(2S,2'R,4a'R,7'R,8a'R)-2-(4a',5',6',7',8',8a'-hexahydro-4',4',7'-trimethyl-4'H-1',3'-benzoxathiin-2'-yl)cyclobutanone 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以72%的产率得到(2R,2'R,4a'R,7'R,8a'R)-2-(4a',5',6',7',8',8a'-hexahydro-4',4',7'-trimethyl-4'H-1',3'-benzoxathiin-2'-yl)cyclobutanone