Acetic Anhydride → HCID 22999720, compound

Participants

Reaction Steps

To a stirring solution of tert-butyl 5-amino-3-(2-hydroxyethoxy)-4-isoxazolecarboxylate (R. Neidlein, J.Heterocyclic Chem., 1989, 26,1335) (5.60 g) and triethylamine (3.36 ml) in tetrahydrofuran (50 ml) at room temperature was added dimethylaminopyridine (280 mg) followed by acetic anhydride (2.81 g). The reaction was stirred for 2 hours at room temperature. The solvent was removed in vacuo to yield the crude material (6.0 g). The crude material was purified using the Biotage™ Flash 40i System (silica, 90 g), eluting with ethyl acetate:hexane (1:1) to yield the product as an off white solid (5.0 g)

Provenance & Evidence