反应详情

To a solution of 1-(trans-4-{[tert-butyl(dimethyl)silyl]oxy}cyclohexyl)-4-iodo-5-methyl-1H-pyrazole (1.15 g, 2.74 mmol) in THF (60 mL, 700 mmol) at rt was added 1.3 M of Isopropylmagnesium Chloride in THF (8.4 mL, 11 mmol), and the mixture was stirred for 1 h. The reaction was quenched with 2-methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (2.24 mL, 13.7 mmol), and allowed to stir at rt for 1 h. Sat. NH4Cl was added, and the organic solvent was removed in vacuo. The material was extracted with DCM and water. The organic layer was dry-loaded onto silica gel and purified via column chromatography, eluting with 2-7% EtOAc/heptane. The fractions containing the pure product were concentrated in vacuo to afford the title compound as a white solid. 1H NMR (400 MHz, methanol-d4): δ=0.12 (s, 6H), 0.93 (s, 9H), 1.32 (s, 12H), 1.47-1.60 (m, 2H), 1.84-2.06 (m, 6H), 2.46 (s, 3H), 3.72-3.82 (m, 1H), 4.10-4.22 (m, 1H), 7.59 (s, 1H).

1. stirringto stir at rt for 1 h
2. customthe organic solvent was removed in vacuo
3. extractionThe material was extracted with DCM and water
4. custompurified via column chromatography
5. washeluting with 2-7% EtOAc/heptane
6. additionThe fractions containing the pure product
7. concentrationwere concentrated in vacuo