3-Amino-5-methylisoxazole → HCID 67235997, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4,4-dimethyl-1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxylic acid (100 mg, 0.37 mmol) in THF (2 mL) is added 1,1′-carbonyldiimidazole (149 mg, 0.92 mmol). The reaction mixture is heated at 55° C. for 1 h. The mixture is cooled to room temperature and 5-methyl-3-aminoisoxazole (144 mg, 1.47 mmol) is added. After stifling 10 min, 1,8-diazabicycloundec-7-ene (0.14 mL, 0.92 mmol) is added and the reaction is heated at 60° C. for 16 h. After cooling to room temperature, the solvent is evaporated and the residue is purified by preparative HPLC using 10-85% acetonitrile/water with 0.1% TFA to afford the title compound (79 mg, 61%). LCMS (ESMS): m/z 353.45 (M+H+).

Provenance & Evidence