Toluene → Pyrotinib

Participants

Reaction Steps

N-[4-[[3-Chloro-4-(2-pyridylmethoxy)phenyl]amino]-3-cyano-7-ethoxy-6-quinolyl]-2-diethoxyphosphoryl-acetamide 1d (250 mg, 0.40 mmol) was dissolved in 10 mL of dry tetrahydrofuran in a dry ice bath, followed by dropwise addition of a solution of lithium bis(trimethylsilyl)amide (1 M) in toluene (440 μL, 0.44 mmol). The reaction mixture was stirred for 30 minutes, added dropwise with a solution of (2R)-1-methylpyrrolidine-2-carbaldehyde 5c (90 mg, 0.80 mmol) in 5 mL of tetrahydrofuran, and stirred for 30 minutes, 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)-N-[4-[[3-chloro-4-(2-pyridylmethoxy)phenyl]amino]-3-cyano-7-ethoxy-6-quinolyl]-3-[(2R)-1-methylpyrrolidin-2-yl]prop-2-enamide 5 (46 mg, yield 19.7%) as a yellow solid.

Provenance & Evidence