(3R,3a'S,9a'S,10a'S)-7-((1-oxaspiro[2.3]hexan-2-yl)methoxy)-6-hydroxy-1',1',12'-trimethyl-6',7',8',9',10',10a'-hexahydro-1'H,3'H,4'H-spiro[indoline-3,2'-[3a,9a](epiminomethano)cyclopenta[b]quinolizine]-2,11'-dione 在
四氯化锡 作用下,
以
四氢呋喃 为溶剂,
反应 0.25h,
以50%的产率得到(3a''S,8'R,9a''S,10a''S)-3'-hydroxy-1'',1'',12''-trimethyl-2',3',6'',7'',8'',9'',10'',10a''-octahydro-1''H,3''H,4''H-dispiro[cyclobutane-1,4'-[1,4]dioxepino[2,3-g]indole-8',2''-[3a,9a](epiminomethano)cyclopenta[b]quinolizine]-9',11''(10'H)-dione