反应详情

A solution of (3R,4R)-benzyl 3-(tert-butoxycarbonylamino)-4-(methylsulfonyloxy)piperidine-1-carboxylate in pyridine (0.16 M) was heated to 120° C. in the microwave for 10 minutes. The solution was then concentrated to almost dryness and the forming solid was filtered to give the desired product. The filtrate was further purified via silica gel column chromatography eluting with ethyl acetate (100%) to yield (3aR,7aS)-benzyl 2-oxohexahydrooxazolo[4,5-c]pyridine-5(6H)-carboxylate in 75% combined yield. LCMS (m/z): 277.1 (MH+), Rt=2.327 min.

1. concentrationThe solution was then concentrated to almost dryness
2. filtrationthe forming solid was filtered