Method for preparing 4β-amino-4′-demethyl-4-desoxypodophyllotoxin
US7932406B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jul 19, 2006 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Jan 16, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D493/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for synthesizing 4.beta.-amino-4′-demethyl-4-desoxypodophyllotoxin of formula (1), characterized by comprising the following successive steps: a) reacting, in a pure weak acid or in a mixture consisting of acid, water and of organic solvent, without another solvent, at a temperature higher than the ambient temperature, thiourea with 4.beta.-halogenoacetamido-4′-demethyl-4-desoxypodophyllotoxin, and; b) recovering the 4.beta.-amino-4′-demethyl-4-desoxypodophyllotoxin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.