lithium diisopropylamide, took place smoothly to give the corresponding 1,3-dipolar cycloadducts, fluorine-containing pyrrolidines, in good yields and with high diastereoselectivities (>95:<5). When the fluorinated acrylate bore a chiral auxiliary as a substituent, for instance (l)-(–)-menthyl ester, the 1,3-dipolarcycloaddition reaction was found to give the corresponding fluorinated pyrrolidine derivatives