反应详情

The hydroxide form of 1-[1-(4-chloro-phenyl)-cyclopropyhnethyl]-1-ethyl-pyrrolidinium cation is obtained by an ion exchange treatment of the iodide salt with Ion-Exchange Resin-OH (BIO RAD® AH1-X8). In a 1-liter volume plastic bottle, 100 gm (255 mmol) of 1-[1-(4-chloro-phenyl)-cyclopropylmethyl]-1-ethyl-pyrrolidinium iodide is dissolved in 300 ml de-ionized water. Then, 320 gm of the ion exchange resin is added and the solution is allowed to gently stir overnight. The mixture is then filtered, and the resin cake is rinsed with minimal amount of de-ionized water. The filtrate is analyzed for hydroxide concentration by titration analysis on a small sample of the solution with 0.1N HCl. The reaction yields 96% of (245 mmol) of the desired 1-[1-(4-chloro-phenyl)-cyclopropylmethyl]-1-ethyl-pyrrolidinium hydroxide (hydroxide concentration of 0.6 M).

1. filtrationThe mixture is then filtered
2. washthe resin cake is rinsed with minimal amount of de-ionized water
3. concentrationThe filtrate is analyzed for hydroxide concentration by titration analysis on a small sample of the solution with 0.1N HCl