53338-46-8Relevant academic research and scientific papers
Separation of 2,3-diamino-dihalopyrazines from mixtures as novel association products with certain ketones
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, (2008/06/13)
Insoluble association products are formed when solid 2,3-diamino-5,6-dihalopyrazines are contacted with liquid ketones of the structure R1 --CH2 --CO--CH2 --R2, wherein R1 and R2 are both H or together constitute a polymethylene chain of from 2 to 4 carbons. The isomeric 2,6-diamino-dihalopyrazines dissolve in the ketones. Thus, mixtures of the solid 2,3-diamino-dihalopyrazines with their isomers and/or other ketone-soluble materials can be resolved by contacting the mixtures with ketones of the preceding structure and separating the resultant solid and liquid phases. The association products constitute a novel composition of matter.
