10-Bromo-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine-2-carboxamide → 3-(2-Carbamoyl-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-9-ylethynyl)-3-hydroxy-8-aza-bicyclo[3.2.1]octane-8-carboxylic acid tert-butyl ester

Participants

Reaction Steps

This compound was prepared according to a procedure similar to that described in Procedure E. In a solution of 9-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid amide (300 mg, 1.0 mmol) in acetonitrile (6 mL) and triethylamine (3 mL) were added Pd(PPh3)2Cl2 (70 mg, 0.1 mmol), 3-Ethynyl-3-hydroxy-8-aza-bicyclo[3.2.1]octane-8-carboxylic acid tert-butyl ester (0.5 g, 2 mmol) and CuI (19 mg, 0.1 mmol). Then the solution was bubbled N2 for 5 min and microwaved for 2 h at 120° C. under nitrogen. The reaction mixture was filtered and the filtrate was purified by column (EtOAc/hexanes 2:1) to afford crude product (0.5 g, 99%). LCMS=479.2 [M+H]+.

Provenance & Evidence