Pyridine → HCID 86697414, compound

Participants

Reaction Steps

To a solution of tert-butyl 1-(3,4-dichlorophenyl)-6-formyl-3-azabicyclo[3.1.0]hexane-3-carboxylate (2.50 g, 7.02 mmol, prepared from maleimide and 3,4-dichloroaniline according to the methods described in WO 2009141412 and WO 2008074716), in ethanol (40 mL) under nitrogen atmosphere, were added pyridine (2.82 mL, 35.04 mmol) and O-methylhydroxylamine hydrochloride (1.17 g, 14.01 mmol). The reaction mixture was refluxed for 5 h. After completion of the reaction as confirmed by TLC, the solvent was evaporated. The crude compound was extracted with ethyl acetate (20 mL). The organic layer was separated, washed with 5% HCl (5 mL), water (10 mL), dried over Na2SO4 and concentrated in vacuo to afford crude product which was purified by column chromatography (silica gel, 1:9 EtOAc:Pet Ether) to afford pure tert-butyl 1-(3,4-dichlorophenyl)-6-((methoxyimino)methyl)-3-azabicyclo[3.1.0]hexane-3-carboxylate (2.45 g, 90%) as a viscous oil as a mixture of isomers.

Provenance & Evidence