Ethyl isocyanate → Acetic Acid 7-allyl-1-ethylcarbamoyl-1H-indazol-6-yl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of the product from Step C (2.5 g, 11.6 mmol) in THF (10 mL) was added ethylisocyanate (1.01 ml, 13 mmol) and the mixture heated at 70° C. for 18 h. The reaction mixture was evaporated to a residue which was purified by chromatography (silica, 10% to 50% EtOAc/hexane) to give a colorless oil (2.70 g, 81%): LC/MS (+APCI) m/z 288 (M+H).

Provenance & Evidence