1-(Piperidin-3-yl)methanamine → 7-[3-(Aminomethyl)-1-piperidinyl]-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid

HRID 980645Notes

Reaction equation

HRID 980645 reaction equation
Cl[C:2]1[N:11]=[C:10]2[C:5]([C:6](=[O:17])[C:7]([C:14]([OH:16])=[O:15])=[CH:8][N:9]2[CH2:12][CH3:13])=[CH:4][C:3]=1[F:18].[NH2:19][CH2:20][CH:21]1[CH2:26][CH2:25][CH2:24][NH:23][CH2:22]1>C(#N)C>[NH2:19][CH2:20][CH:21]1[CH2:26][CH2:25][CH2:24][N:23]([C:2]2[N:11]=[C:10]3[C:5]([C:6](=[O:17])[C:7]([C:14]([OH:16])=[O:15])=[CH:8][N:9]3[CH2:12][CH3:13])=[CH:4][C:3]=2[F:18])[CH2:22]1

Participants

4

Reactant 2

HCID 908801-(Piperidin-3-yl)methanamineHCID 127908597-Chloro-1-ethyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid

Product 1

HCID 137727397-[3-(Aminomethyl)-1-piperidinyl]-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acidYield 91.9%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 1.04 g (3.84 mmole) of 7-chloro-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, 100 ml of acetonitrile and 1.32 g (11.5 mmole) of 3-aminomethylpiperidine [J. Org. Chem., 44, 4536 (1979)] were stirred at room temperature for four days. The reaction was filtered and the precipitate dissolved in aqueous ammonia, pH 10.5. The solution was filtered and the solvent removed at reduced pressure. The product was washed with water, then ether until dry to give 1.23 g of 7-[3-(aminomethyl)-1-piperidinyl]-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, mp 120°-122° C.

Workup

  1. filtrationThe reaction was filtered
  2. dissolutionthe precipitate dissolved in aqueous ammonia
  3. filtrationThe solution was filtered
  4. customthe solvent removed at reduced pressure
  5. washThe product was washed with water
  6. dry with materialether until dry

Sources & evidence

ORD record
ord-88628facd93c42c193031d1d2967cf25
Source dataset
uspto-grants-1987_01
Patent number
US04638067

Reaction notes

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