Morpholine → HCID 19434058, compound

Participants

Reaction Steps

To a solution of the product from Step C (0.79 g, 3.42 mmol) and triethylamine (1.04 g, 10.3 mmol) in anhydrous THF (30 mL) at ambient temperature was added methanesulfonic anhydride (0.89 g, 5.13 mmol) with stirring. After 30 min morpholine (2 mL) was added and the mixture stirred for 1 h at ambient temperature and then heated at reflux temperature for 1 h. The volatiles were evaporated and a saturated aqueous solution of sodium bicarbonate (80 mL) was added. This mixture was extracted with ethyl acetate (2×100 mL) and the combined extracts were dried (MgSO4) and evaporated to give a viscous oil which was purified by column chromatography (silica, 30 to 50% ethyl acetate/hexane) to give a white solid (0.82 g, 84%): mp 104°-106° C.

Provenance & Evidence