Hydrochloric Acid → HCID 68297361, compound

HRID 1410974Notes

Reaction equation

[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:25])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([C@@H:15]([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH3:16])[C:10](=[O:23])[C:9](Br)=[CH:8]2)=[O:4].[C:26]1([Sn](CCCC)(CCCC)CCCC)[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1.CCOC(C)=O.Cl>CN(C=O)C.[Cl-].[Na+].O.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>[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:25])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([C@@H:15]([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH3:16])[C:10](=[O:23])[C:9]([C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1)=[CH:8]2)=[O:4]

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of (R)-3-bromo-5-hydroxy-2-oxo-1-(1-phenyl-ethyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (500 mg, 1.24 mmol), PhSnBu3 (0.49 mL, 1.49 mmol), and PdCl2(PPh3)2 (174 mg, 0.25 mmol) in DMF (10 mL) was heated at 120° C. under nitrogen atmosphere for 2 h. After the mixture was cooled to r.t., brine and EtOAc were added. 1 M HCl was added until pH was about 3. 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 (5-35% EtOAc/hexanes+1% AcOH) to give 313 mg of the title compound as a yellow solid. MS: (+) m/z 401.36 (M+1).

Workup

temperatureAfter the mixture was cooled to r.t.
extractionThe aqueous layer was extracted with additional EtOAc
washwashed with water
dry with materialdried over MgSO4
customAfter evaporating the solvent in vacuo
customthe crude product was chromatographed (5-35% EtOAc/hexanes+1% AcOH)

Sources & evidence

ORD record: ord-797d9a92a9cf463cb6ba5e1bf21cb99b
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08921389B2

Reaction notes

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