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).
使用超声波照射,从
香茅醇合成了主要的和次要的性信息素成分,
梨小食心虫性信息素的消旋5,9-二甲基
十五烷和5,9-二甲基
十六烷,总产率为56-58%,经过六个步骤。超声波照射有效地促进了醇的
甲苯磺酰化(两步)以及随后与相应的
格氏试剂的交叉偶联反应(也是两步)。