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Enantiospecific synthesis of isomeric8,9,12-trihydroxyeicosa-5(Z),10(E),14(Z)-trienoic acids

✍ Scribed by Pendri Yadagiri; Dong-Soo Shin; J.R. Falck


Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
253 KB
Volume
29
Category
Article
ISSN
0040-4039

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✦ Synopsis


Five stereoisomers of trio1 2, an arachidonic acid metabolite isolated from platelets, were prepared using a convergent strategy based on 8-oxido ylide homologation of a carbohydrate-derived precursor. Trioxilins 2 and 3 were isolated initially from mammalian platelets by Jones et al1 who proposed that they arise from 12(S)-hydroperoxyeicosatetraenoic acid via rearrangement to oxiranyl carbinol 1 and subsequent hydration. The structure of 1, now known as hepoxilin A31 was established as 8(R/S)-hydroxy-ll(S),12(S)-epoxyeicosa-5(Z),lO(E),14(Z)-trienoic


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Synthesis of (9Z,12E)- and (9E,12Z)-[1-1
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3Z,6E)-l-Bromododeca-3,6-diene, a common intermediate in the synthesis of labelled 12t linoleic acid and 14t arachidonic acid, was obtained from (E)-3-nonyl-l-ol, in four steps, via conventional functional manipulations. Cross-coupling of this bromododecadiene with the Grignard reagent of l-chloro-5