Nitric Acid → HCID 13958503, compound

HRID 255572Notes

Reaction equation

HRID 255572 reaction equation
[CH3:1][C:2]1[CH:7]=[C:6]([C:8]2[CH:17]=[C:16]3[C:11]([C:12](=[O:23])[C:13]([C:20]([OH:22])=[O:21])=[CH:14][N:15]3[CH2:18][CH3:19])=[CH:10][CH:9]=2)[CH:5]=[C:4]([CH3:24])[N:3]=1.[N+:25]([O-])([OH:27])=[O:26].[NH4+].[OH-]>OS(O)(=O)=O>[CH2:18]([N:15]1[C:16]2[C:11](=[CH:10][C:9]([N+:25]([O-:27])=[O:26])=[C:8]([C:6]3[CH:5]=[C:4]([CH3:24])[N:3]=[C:2]([CH3:1])[CH:7]=3)[CH:17]=2)[C:12](=[O:23])[C:13]([C:20]([OH:22])=[O:21])=[CH:14]1)[CH3:19]

Participants

5

Reactant 3

HCID 944Nitric AcidHCID 14923Ammonium HydroxideHCID 30161497-(2,6-Dimethyl-4-pyridyl)-1-ethyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

Product 1

HCID 13958503HCID 13958503, compound

Reagents, catalysts & solvents 1

HCID 1118Sulfuric AcidSolvent2×

Procedure

To a stirred solution containing 200 g. of 7-(2,6-dimethyl-4-pyridinyl)-1-ethyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid in 440 ml of 95-98% H2SO4 was added a solution of 80 ml of 90% HNO3 in 80 ml of 95-98% H2SO4 over a period of one hour. The resulting solution was stirred at room temperature for an additional 20 minutes, then heated on a steam bath for 8 hours. The reaction mixture was allowed to stand at room temperature overnight and then poured into 6000 ml of ice water. The precipitate was collected and slurried in approximately 2000 ml water. Concentrated NH4OH was added to reach a pH of 5.5-6.0. The solid was collected and washed with a small amount of ethanol and ether. Additional material was obtained by treating the original filtrate with NH4OH as described above. Recrystallization from dimethylformamide gave several crops totalling 135 g (59%) and melting from 274° C. to 298° C. A 2.8 g sample was recrystallized from 20 ml of dimethylformamide, washed with ether and dried at 120° C. for 16 hours at 0.02 mm to produce 1.54 g of 1-ethyl-1,4-dihydro-7-(2,6-dimethyl-4-pyridinyl)-6-nitro-4-oxo-3-quinolinecarboxylic acid, m.p. 289°-291° C.

Workup

  1. additionTo a stirred solution containing 200 g
  2. temperatureheated on a steam bath for 8 hours
  3. waitto stand at room temperature overnight
  4. customThe precipitate was collected
  5. additionConcentrated NH4OH was added
  6. customThe solid was collected
  7. washwashed with a small amount of ethanol and ether
  8. customAdditional material was obtained
  9. customRecrystallization from dimethylformamide
  10. customgave several crops totalling 135 g (59%)
  11. custommelting from 274° C. to 298° C
  12. customA 2.8 g sample was recrystallized from 20 ml of dimethylformamide
  13. washwashed with ether
  14. customdried at 120° C. for 16 hours at 0.02 mm

Sources & evidence

ORD record
ord-cd2d49ca4b144ab983fc9226b96dc715
Source dataset
uspto-grants-1987_10
Patent number
US04698350

Reaction notes

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