The title sulfone was cyclocondensed with cyclopentenones under palladium catalysis in a biphasic system (1N KOH-TEBA/CH2Cl2) to give methylene-bicyclo [3,3,0]octanones in 39-43% yield.
                                    在
钯催化下,在双相体系(1N KOH-
TEBA / CH 2 Cl 2)中,标题砜与
环戊烯酮进行环缩合,以39-43%的产率得到亚甲基-双环[3,3,0]辛酮。