1-tert-Butyl 4-ethyl 5-oxoazepane-1,4-dicarboxylate → HCID 67979385, compound

Participants

Reaction Steps

To 4.64 g (16.26 mmol) 5-oxo-azepane-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester (route 1 step a) in 200 mL benzene at room temperature was added 1.47 g (8.13 mmol) copper (II) acetate and the resulting reaction mixture was stirred at room temperature for 30 minutes. 7.21 g (16.26 mmol) lead (IV) tetraacetate was added and the reaction was stirred at room temperature for 3 hours. After evaporation of the solvent, the material was partitioned between 250 mL EtOAc and 150 mL H2O, the organic layer was separated and washed with H2O (150 mL) and saturated brine (150 mL) and dried over MgSO4. After filtration and evaporation of the solvent the resulting solid was used for the next step without further purification.

Provenance & Evidence