Process for the preparation of a protoporphyrin
US5693789A · kind A · utility
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3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for the preparation of BPD 1,4-diene diester A-ring comprising reacting hematoporphyrin IX dimethyl ester with dimethyl acetylenedicarboxylate followed by purification of the product by a series of fractional crystallizations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.