Cesium carbonate → 4-[4-(2-Pyridin-2-yl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)-quinolin-7-yloxy]-piperidine-1-carboxylic Acid Tert-Butyl Ester

HRID 8238Notes

Reaction equation

[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[C:7]1[C:8]([C:15]2[C:24]3[C:19](=[CH:20][C:21]([OH:25])=[CH:22][CH:23]=3)[N:18]=[CH:17][CH:16]=2)=[C:9]2[CH2:14][CH2:13][CH2:12][N:10]2[N:11]=1.[C:26]([O:30][C:31]([N:33]1[CH2:38][CH2:37][CH:36](Br)[CH2:35][CH2:34]1)=[O:32])([CH3:29])([CH3:28])[CH3:27].C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C)C=O>[C:26]([O:30][C:31]([N:33]1[CH2:38][CH2:37][CH:36]([O:25][C:21]2[CH:20]=[C:19]3[C:24]([C:15]([C:8]4[C:7]([C:2]5[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=5)=[N:11][N:10]5[CH2:12][CH2:13][CH2:14][C:9]=45)=[CH:16][CH:17]=[N:18]3)=[CH:23][CH:22]=2)[CH2:35][CH2:34]1)=[O:32])([CH3:29])([CH3:27])[CH3:28]

Participants

Conditions

Temperature: 80 °C

Procedure

To a suspension of 4-(2-pyridin-2-yl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)-quinolin-7-ol (0.27 g, 0.84 mmol) in N,N-dimethylformamide (15 mL) is added 4-bromo-piperidine-1-carboxylic acid tert-butyl ester (0.29 mL, 2.28 mmol) and cesium carbonate (1.5 g, 4.57 mmol. The mixture is heated at 80° C. for 48 h and concentrated in vacuo. The residue is taken up in dichloromethane, washed with water and brine, dried over sodium sulfate, and concentrated in vacuo. Purification by flash chromatography (SiO2, 7% methanol in dichloromethane) yields the title compound, 262 mg (61%,) as a yellow oil.

Workup

concentrationconcentrated in vacuo
washwashed with water and brine
dry with materialdried over sodium sulfate
concentrationconcentrated in vacuo
customPurification by flash chromatography (SiO2, 7% methanol in dichloromethane)

Sources & evidence

ORD record: ord-fd12723f3bbf4a11a7f816b10ab4001b
Source dataset: uspto-grants-2006_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07087626B2

Reaction notes

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