Recemic (3R, 4S/3S, 4R)-faranal, has been synthesised by a convergent, stereospecific route from (1E, 5Z)-1-iodo-2, 6-dimethylocta-1,5-diene in good overall yield; this synthesis employed the addition of alkylcopper complexes to terminal acetylenes to generate the two trisubstituted double bonds, and a Diels–Alder reaction to establish the relative configuration of the C-3, C-4 methyl groups.
通过(1 E,5 Z)-1- iodo-2,6-二甲基辛基-1,5-二烯(1 E,5 Z)-1-iodo-2的会聚立体定向途径合成残基(3 R,4 S / 3 S,4 R)-法呢总体产量高;该合成方法是在末端
乙炔上添加烷基
铜配合物以生成两个三取代的双键,并通过狄尔斯-阿尔德反应建立C -3,C -4甲基的相对构型。