Acid anhydrides, their preparation and their use
US5606068A · kind A · utility
4Cited by
0References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1996 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Feb 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to novel anhydrides of general formula (I), ##STR1## wherein Ar is an aryl radical, and either R.sub.1 is C.sub.6 H.sub.5 --CO or (CH.sub.3).sub.3 C--O--CO, R.sub.2 is a hydrogen atom and R.sub.3 is a hydroxy function protective grouping, or R.sub.1 is (CH.sub.3).sub.3 C--O--CO and R.sub.2 together form a saturated 5 or 6-membered heterocyclic ring; preparation thereof; and uses thereof for preparing taxane derivatives having general formula (III), ##STR2## wherein R=H, acetyl; R.sub.1 is C.sub.6 --H.sub.5 --CO or (CH.sub.3).sub.3 C--O--CO), and having antitumoral properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.