反应详情

A mixture of trans-4-(4-iodo-1H-pyrazol-1-yl)cyclohexanol (1.00 g, 3.42 mmol), tert-butyldimethylsilyl chloride (1.03 g, 6.85 mmol), 4-dimethylaminopyridine (80 mg, 0.7 mmol), imidazole (699 mg, 10.3 mmol) and DCM (20 mL, 300 mmol) was stirred rt for 20 min. The material was transferred to a separatory funnel, extracting with DCM and sat. NaHCO3. The organic layer was dry-loaded onto silica gel for column chromatography, eluting with 3% EtOAc/hexanes. The fractions containing the pure product were concentrated in vacuo to afford the title compound as a clear oil. Typical yields are 95%. 1H NMR (400 MHz, DMSO-d6): δ=0.05 (s, 6H), 0.86 (s, 9H), 1.33-1.47 (m, 2H), 1.70-1.91 (m, 4H), 1.96 (d, J=11.9 Hz, 2H), 3.58-3.75 (m, 1H), 4.11-4.21 (m, 1H), 7.49 (s, 1H), 7.92 (s, 1H). MS (ES+): m/z=407.05 (100) [MH+]. HPLC: tR=3.22 min (v.v. non-polar—5 min, ZQ3).

1. customThe material was transferred to a separatory funnel
2. extractionextracting with DCM and sat. NaHCO3
3. washeluting with 3% EtOAc/hexanes
4. additionThe fractions containing the pure product
5. concentrationwere concentrated in vacuo