Lithium Hexamethyldisilazide → (S)-3-(2'-amino-3-(3,3-difluoropyrolidin-1-yl)-5'H-spiro[chromeno[2,3-c]pyridine-5,4'-oxazole]-7-yl)benzonitrile

Participants

Reaction Conditions

Reaction Steps

To a mixture of (S)-3-(2′-amino-3-chloro-5′H-spiro[chromeno[2,3-c]pyridine-5,4′-oxazole]-7-yl)benzonitrile (0.10 g, 0.257 mmol), 3,3-difluoropyrrolidine hydrochloride (0.111 g, 0.772 mmol), pd2(dba)3 (0.012 g, 0.013 mmol), and 2′-(dicyclohexylphosphino)-N,N-dimethylbiphenyl-2-amine (0.015 g, 0.039 mmol) in a resealed tube was added THF (1 mL) and 1.0 M lithium bis(trimethylsilyl)amide (1.543 mL, 1.543 mmol). The resulting mixture was heated at 90° C. for 17 h. The mixture was cooled, concentrated and purified by reverse phase HPLC to afford (S)-3-(2′-amino-3-(3,3-difluoropyrolidin-1-yl)-5′H-spiro[chromeno[2,3-c]pyridine-5,4′-oxazole]-7-yl)benzonitrile.

Provenance & Evidence