Piperazine → HCID 54041243, compound

HRID 362591Notes

Reaction equation

HRID 362591 reaction equation
[CH:1]1([N:4]2[C:13]3[C:8](=[CH:9][C:10]([F:17])=[C:11](F)[C:12]=3[O:14][CH3:15])[C:7](=[O:18])[C:6]([C:19]([OH:21])=[O:20])=[CH:5]2)[CH2:3][CH2:2]1.[NH:22]1[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]1.COB(OC)OC.C(#N)C>O>[CH:1]1([N:4]2[C:13]3[C:8](=[CH:9][C:10]([F:17])=[C:11]([N:25]4[CH:24]=[CH:23][N:22]=[CH:27][CH2:26]4)[C:12]=3[O:14][CH3:15])[C:7](=[O:18])[C:6]([C:19]([OH:21])=[O:20])=[CH:5]2)[CH2:3][CH2:2]1

Participants

6

Reactant 4

HCID 4837PiperazineHCID 6342AcetonitrileHCID 8470Trimethyl borateHCID 70194651-Cyclopropyl-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid

Product 1

HCID 54041243HCID 54041243, compoundYield 81.7%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 1.48 g of 1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid (5 mmol), 0.86 g of anhydrous piperazine (10 mmol), 1.04 g of trimethoxyborane (10 mmol) and 7.5 ml of acetonitrile was refluxed with heating for 4 hours. The reaction solution was cooled to room temperature, 20 ml of water was added therein, a pH was adjusted to 8 with 6N--HCl, and separated crystals were filtered and dried to obtain 1.46 g of the objective compound.

Workup

  1. temperaturewas refluxed
  2. temperaturewith heating for 4 hours
  3. customHCl, and separated crystals
  4. filtrationwere filtered
  5. customdried

Sources & evidence

ORD record
ord-b1e3955c359a48c7be3188a17c523ca8
Source dataset
uspto-grants-1999_02
Patent number
US05869661

Reaction notes

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