4 Beckmann Rearrangement R、R HOR R N° oH R R H Ph CH3 CH3 PClk ethyl ether oH Ph H The group opposite to hydroxy will shift4 Beckmann Rearrangement C R R' N OH H + C R R' N HO C R' R N H O C CH3 Ph N H O PCl C 5 Ph CH3 N OH ethyl ether The group opposite to hydroxy will shift