Ammonium Chloride → (4S,5S)-tert-butyl 5-((2,2-dimethylhexanamido)methyl)-4-((S)-2-(hydroxy(1-(3-methoxypropyl)-1H-indazol-6-yl)methyl)-3-methylbutyl)-2,2-dimethyloxazolidine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-iodo-1-(3-methoxypropyl)-1H-indazole (1.1 g, 3.48 mmol) in anhydrous THF (15 mL) at −78° C. under N2 was added dropwise n-BuLi (2.5 M in hexanes, 1.4 mL, 3.5 mmol). After stirring at −78° C. for 2 h, the reaction mixture was added through a cannula to a solution of (4S,5S)-tert-butyl 5-((2,2-dimethylhexanamido)methyl)-4-((S)-2-formyl-3-methylbutyl)-2,2-dimethyloxazolidine-3-carboxylate (160 mg, 0.35 mmol) in anhydrous THF (10 mL) at −78° C. The mixture was stirred at this temperature for 2 h, allowed to warm to rt and stirred overnight. Satd aq NH4Cl (25 mL) was added and the mixture was extracted with EtOAc (3×15 mL). The combined organic extracts were washed with brine, dried over Na2SO4 and evaporated. The residue was purified by column chromatography on silica gel to give (4S,5S)-tert-butyl 5-((2,2-dimethylhexanamido)methyl)-4-((S)-2-(hydroxy(1-(3-methoxypropyl)-1H-indazol-6-yl)methyl)-3-methylbutyl)-2,2-dimethyloxazolidine-3-carboxylate (45 mg, 20% yield). MS: 645 (M++1)

Provenance & Evidence