Toluene → (E)-N-[4-[(3-Chloro-4-fluoro-phenyl)amino]-7-ethoxy-quinazolin-6-yl]-3-[(2R)-1-methylpyrrolidin-2-yl]prop-2-enamide

Participants

Reaction Conditions

Reaction Steps

N-[4-[(3-Chloro-4-fluoro-phenyl)amino]-7-ethoxy-quinazolin-6-yl]-2-diethoxyphosphoryl-acetamide 7b (300 mg, 0.59 mmol) was dissolved in 10 mL of tetrahydrofuran. The mixture was cooled to −78° C. in a dry ice bath. Under argon, a solution of lithium bis(trimethylsilyl)amide (1 M) in toluene (1.2 mL, 1.18 mmol) was added dropwise. After the mixture was stirred for 30 minutes, (2R)-1-methylpyrrolidine-2-carbaldehyde 5c (133 mg, 1.18 mmol) was added, and the mixture was stirred for another 1 hour, then warm up to room temperature and stirred for 12 hours. The reaction mixture was concentrated, added with 10 mL of water, extracted with dichloromethane (25 mL×3). The combined organic extracts were washed with saturated brine (30 mL×2), dried over anhydrous sodium sulfate, filtered and 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-fluoro-phenyl)amino]-7-ethoxy-quinazolin-6-yl]-3-[(2R)-1-methylpyrrolidin-2-yl]prop-2-enamide 9 (130 mg, yield 47.3%) as a yellow solid.

Provenance & Evidence