A difluoroprostacyclin of the following formula (IV):
 wherein A is an ethylene group, a vinylene group or an ethynylene group, R is a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C2-10 alkenyl group, or a substituted or unsubstituted aralkyl group, Q is a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C3-8 cycloalkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group and each of R1 and R3, which are independent of each other, is a hydrogen atom or as a protecting group for a hydroxyl group, a triorganosilyl group, an acyl group, an alkyl group, an aralkyl group or a cyclic ether group.
                            下式(IV)的二
氟前列环素:
 其中 A 是
乙烯基、
乙烯基或
乙炔基;R 是取代或未取代的 C1-10 烷基、取代或未取代的 C2-10 烯基或取代或未取代的芳烷基;Q 是取代或未取代的 C1-10 烷基、取代或未取代的 C2-10 烯基、取代或未取代的 C2-10 烷炔基、取代或未取代的 C3-8 环烷基、取代或未取代的芳烷基或取代或未取代的芳烷基、取代或未取代的 C3-8 环烷基、取代或未取代的芳烷基或取代或未取代的芳基,且相互独立的 R1 和 R3 均为氢原子或作为羟基、三有机
硅基、酰基、烷基、芳烷基或
环醚基的保护基团。