Racemic 5,9-dimethylpentadecane and 5,9-dimethylhexadecane, the major and minor constituents, respectively, of the sex pheromone of Leucoptera coffeella, have been synthesized from citronellol in 56-58% overall yield through six steps. Ultrasound irradiation efficiently supported tosylation of alcohols (two steps) as well as the subsequent cross coupling reactions with the pertinent Grignard reagents (also two steps).
Process and agents for control of white coffee-leaf miners, especially
申请人:BASF Aktiengesellschaft
公开号:US05053223A1
公开(公告)日:1991-10-01
5,9-Dimethylpentadecane (I) and 5,9-dimethylhexadecane (II) and their use in agents for the control of the white coffee-leaf miner, Perileucoptera coffeella, particularly by the confusion technique.
Unsymmetrical double Wittig olefination on the syntheses of insect pheromones. Part 1: Synthesis of 5,9-dimethylpentadecane, the sexual pheromone of Leucoptera coffeella
作者:Paulo H.G. Zarbin、Jefferson L. Princival、Eraldo R. de Lima、Alcindo A. dos Santos、Bianca G. Ambrogio、Alfredo R.M. de Oliveira
DOI:10.1016/j.tetlet.2003.10.183
日期:2004.1
three-step synthesis of a mixture of stereoisomers of 5,9-dimethylpentadecane 1, the sexual pheromone of the coffee leaf miner Leucoptera coffeella, is described. The route employs an unsymmetrical double Wittig olefination to build the carbon skeleton of the molecule, as the key reaction. The bis-phosphonium salt 3, derived from 1,3-dibromopropane 2, reacted ‘one-pot’ with the ketones 2-octanone and