Methods to prepare .beta..beta.'-dihydroxy meso-substituted chlorins, isobacteriochlorins and bacteriochlorins
US5831088A · kind A · utility
24Cited by
1References
15Claims
0Family size
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Key dates
| Filing date | May 8, 1997 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/22
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A .beta.,.beta.'-dihydroxy meso-substituted chlorin, bacteriochlorin or isobacteriochlorin compound having the formula (I) or (II): ##STR1## wherein M is a metal. A novel method for synthesizing the compound of formula (I) or (II) comprises the steps of: PA1 a. osmylating a .beta...beta.'-unsubstituted, meso-substituted porphyrin to form an osmate ester at the .beta.,.beta.'-position, and PA1 b. reducing the osmate ester to form the corresponding .beta.,.beta.'-dihydroxy meso-substituted chlorin, bacteriochlorin or isobacteriochlorin of formula (I) or (II).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.