4-Methylmorpholine → ((5-Isoxazolyl)methyl)-(4-nitrophenyl)carbonate

Participants

Reaction Steps

A 631 mg (2.65 mmol) sample of p-nitrophenoxycarbonylchloride in 2 mL of methylene chloride was added to a solution of 310 mg (3.13 mmol) of 5-hydroxymethyisoxazole and 0.344 mL of 4-methylmorpholine in 2 mL of methylene chloride cooled in an ice bath. The solution was stirred for 4 hours. The mixture was diluted with methylene chloride, which was washed with water, dried and concentrated. The crude product was chromatographed on silica gel, eluting with 2% ethyl acetate in methylene chloride. The solvent was removed and the product dried to afford 0.473 g of the title compound, which was taken directly to the next step.

Provenance & Evidence