Natural acetylenes. Part XXXII. A synthesis of crepenynic acid (octadec-9-en-12-ynoic acid)

Abstract
Methyl crepenynate has been synthesised from non-3-yn-1-yl-triphenylphosphonium bromide (obtained from hept-1-yne via non-3-yn-1-ol and 1-bromonon-3-yne) and the C9 aldehyde-ester with butyl-lithiumin ether, and from it crepenynic acid was obtained by alkaline hydrolysis.

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