Mimicking the pineapple scent: Synthesis and properties of (semi)conjugated triene carbonyl derivatives
作者:Peter Šiška、Daniela Danková、Dária Nitrayová、Peter Fodran、Ivan Špánik、Peter Szolcsányi
DOI:10.1080/00397911.2017.1336559
日期:2017.9.2
ABSTRACT The unexpected formation of previously nondescribed (semi)conjugated ethyl trienoate revealed its powerful aroma of fresh pineapple. Thus, we have designed, prepared and evaluated a set of its carbonyl analogues as mixtures of (E/Z)-isomers. Although their synthesis from natural ocimene led to target compounds in low yields, optimized preparation from geranyl acetate furnished an aldehyde
摘要 先前未描述的(半)共轭三烯酸乙酯的意外形成揭示了其新鲜菠萝的强烈香气。因此,我们设计、制备并评估了一组其羰基类似物作为 (E/Z) 异构体的混合物。尽管它们从天然罗勒烯合成导致目标化合物产率低,但从乙酸香叶酯优化制备提供了醛作为多克规模的高产普通中间体。其一系列 Wittig 烯化反应提供了相应的 (E,E) 构型羰基二烯。最终酸催化消除烯丙基乙酸酯以中等产率提供了所需的“菠萝”目标。感官分析表明,只有母体化合物具有典型的菠萝香气。尽管类似的 tBu- 和/或 Bn-酯具有额外的绿色音符,最相似的 Me-ester 的不同之处在于其清新的木香,类似于甲基酮。图形概要