Journal of Medicinal Chemistry p. 193 - 197 (1987)
Update date:2022-07-31
Topics:
Collins, Paul W.
Kramer, Steven W.
Gasiecki, Alan F.
Weier, Richard M.
Jones, Peter H.
et al.
A stereospecific synthesis and the gastric antisecretory and diarrheal activity of a 3E,5Z diene analogue of misoprostol are described.The key intermediate in the synthesis was an α chain truncated acetylene that was obtained by a cuprate/enolate capture procedure on the corresponding cyclopentenone.Palladium-catalyzed coupling of the acetylene with methyl 4-iodo-3(E)-butenoate provided the conjugated enyne.Although selected hydrogenation of the enyne with Lindlar catalyst failed, the desired 3E,5Z diene was obtained with P-2 nickel as a catalyst.The diene was about 3 times more potent than misoprostol in inhibiting gastric acid secretion in dogs and also in producing diarrhea in rats.
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