Tetrahydrofuran → HCID 178455358, compound
Reaction equation
[Si:1]([O:8][CH:9]1[CH2:14][CH2:13][CH:12]([N:15]2[CH:19]=[C:18]([I:20])[CH:17]=[N:16]2)[CH2:11][CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].C1COCC1.[Li+].CC([N-]C(C)C)C.C1CCCCC1.[F:40]N(S(C1C=CC=CC=1)(=O)=O)S(C1C=CC=CC=1)(=O)=O.[NH4+].[Cl-]>>[Si:1]([O:8][C@H:9]1[CH2:14][CH2:13][C@H:12]([N:15]2[C:19]([F:40])=[C:18]([I:20])[CH:17]=[N:16]2)[CH2:11][CH2:10]1)([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]Participants
Procedure
A solution of 1-[4-(tert-butyl-dimethylsilanyloxy)-cyclohexyl]-4-iodo-1H-pyrazole (200.0 mg, 0.4922 mmol) in THF (2 mL, 20 mmol) was cooled to −78° C., and 1.5 M of LDA in cyclohexane (0.98 mL, 1.5 mmol) was added. After stirring for 30 min, N-fluoro-N-(phenylsulfonyl)benzenesulfonamide (620.8 mg, 1.969 mmol) was added slowly, and the mixture was stirred at −78° C. for 30 min. Sat. NH4Cl was added to quench, and the organic solvent was removed in vacuo. The material was extracted with DCM and water, and the organic layer was dry-loaded onto silica gel for column chromatography, eluting with 1% EtOAc/heptane. The fractions containing the pure product were concentrated in vacuo to afford the title compound as a clear oil. MS (ES+): m/z=425.10 (100) [MH+]. HPLC: tR=2.22 min (polar—3 min, UPLC-ACQUITY).
Workup
- stirringthe mixture was stirred at −78° C. for 30 min
- customto quench
- customthe organic solvent was removed in vacuo
- extractionThe material was extracted with DCM and water
- washeluting with 1% EtOAc/heptane
- additionThe fractions containing the pure product
- concentrationwere concentrated in vacuo
Sources & evidence
- ORD record
- ord-9aa6ba1b61cf40e383a3f724bb4c48df
- Source dataset
- uspto-grants-2013_05
- Patent number
- US08445510B2
Reaction notes
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