Tert-butyl 4-cyanophenylcarbamate → HCID 178507458, compound

Participants

Reaction Steps

Compound 14 (3.25 g, 14.9 mmol) was converted into oxadiazolone 15 as described earlier for the preparation of compound 3. The resulting crude light orange solid was stirred for 5 h in a mixture of DCM (15 mL) and TFA (8 mL). Concentration under reduced pressure and evaporation with toluene (2×10 mL) gave a brown solid which was purified by silica gel (40 g) column chromatography (eluent: EtOAc) to yield compound 16 (1.81 g, 69% over the three steps). Rf 0.5 (EtOAc).

Provenance & Evidence