Isopropanol → 1-(1-(3-((1-(Quinolin-2-YL)azetidin-3-YL)oxy)pyrazin-2-YL)piperidin-4-YL)ethanone

HRID 2207817Notes

Reaction equation

Cl[C:2]1[C:3]([O:8][CH:9]2[CH2:12][N:11]([C:13]3[CH:22]=[CH:21][C:20]4[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=4)[N:14]=3)[CH2:10]2)=[N:4][CH:5]=[CH:6][N:7]=1.[NH:23]1[CH2:28][CH2:27][CH:26]([C:29](=[O:31])[CH3:30])[CH2:25][CH2:24]1.C([O-])([O-])=O.[K+].[K+].CC(O)C>O>[N:14]1[C:15]2[C:20](=[CH:19][CH:18]=[CH:17][CH:16]=2)[CH:21]=[CH:22][C:13]=1[N:11]1[CH2:12][CH:9]([O:8][C:3]2[C:2]([N:23]3[CH2:28][CH2:27][CH:26]([C:29](=[O:31])[CH3:30])[CH2:25][CH2:24]3)=[N:7][CH:6]=[CH:5][N:4]=2)[CH2:10]1

Participants

Conditions

Temperature: 160 °C

Procedure

To a mixture of 2-(3-((3-chloropyrazin-2-yl)oxy)azetidin-1-yl)quinoline (see PREPARATION P2.6; 312 mg, 1.0 mmol) and 1-(piperidin-4-yl)ethanone (127 mg, 1.0 mmol) and K2CO3 (276 mg, 2.0 mmol) was added i-PrOH (3 mL) and water (1.0 ml). The solution was heated to 160° C. under microwave for 5 hours. Then the mixture was concentrated and extracted with EtOAc (2×30 mL). The combined organic extracts were washed with water (10 mL) and brine (10 mL), dried over Na2SO4, and filtered. The filtrate was evaporated in vacuo and the residue was purified by flash column chromatography on silica gel (20% to 60% EtOAc in petroleum ether) to give the title product (72 mg, 0.18 mmol, 18% yield) as white solid. ESI-MS (M+1): 404 calc. for C23H25N5O2 403.

Workup

concentrationThen the mixture was concentrated
extractionextracted with EtOAc (2×30 mL)
washThe combined organic extracts were washed with water (10 mL) and brine (10 mL)
dry with materialdried over Na2SO4
filtrationfiltered
customThe filtrate was evaporated in vacuo
customthe residue was purified by flash column chromatography on silica gel (20% to 60% EtOAc in petroleum ether)

Sources & evidence

ORD record: ord-492756d62c394f469b10028520e11b91
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09376450B2

Reaction notes

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