Sodium Carbonate → HCID 58641236, compound
Reaction equation
[C:1]1([C@@H:7]2[CH:11]=[C:10](OS(C(F)(F)F)(=O)=O)[CH2:9][N:8]2[C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[F:27][C:28]1[CH:33]=[CH:32][C:31]([F:34])=[CH:30][C:29]=1B(O)O.C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:27][C:28]1[CH:33]=[CH:32][C:31]([F:34])=[CH:30][C:29]=1[C:10]1[CH2:9][N:8]([C:20]([O:22][C:23]([CH3:24])([CH3:25])[CH3:26])=[O:21])[C@H:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[CH:11]=1Participants
Conditions
- Temperature
- 90 °C
Procedure
A deoxygenated mixture of crude tert-butyl (2S)-2-phenyl-4-{[(trifluoromethyl)sulfonyl]oxy}-2,5-dihydro-1H-pyrrole-1-carboxylate (2-4, 7.65 mmol), 2,5-difluorophenyl boronic acid (1.81 g, 11.5 mmol), aqueous Na2CO3 solution (2 M, 11.5 mL, 23.0 mmol), and Pd(PPh3)4 (0.442 g, 0.383 mmol) in dioxane (100 mL) was heated at 90° C. for 45 minutes. The reaction mixture was cooled, then partitioned between brine (200 mL) and a 1:1 mixture of ethyl acetate and hexane (200 mL). The organic layer was dried over sodium sulfate and concentrated. The residue was purified by flash column chromatography (SiO2, O-50% EtOAc/hexanes gradient) to provide tert-butyl (2S)-4-(2,5-difluorophenyl)-2-phenyl-2,5-dihydro-1H-pyrrole-1-carboxylate (2-5) as a white solid. LRMS nvz (M+H-CH3) 358.0 found, 358.2 required.
Workup
- temperatureThe reaction mixture was cooled
- custompartitioned between brine (200 mL)
- additiona 1:1 mixture of ethyl acetate and hexane (200 mL)
- dry with materialThe organic layer was dried over sodium sulfate
- concentrationconcentrated
- customThe residue was purified by flash column chromatography (SiO2
Sources & evidence
- ORD record
- ord-73c240a8196848df9f594a2b292a645b
- Source dataset
- uspto-grants-2007_11
- Patent number
- US07301028B2
Reaction notes
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