Cesium carbonate → 1-(4-methoxybenzyl)-7-(3-hydroxyazetidin-1-yl)-1,5-naphthyridin-2(1H)-one

HRID 509632Notes

Reaction equation

HRID 509632 reaction equation
[CH3:1][O:2][C:3]1[CH:21]=[CH:20][C:6]([CH2:7][N:8]2[C:17]3[C:12](=[N:13][CH:14]=[C:15](Br)[CH:16]=3)[CH:11]=[CH:10][C:9]2=[O:19])=[CH:5][CH:4]=1.Cl.[NH:23]1[CH2:26][CH:25]([OH:27])[CH2:24]1.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>[CH3:1][O:2][C:3]1[CH:21]=[CH:20][C:6]([CH2:7][N:8]2[C:17]3[C:12](=[N:13][CH:14]=[C:15]([N:23]4[CH2:26][CH:25]([OH:27])[CH2:24]4)[CH:16]=3)[CH:11]=[CH:10][C:9]2=[O:19])=[CH:5][CH:4]=1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 27592903-Hydroxyazetidine hydrochlorideHCID 679930111-(4-methoxybenzyl)-7-bromo-1,5-naphthyridin-2(1H)-one

Product 1

HCID 679929881-(4-methoxybenzyl)-7-(3-hydroxyazetidin-1-yl)-1,5-naphthyridin-2(1H)-oneYield 91%

Reagents, catalysts & solvents 3

HCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 312751,4-DioxaneSolvent

Procedure

A mixture of 1-(4-methoxybenzyl)-7-bromo-1,5-naphthyridin-2(1H)-one (C-5) (8.1 g, 23.46 mmol, 1.0 eq), azetidin-3-ol hydrochloride (3.08 g, 28.15 mmol, 1.2 eq), Pd2(dba)3 (429 mg, 0.47 mmol, 0.02 eq), Xantphos (407 mg, 0.7 mmol, 0.03 eq) and Cs2CO3 (19.87 g, 61 mmol, 2.6 eq) in 1,4-dioxane (100 mL) was heated at reflux temperature under argon atmosphere overnight then cooled and filtered, the filter cake was washed with ethyl acetate and the combined filtrate was concentrated in vacuo and the residue was purified by column chromatography on silica gel (1-5% MeOH-DCM) to afford 1-(4-methoxybenzyl)-7-(3-hydroxyazetidin-1-yl)-1,5-naphthyridin-2(1H)-one (C-6) (7.2 g, 91% yield). 1H NMR (300 MHz, DMSO-d6) δ: 7.76 (m, 2H), 7.17 (d, J=8.7 Hz, 2H), 6.84 (d, J=8.7 Hz, 2H), 8.53 (m, 2H), 5.68 (d, J=6.3 Hz, 1H), 5.34 (s, 2H), 4.56 (m, 1H), 4.13 (m, 2H), 3.66 (s, 3H), 3.59 (m, 2H); ESI-MS m/z: 338.1 [M+H]+.

Workup

  1. temperaturewas heated
  2. temperatureat reflux temperature under argon atmosphere overnight
  3. temperaturethen cooled
  4. filtrationfiltered
  5. washthe filter cake was washed with ethyl acetate
  6. concentrationthe combined filtrate was concentrated in vacuo
  7. customthe residue was purified by column chromatography on silica gel (1-5% MeOH-DCM)

Sources & evidence

ORD record
ord-bd8a83e5b4814095a8b0c8bec2020bfe
Source dataset
uspto-grants-2015_08
Patent number
US09096590B2

Reaction notes

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