Water → HCID 70817958, compound

HRID 1501338Notes

Reaction equation

[C:1]([O:5][C:6]([NH:8][C:9]1([C:13]2[CH:18]=[CH:17][C:16]([C:19]3[N:20]=[C:21]4[CH:26]=[CH:25][C:24]([C:27]([OH:29])=[O:28])=[N:23][N:22]4[C:30]=3[C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)=[CH:15][CH:14]=2)[CH2:12][CH2:11][CH2:10]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:37](=O)([O-])[O-].[Cs+].[Cs+].CI.O>CN(C=O)C>[C:1]([O:5][C:6]([NH:8][C:9]1([C:13]2[CH:14]=[CH:15][C:16]([C:19]3[N:20]=[C:21]4[CH:26]=[CH:25][C:24]([C:27]([O:29][CH3:37])=[O:28])=[N:23][N:22]4[C:30]=3[C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)=[CH:17][CH:18]=2)[CH2:10][CH2:11][CH2:12]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of 2-(4-{1-[(tert-butoxycarbonyl)amino]cyclobutyl}phenyl)-3-phenylimidazo[1,2-b]pyridazine-6-carboxylic acid that was prepared in a manner analgous to that described for Intermediate Example Int-27 (0.075 g, 0.16 mmol), cesium carbonate (0.15 g, 0.46 mmol, 3.0 equiv) and methyl iodide (0.020 mL, 0.31 mmol, 2.0 equiv) in DMF (2 mL) was stirred at room temperature for 2 days, after which additional methyl iodide (0.020 mL, 0.31 mmol, 2.0 equiv) was added and the mixture was heated at 50° C. for 3 h. The resulting mixture was treated with water (25 mL). The aqueous mixture was extracted with EtOAc (3×10 mL). The combined organics were dried (Na2SO4 anh) and concentrated under reduced pressure to give methyl 2-(4-{1-[(tert-butoxycarbonyl)amino]cyclobutyl}phenyl)-3-phenylimidazo[1,2-b]pyridazine-6-carboxylate (0.087 g, 113%) which was used without further purification:

Workup

customwas prepared in a manner analgous to
extractionThe aqueous mixture was extracted with EtOAc (3×10 mL)
dry with materialThe combined organics were dried (Na2SO4 anh)
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-3b3f0d396dd3414fa362a82c07d3d958
Source dataset: uspto-grants-2015_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09206185B2

Reaction notes

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