Compositions for photodynamic therapy
US5238940A · kind A · utility
31Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1991 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Sep 30, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/61
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods to prepare intermediates for the conjugation of active ingredients to hydrophilic carriers are described. The polyhydroxylated carriers are first derivatized to convert the hydroxyls to leaving groups and then reacted with an alkylene diamine in the presence of a reducing agent. The resulting derivatized carrier can then be coupled to substituents containing carboxyl groups in the presence of dehydrating agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.