17-(cyclopropylmethyl)-4,5α-epoxy-14-hydroxy-3-methoxy-6-(1,3-dioxolan-2-yl)morphinan 在
N-氯代丁二酰亚胺 作用下,
以
乙腈 为溶剂,
以60%的产率得到(4'R,4a'S,7a'R,12b'S)-11'-chloro-3'-(cyclopropylmethyl)-9'-methoxy-1',2',3',4',5',6'-hexahydro-4a'H,7a'H-spiro[[1,3]dioxolane-2,7'-[4,12]methanobenzofuro[3,2-e]isoquinolin]-4a'-ol