Cesium carbonate → HCID 67606621, compound

HRID 1529330Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6](I)[CH:7]=1.[CH3:9][C:10]([O:13][C:14]([NH:16][CH:17]1[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]1)=[O:15])([CH3:12])[CH3:11].C(=O)([O-])[O-].[Cs+].[Cs+].C(C1CCCCC1=O)(=O)C(C)C>CCOC(C)=O.O1CCOCC1>[Br:1][C:2]1[CH:7]=[C:6]([N:20]2[CH2:19][CH2:18][CH:17]([NH:16][C:14](=[O:15])[O:13][C:10]([CH3:11])([CH3:9])[CH3:12])[CH2:22][CH2:21]2)[CH:5]=[N:4][CH:3]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 3-bromo-5-iodopyridine (600 mg, 2.113 mmol, Aldrich), 4-(n-boc-amino)-piperidine (466 mg, 2.325 mmol, Aldrich), Cut (40.3 mg, 0.211 mmol, Aldrich) and cesium carbonate (1377 mg, 4.23 mmol, Strem) was capped, degassed and backfilled with argon (3×). Dioxane (2 mL) and 2-isobutyrylcyclohexanone (0.141 mL, 0.845 mmol, Aldrich) were added, and the reaction was stirred at 70° C. After 43 h, the reaction mixture was cooled to 23° C., diluted with EtOAc (50 mL) and washed with brine (50 mL), dried over MgSO4, concentrated in vacuo and purified by silica gel chromatography (eluent: 15-40% EtOAc/hexane), affording tert-butyl 1-(5-bromopyridin-3-yl)piperidin-4-ylcarbamate (198 mg, 26%). MS (ESI, pos. ion) m/z: 356.0 (M+1), 358.0 (M+3).

Workup

customwas capped
customdegassed
temperaturethe reaction mixture was cooled to 23° C.
washwashed with brine (50 mL)
dry with materialdried over MgSO4
concentrationconcentrated in vacuo
custompurified by silica gel chromatography (eluent: 15-40% EtOAc/hexane)

Sources & evidence

ORD record: ord-8d3a84186d9e4c0b94ab5fe527291767
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09090593B2

Reaction notes

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