Pivaloyl chloride → HCID 178502457, compound

Participants

Reaction Steps

To a solution of ((S)-1-{(2S,4S)-2-[4-(5′-chloro-4′-{[6-((R)-2-methyl-piperazin-1-yl)-pyridine-3-carbonyl]-amino}-2′-trifluoromethoxy-biphenyl-4-yl)-1H-imidazol-2-yl]-4-methoxy-pyrrolidine-1-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester tri-HCl (10 mg, 0.01 mmol; Preparation 28) in DMA (1 mL) was added N,N-diisopropylethylamine (9.44 μL, 0.05 mmol) followed by 2,2-dimethylpropanoyl chloride (1.31 mg, 0.01 mmol). The reaction mixture was stirred at RT overnight, concentrated by rotary evaporation, dissolved in 1:1 acetic acid:water (1.5 mL) and purified by reverse phase HPLC to provide the di-TFA salt of the title compound (7 mg, 51% yield) (m/z): [M+H]+ calcd for C44H52ClF3N8O7 897.36. found 897.8.

Provenance & Evidence