乙酸酐 、
4,5α-epoxy-3-methoxy-17-methyl-morphinan-6-one semicarbazone 在
zinc(II) chloride 作用下,
反应 2.5h,
以63.5%的产率得到1-[(4R,4aR,7S,7aR,12bS)-9-methoxy-3,5'-dimethylspiro[1,2,4,4a,5,6,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinoline-7,2'-1,3,4-oxadiazole]-3'-yl]ethanone