Process for the preparation of 11-oxaprostaglandins and...

Details Process for the preparation of 11-oxaprostaglandins and... Process for the preparation of 11-oxaprostaglandins and...

2005-05-24

2005-05-24

Trinh, Ba K. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S214000, C549S475000, C549S478000, C549S497000

Reexamination Certificate

active

06897324

ABSTRACT:
For the preparation of an 11-oxaprostaglandin such as [2R,(1E,3R),3S,(4Z),4R)]-7-{tetrahydro-2-[4-(3-chlorophenoxy)-3-hydroxy-1-butenyl]-4-hydroxy-3-furanyl}-4-heptenoic acid and its ester derivatives, a novel process uses a novel enantiomerically enriched compound for formula (1) wherein the bond between carbon atoms y and z is either a single or double bond; R1is selected from vinyl, trialkylsilylethynyl, a formyl group protected as an acetal, or a protected hydroxymethyl group; R2is C1-5alkyl, optionally substituted at the terminus with an aryloxy or alkoxy group; and R3-R6are independently selected from C1-6alkyl and C6-10aryl

REFERENCES:
patent: 0 299 914 (1989-01-01), None
patent: 9002553 (1990-03-01), None

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