Hydrochloric Acid → (1S,2S,3S) 2-hydroxymethyl-3-(4-methoxy-benzyloxymethyl)-cyclopropanecarboxylic acid [2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenyl]-amide

Participants

Reaction Conditions

Reaction Steps

A solution of 850 mg (3.4 mmol) of 1-(4-amino-3-fluoro-phenyl)-1H-pyridin-2-one (prepared according to C. F. Bigge et al., patent application WO 2003045912) in 80 ml of THF was cooled to −78° C., treated dropwise with 4.8 ml of a 1M lithium bis(trimethylsilyl)amide-solution in THF and stirred for 30 min at 78° C. To this solution were added 839 mg (4.8 mmol) of (1R,5S,6S) 6-(4-methoxy-benzyloxymethyl)-3-oxa-bicyclo[3.1.0]hexan-2-one dissolved in 5 ml of THF. Stirring was continued at −78° C. for 1 hr and then for 3 hrs at RT. Pouring of the mixture into a 2M aqueous solution of HCl, extraction with AcOEt, drying of the combined organic phases over Na2SO4, filtration and evaporation of the solvent gave 1.2 g (77%) of (1S,2S,3S) 2-hydroxymethyl-3-(4-methoxy-benzyloxymethyl)-cyclopropanecarboxylic acid [2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenyl]-amide. Yellow semisolid. 453 (M+H)+.

Provenance & Evidence