2-(1,3-二氧杂烷-2-基)吡啶 、
1-溴-三氟对二甲苯 在
乙醚 、
1-(p-trifluoromethylbenzyl)-2-(1,3-dioxolane-2-yl)pyridinium bromide 作用下,
以to afford 6 g (76.9%) of 1-(p-trifluoromethylbenzyl)-2-(1,3-dioxolane-2-yl)pyridinium bromide (Formula IX: R1 =R7 =H; R2 =4--CF3 ; Z- =Br-)的产率得到1-(p-trifluoromethylbenzyl)-2-(1,3-dioxolane-2-yl)pyridinium bromide