Morpholine → 4-(2,6-Difluoro-4-nitrophenyl)morpholine

Participants

Reaction Steps

To a solution of 1.468 g of morpholine and 3.0 mL of diisopropylethylarnine in 80 mL of acetenitrile was added a solution of 5.019 g of 2,6-difluoro-4-nitrobenzene (trifiuoromethane) sulfonate in 10 mL of acetonitrile. The mixture was heated to reflux for 5 hours, then cooled and concentrated in vacuo. The residue was purified on a silica gel column (3 cm tall, 10 cm diam), eluting with 25% ethyl acetate/hexanes (v/v) and then 2% acetic acid/25% ethyl acetate/hexanes to give 1.95 g of an orange oil. This was washed with 5% ethyl acetate/hexanes, and the bright yellow solids air dried, mp 91°-92° C.

Provenance & Evidence