Toluene → (E)-3-[(2S,4R)-4-(tert-butyl(dimethyl)silyl)oxy-1-methyl-pyrrolidin-2-yl]-N-[4-[[3-chloro-4-(2-pyridylmethoxy)phenyl]amino]-3-cyano-7-ethoxy-6-quinolyl]prop-2-enamide

Participants

Reaction Steps

N-[4-[[3-Chloro-4-(2-pyridylmethoxy)phenyl]amino]-3-cyano-7-ethoxy-6-quinolyl]-2-diethoxyphosphoryl-acetamide 1d (418 mg, 0.67 mmol) was dissolved in 2.5 mL of tetrahydrofuran in a dry ice bath, followed by dropwise addition of a solution of lithium bis(trimethylsilyl)amide (1 M) in toluene (1 mL, 1 mmol). After the mixture was stirred for 45 minutes, a solution of (2S,4R)-4-(tert-butyl(dimethyl)silyl)oxy-1-methyl-pyrrolidine-2-carbaldehyde 3e (326 mg, 1.34 mmol) in 2.5 mL of tetrahydrofuran was added, and stirred for another 1 hour, then warmed up to room temperature and stirred for 12 hours. The reaction mixture was concentrated under reduced pressure and the resulting residue was purified by silica gel column chromatography with elution system A to obtain the title compound (E)-3-[(2S,4R)-4-(tert-butyl(dimethyl)silyl)oxy-1-methyl-pyrrolidin-2-yl]-N-[4-[[3-chloro-4-(2-pyridylmethoxy)phenyl]amino]-3-cyano-7-ethoxy-6-quinolyl]prop-2-enamide 3f (292 mg, yield 61.2%) as a yellow solid.

Provenance & Evidence