1,1'-Carbonyldiimidazole → HCID 71288110, compound

Participants

Reaction Steps

CDI (1.2 g, 7.34 mmol) was added portion-wise to a stirred solution 3,3-difluorocyclobutanecarboxylic acid (1 g, 7.34 mmol) in NMP (10 mL). After 30 minutes, (Z)-tert-butyl 5-(N′-hydroxycarbamimidoyl)-2-methylphenylcarbamate (35) (1.8 g, 7.34 mmol) was added in one portion and stirred for another hour at room temperature. The solution was then heated via microwave at 120° C. for 20 minutes. The solution was partitioned with EtOAc and water. The organic phase was separated, dried over MgSO4 and purified over silica gel to afford tert-butyl (5-(5-(3,3-difluorocyclobutyl)-1,2,4-oxadiazol-3-yl)-2-methylphenyl)carbamate (36) (1.2 g, 45% yield). MS m/z 366.1 (M+1)+.

Provenance & Evidence