Identification of a Grain Beetle Macrolide Pheromone and Its Synthesis by Ring-Closing Metathesis Using a Terminal Alkyne
作者:Susann Hötling、Celine Bittner、Matthias Tamm、Sonja Dähn、Jana Collatz、Johannes L. M. Steidle、Stefan Schulz
DOI:10.1021/acs.orglett.5b02461
日期:2015.10.16
A major C18-macrolide was found during analysis of the frass of the storage beetle Oryzaephilus surinamensis to be (9Z,12Z,15R)-octadeca-9,12-dien-15-olide (10, cucujolide XI). The synthesis used ring-closing alkyne metathesis as a key step. The highly active 2,4,6-trimethylbenzylidyne molybdenum complex [MesCMoOC(CF3)2Me}3] (12) allowed the use of a terminal alkyne and afforded the product in excellent
分析储藏甲虫Orinzaephilus surinamensis的茎时,发现主要的C 18-大环内酯为(9 Z,12 Z,15 R)-octadeca-9,12-dien-15-内酰胺(10,cucujolide XI)。该合成使用闭环炔烃复分解作为关键步骤。高活性的2,4,6-三甲基亚苄基钼络合物[MesCMo OC(CF 3)2 Me} 3 ](12)允许使用末端炔,并以优异的产率提供了产物。生物测定法证明了R-对映体10的活性在甲虫的聚集中。Cucujolide XI是第一个在ω-4位置被氧化的大环内酯信息素。