Process of preparing mono-O-.beta.-hydroxyethyl-7 rutoside
US4153788A · kind A · utility
4Cited by
3References
7Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 7, 1977 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | Mar 7, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07H17/07
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is provided for preparing mono-O-.beta.-hydroxyethyl-7-rutoside of the formula: ##STR1## which comprises contacting rutoside of the formula: ##STR2## in a solvent which is an at least partially aqueous medium with a boric acid alkali salt in an amount substantially not exceeding the amount necessary to form a boron complex of formula: reacting said boron complex with ethylene oxide to form a hydroxyethoxy compound of the formula ##STR3## and treating said hydroxyethoxy compound in an at least partially aqueous acid medium, whereby there is produced said mono-O-.beta.-hydroxyethyl-7-rutoside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.