Schönenberger, Helmut (1958) The separation of N,N'-dibutyl-alpha ,alpha '-diphenylethylenediamine dihydrochloride into its meso and racemic forms by Craig's partition method. Chemische Berichte 91, pp. 862-864.
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The title compd. (285 mg., m. 185-220 Deg) was put through a 24-tube Craig app. using the solvent system 28:12:40 2% sq. HClMeOH-CHCl3, which gave a vol. ratio of the phases of 1.6. Most of component A (106 mg., m. 174-6 Deg) remained in the first 2 tubes; most of component B (168 mg., m. 214-16 Deg) was found in tubes 5 to 17 with a max. concn. in tube 11. By analogy with other stereoisomeric alpha ,alpha '-diphenylethylenediamines, it is concluded that A is racemic and B is meso.
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|Additional Information (public):||CAN 52:103991 10E Organic Chemistry: Benzene Derivatives 4169-62-4P Role: SPN (Synthetic preparation), PRP (Properties), PREP (Preparation) (The separation of N,N'-dibutyl-alpha ,alpha '-diphenylethylenediamine dihydrochloride into its meso and racemic forms by Craig's partition method); 96504-88-0P (Ethylenediamine, N,N'-dibutyl-1,2-diphenyl-, dihydrochloride) Role: PREP (Preparation) (sepn. of optical isomers by countercurrent distribution)|
|Institutions:||Chemistry and Pharmacy > Institute of Pharmacy > Alumni or Retired Professors > Prof. Schönenberger|
|Keywords:||Resolution (by countercurrent extn.) Extraction (countercurrent, resolution of optical isomers by) Isomerism (diastereo-, sepn. by countercurrent extn.)|
|Dewey Decimal Classification:||500 Science > 540 Chemistry & allied sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||No|
|Deposited on:||19 Nov 2010 09:58|
|Last modified:||19 Nov 2010 09:58|