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Quantitative determination of amine mixtures by multiplicative distribution. IX. Separation of organic bases by Craig distribution

Schönenberger, Helmut ; Thies, Heinrich ; Borah, Kripanath


The sepn. of (+-)-BuNHCHPhCHPhNHBu, its meso isomer (I), iso-PrCHPhNHBu (II), PhCH2NHBu, and BuNH2, formed by reaction of benzylidenebutylamine with isopropylmagnesium halide in presence of MnCl2, by Craig after-fractionation processes in the solvent system CHCl3-MeOH-2% HCl (40:12:28) was complete after 95 steps in a distribution machine with 35 elements (E. Hecker, 1955). The over-all recovery ...


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