Purification of d,d'-2,2'(ethylenediimino) di-1-butanol...

Details Purification of d,d'-2,2'(ethylenediimino) di-1-butanol... Purification of d,d'-2,2'(ethylenediimino) di-1-butanol...

C - Chemistry, Metallurgy

07

C

260/607.5

C07C 215/14 (2006.01)

Patent

CA 1065344

TITLE: Purification of d,d'-2,2'(ethylenediimino)di- -1-Butanol Dihydrochloride INVENTOR: John Kazan ABSTRACT OF THE DISCLOSURE A superior grade of d,d'-2,2'-(ethylenediimino)di- -1-butanol dihydrochloride from the reaction of ethylene di- cloride and an excess of d-2-amino-1-butanol is obtained by mixing finely divided sodium hydroxide with the reaction mix- ture, vacuum distilling off d-2-amino-1-butanol, adding a 2-4 carbon alkanol, preferably isopropanol, separating sodium chloride, adding water or an aqueous 2-4 carbon alkanol there- to to a water content of about 7-10% by weight, and an es- sentially stoichiometric amount of hydrogen chloride, to precipitate d,d'-2,2'-(ethylenediimino)di-1-butanol dihydro- chloride, cooling the reaction mixture, and separating a pharmaceutical grade product.

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