Process of preparing 2,2'-(1-methyl-1,2-ethanediylidene)bishydrazine caroximidamide!
US5693673A · kind A · utility
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6Claims
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Key dates
| Filing date | May 30, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | May 30, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of 2,2'-(1-methyl 1,2-ethanediylidene)bishydrazine carboximidamide! by: PA1 a) reacting aminoguanidine hydrochloride with methylglyoxal aldehyde or methylglyoxal dimethyl acetal; and PA1 b) purifying the 2,2'-(1-methyl-1,2-ethanediylidene)bishydrazine carboximidamide! by crystallization from an acidic aqueous-isopropyl alcohol medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.