2-Amino-1-(5-amino-1H-imidazol-4-yl)ethanone and method of preparation
US4117229A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Oct 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Amino-1-(5-amino-1H-imidazol-4-yl)ethanone, 6,7-dihydroimidazo[4,5-d][1,3]diazepin-8(3H)-one and acid-addition salts thereof are disclosed. 2-Amino-1-(5-amino-1H-imidazol-4-yl)ethanone and its acid-addition salts are prepared by catalytically reducing an acid-addition salt of 2-amino-1-[5-amino-1-(protected)-1H-imidazol-4-yl]ethanone. 6,7-Dihydroimidazo[4,5-d][1,3]-diazepin-8(3H)-one and its acid-addition salts are prepared by reacting an acid-addition salt of 2-amino-1-(5-amino-1H-imidazol-4-yl)ethanone with a compound able to contribute a formyl group. The later product may subsequently be converted into (R)-3-(2-deoxy-.beta.-D-erythro-pentofuranosyl)-3,6,7,8-tetrahydroimidazo[ 4,5-d][1,3]diazepin-8-ol. Furanose derivatives of 6,7-dihydroimidazo[4,5-d][1,3]diazepine are also disclosed and their methods of preparation. Lastly, a method for resolving an isomer mixture of 3-(2-deoxy-.beta.-D-erythro-pentafuranosyl)-3,6,7,8-tetrahydroimidazo[4 ,5-d][1,3]diazepin-8-ol compounds is related.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.