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温度

0 °C

99 g (1.39 mole) of pyrrolidine dissolved in 460 ml of n-pentane were added clropwise to 40 g (0.464 mole) of 3-pentanone dissolved in 1600 ml of n-pentane, and the solution was cooled to 0° C. in an ice bath. 48.4 g (0.255 mole) of titanium tetrachloride dissolved in 480 ml of n-pentane were added dropwise at 0° C.-10° C. within one hour, the mixture was stirred for two further hours at RT, and the suspension was filtered. The filtrate was concentrated by evaporation on a rotary evaporator (500 to 10 mbar), and 44.3 g of 1-(1-ethylpropenyl)pyrrolidine (68.6% of theory) were obtained in this way.

1. additionwere added dropwise at 0° C.-10° C. within one hour
2. filtrationthe suspension was filtered
3. concentrationThe filtrate was concentrated by evaporation on a rotary evaporator (500 to 10 mbar)