Water → 1-Cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-5-vinyl-3-quinolinecarboxylic acid

HRID 2258119Notes

Reaction equation

HRID 2258119 reaction equation
[CH:1]1([N:4]2[C:13]3[C:8](=[C:9]([CH:17]=[CH2:18])[C:10]([F:16])=[C:11]([F:15])[C:12]=3[F:14])[C:7](=[O:19])[C:6]([C:20]([O:22]CC)=[O:21])=[CH:5]2)[CH2:3][CH2:2]1.O.S(=O)(=O)(O)O>C(O)(=O)C>[CH:1]1([N:4]2[C:13]3[C:8](=[C:9]([CH:17]=[CH2:18])[C:10]([F:16])=[C:11]([F:15])[C:12]=3[F:14])[C:7](=[O:19])[C:6]([C:20]([OH:22])=[O:21])=[CH:5]2)[CH2:3][CH2:2]1

Participants

5

Reactant 3

HCID 962Water2×HCID 1118Sulfuric AcidHCID 22924366Ethyl 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-5-vinyl-3-quinolinecarboxylate

Product 1

HCID 152976601-Cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-5-vinyl-3-quinolinecarboxylic acidYield 75.6%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

3 g of the product of Example A are refluxed for 1.5 hours in a mixture of 40 ml of glacial acetic acid, 2 ml of water and 0.6 ml of concentrated sulphuric acid. The reaction mixture is then treated with 40 ml of water and cooled to room temperature. The product is filtered off with suction, washed with water and dried. 2.08 g of the title compound are obtained (75% of theory).

Workup

  1. filtrationThe product is filtered off with suction
  2. washwashed with water
  3. customdried

Sources & evidence

ORD record
ord-b9539c7f4c024e409b89ce678a1f921e
Source dataset
uspto-grants-1997_08
Patent number
US05659038

Reaction notes

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