2-Methyl-N-(oxetan-3-ylidene)propane-2-sulfinamide → HCID 69932998, compound

Participants

Reaction Conditions

Reaction Steps

A solution of n-butyllithium in hexanes (1.6 M, 0.35 mL, 0.56 mmol, 1.5 equiv) was added to a solution of 3-bromo-5-{1-ethyl-5-[4-(trifluoromethyl)phenoxy]-1H-pyrazol-3-yl}pyridine (152 mg, 0.37 mmol, 1.0 equiv) in tetrahydrofuran (1.5 mL) and hexanes (1.5 mL) at −78° C. The reaction mixture was stirred at −78° C. for 10 minutes, and then 2-methyl-N-oxetan-3-ylidenepropane-2-sulfinamide (Example 95, Step 4, 75 mg, 0.43 mmol, 1.15 equiv) was added neat via syringe. The reaction mixture was stirred at −78° C. for 5 minutes, then the cooling bath was removed. After 5 minutes, the mixture was quenched with water (2 mL) and extracted with EtOAc (3×5 mL). The combined organic layer was dried over MgSO4, filtered, and concentrated. The crude residue was purified by silica gel chromatography (50-100% EtOAc/hexane, then 0-5% MeOH/EtOAc) to give N-[3-(5-{1-ethyl-5-[4-(trifluoromethyl)phenoxy]-1H-pyrazol-3-yl}pyridine-3-yl)oxetan-3-yl]-2-methylpropane-2-sulfinamide (125 mg, 57%). Calc'd (M+1)+: 508.6. Found: 509.5.

Provenance & Evidence