Process for the preparation of 4,10β-diacetoxy-2α-benzoyloxy-5β,20-epoxy-1,13α-dihydroxy-9-oxo-19-norcyclopropa[g]tax-11-ene
US6956124B2 · kind B2 · utility
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Key dates
| Filing date | Apr 14, 2004 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Apr 14, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D305/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of 4-acetoxy-2α-benzoyloxy-5β,20-epoxy-1,13α-dihydroxy-9-oxo-19-norcyclopropa[g] tax-11-ene from 4-acetoxy-2α-benzoyloxy-5β,20-epoxy-1,13α-dihydroxy-9-oxo-7β-(trifluoromethyl sulfonyloxy) tax-11-ene by reaction with a molecular sieve in sulfolane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.