Hydrochloric Acid → 1-Cyclohexylmethyl-5-hydroxy-2-oxo-3-phenyl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

HRID 1410933Notes

Reaction equation

HRID 1410933 reaction equation
[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:24])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:10](=[O:22])[C:9](Br)=[CH:8]2)=[O:4].[C:25]1([Sn](CCCC)(CCCC)CCCC)[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1.O.Cl>CN(C=O)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.CCOC(C)=O>[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:24])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:10](=[O:22])[C:9]([C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)=[CH:8]2)=[O:4]

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 607632TributylphenyltinHCID 682976893-Bromo-1-cyclohexylmethyl-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 682976181-Cyclohexylmethyl-5-hydroxy-2-oxo-3-phenyl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl esterYield 72.4%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of 3-bromo-1-cyclohexylmethyl-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (100 mg, 0.25 mmol), PhSnBu3 (0.1 mL, 0.30 mmol), and PdCl2(PPh3)2 (36 mg, 0.051 mmol) in DMF (5 mL) was heated at 120° C. under nitrogen atmosphere for 2 h. After the mixture was cooled to r.t., water and EtOAc were added. 1 M HCl was added until pH was about 3-4. The aqueous layer was extracted with additional EtOAc and the organic layers were combined, washed with water, and dried over MgSO4. After evaporating the solvent in vacuo, the crude product was chromatographed (5% EtOAc/CH2Cl2) to give 71 mg of the title compound. MS: (+) m/z 393.37 (M+1).

Workup

  1. temperatureAfter the mixture was cooled to r.t.
  2. extractionThe aqueous layer was extracted with additional EtOAc
  3. washwashed with water
  4. dry with materialdried over MgSO4
  5. customAfter evaporating the solvent in vacuo
  6. customthe crude product was chromatographed (5% EtOAc/CH2Cl2)

Sources & evidence

ORD record
ord-d956f23d261a423083e3dd683aaa2b54
Source dataset
uspto-grants-2014_12
Patent number
US08921389B2

Reaction notes

Loading…