Synthesis of Enantiomerically Pure Pheromones of South‐Pacific Brown Algae: Hormosirene and Dictyopterene A
- 14 August 1985
- journal article
- research article
- Published by Wiley in Helvetica Chimica Acta
- Vol. 68 (5), 1186-1192
- https://doi.org/10.1002/hlca.19850680514
Abstract
Hormosirene ((−)‐1; (1R,2R)‐1‐((1E,3Z)‐1,3‐hexadienyl)‐2‐vinylcyclopropane) is the specific sex attractant of several brown algae of the Australian shelf, while dictyopterene A ((+)‐2; (1R, 2R)‐1‐((1E)‐1‐hexenyl)‐2‐vinylcyclopropane) is found as a minor constituent of the pheromone bouquets. The asymmetric synthesis of the two hydrocarbons is performed by resolution of the amides (−)‐5 and (+)‐5a obtained from (−)‐(R)‐2‐phenylglycinol and racemic trans‐vinylcyclopropanecarboxylic acid (rac‐4) on silica gel. Both diastereoisomers are obtained optically pure. They are converted by stereoselective Wittig olefination into the title compounds. Compound (−)‐1 is the active mating pheromone of the reproductive system of the seaweed Xiphophora chondrophylla as established by biological‐activity assays.This publication has 18 references indexed in Scilit:
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