Process for the preparation of E-prostaglandins
US5648526A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Object: To produce E-prostaglandins in a high yield and in a short time with suppressed formation of isomers. Structure: A process for preparing E-prostaglandins represented by the formula: ##STR1## (wherein A, R.sup.6 and R.sup.7 represent respectively an arbitrary group which does not participate in the reaction; B represents a vinylene or ethynylene group; and R.sup.4 and R.sup.5 may be the same or different from each other and each represents a hydrogen atom or a protective group of the hydroxyl group) which comprises reacting allyl esters of E-prostaglandins represented by the formula: ##STR2## (wherein R.sup.1 and R.sup.2 may be the same or different from each other and each represents a hydrogen atom or a lower alkyl group; R.sup.3 represents a hydrogen atom, a lower alkyl group, an alkenyl group or an aryl group; and A, B, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are as defined above) with at least one substance selected from the group consisting of bases and formic acid in the presence of a zero- or divalent palladium complex or a salt thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.