Hydrochloric Acid → HCID 68297209, compound

HRID 920096Notes

Reaction equation

[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:23])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][CH:16]([CH2:19][CH3:20])[CH2:17][CH3:18])[C:10](=[O:21])[C:9](Br)=[CH:8]2)=[O:4].[C:24]1([Sn](CCCC)(CCCC)CCCC)[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=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:23])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][CH:16]([CH2:19][CH3:20])[CH2:17][CH3:18])[C:10](=[O:21])[C:9]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[CH:8]2)=[O:4]

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 3-bromo-1-(2-ethyl-butyl)-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (500 mg, 1.3 mmol), PhSnBu3 (0.51 mL, 1.6 mmol), and PdCl2(PPh3)2 (183 mg, 0.26 mmol) in DMF (25 mL) was heated at 120° C. under nitrogen atmosphere for 3 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 brine, and dried over MgSO4. After evaporating the solvent in vacuo, the crude product was chromatographed (3-35% EtOAc/hexanes+1% AcOH) to give 280 mg of the title compound as a yellow solid. MS: (+) m/z 381.34 (M+1).

Workup

temperatureAfter the mixture was cooled to r.t.
extractionThe aqueous layer was extracted with additional EtOAc
washwashed with water and brine
dry with materialdried over MgSO4
customAfter evaporating the solvent in vacuo
customthe crude product was chromatographed (3-35% EtOAc/hexanes+1% AcOH)

Sources & evidence

ORD record: ord-6fd274fe45824c99a83359d87610626c
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09271970B2

Reaction notes

Loading…