Sources & evidence

ORD record
ord-320539d64b28429885feae1e61424ce0
Source dataset
uspto-grants-1979_03
Patent number
US04145432

Reaction notes

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