Process for producing hexahydrothieno[3,4-D]imidazole-2,4-diones
US5969149A · kind A · utility
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Key dates
| Filing date | Sep 28, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Sep 28, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D495/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for producing hexahydrothieno[3,4-d]imidazole-2,4-diones of the formula (1): wherein R is the same or different and represents a lower alkyl group, an alkenyl group, an aryl group or an aralkyl group all of which may be substituted, which is characterized by the step of reacting hexahydrofuro[3,4-d]imidazole-2,4-diones of the formula (2): ##STR1## wherein R has the same meaning as described above with hydrogen sulfide in the presence of a basic compound and sulfur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.