“…Conjugated dienes and polyenes are one of the main building blocks in organic chemistry and represent fundamental structural motifs in a wide range of natural products as well as in bioactive molecules. 1 Some representative examples containing conjugated dienes are vitamin A, 2 lissoclinolide, 3 abscisic acid, 4 macrolactin A, 5 lactimidomycin, 6 modiolin, 7 etc . (Fig.…”