Acetic Acid → 3-(1-((1-cyclopropylpiperidin-4-yl)methyl)-1H-pyrazol-4-yl)-6-fluoro-1-(phenylsulfonyl)-1H-indole

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-fluoro-1-(phenylsulfonyl)-3-(1-(piperidin-4-ylmethyl)-1H-pyrazol-4-yl)-1H-indole (Intermediate 21; 277 mg; 0.63 mmol), HOAc (121 mg; 2.01 mmol), (1-ethoxycyclopropoxy)trimethylsilane (220 mg; 1.26 mmol) and NaBH3CN (60 mg; 0.95 mmol) in DCM/MeOH/THF (10 ml/1 ml/15 ml) was stirred at 70° C. overnight. The reaction mixture was added saturated aqueous NH4Cl (20 mL), extracted with EtOAc (50 mL×2). The combined organic layers were dried over anhydrous Na2SO4, filtered, concentrated, and purified by reverse phase flash chromatography to afford 137 mg (45%) of the title compound as a yellow oil.

Provenance & Evidence