Desmarestene 1 6‐(1Z,3‐butadienyl)‐1,4‐cycloheptadiene and viridiene 3 cis‐3‐(1Z, 3‐butadienyl)‐4‐vinylcyclopentene are chemical messengers for male gametes of the brown algae Desmarestia aculeate and Desmarestia viridis. Total syntheses of 1, 3 and their stereoisomers 1a, 3a‐c are reported. Gas‐chromatographic comparison of synthetic 1 and 3 with the corresponding natural products has established their structural identity.
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Boland et al. (1982) studied this question.
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