Diiodomethane → HCID 178469927, compound

Participants

Reaction Steps

To a solution of ethyl 3-amino-1H-pyrazole-4-carboxylate (10.0 g, 64.5 mmol) in diiodomethane (130 mL, 1.61 mol) at −10° C. was added isoamyl nitrite (156.0 mL, 1.16 mol). The mixture was allowed to warm to ambient temperature then heated to 100° C. After 2 h, ethyl acetate was added. The mixture was washed with saturated aqueous Na2SO3, HCl (1N in water) then water. The organic layer was dried over MgSO4, filtered and concentrated. Purification by silica gel chromatography (100% hexanes→50% hexanes/ethyl acetate) gave the title compound (9.63 g). MS 267.1 (M+1).

Provenance & Evidence