New 3-Alkylpyridines from Three Mediterranean Cephalaspidean Molluscs: Structure, Ecological Role and Taxonomic Relevance
摘要:
Seven new 3-alkylpyridines, showing alarm pheromone activity, have been isolated from three Haminoea cephalaspidean molluscs: H. orteai, H. orbignyana and H. fusari. Structures were elucidated by spectral analysis; absolute stereochemistry was determined by applying Mosher's method.
Enantioselective synthesis of haminol-1, an alarm pheromone of a mediterranean mollusc
摘要:
The first enantioselective synthesis of (-)-(R)-haminol-1 is described in this paper. The chiral part of the molecule was prepared by reduction of an optically active beta-ketosulfoxide. The all-trans trienic part was stereoselectively synthesized via reductive elimination of a 1,6-dibenzoate-2,4-diene with sodium amalgam. (C) 1997 Elsevier Science Ltd.