Add time:09/24/2019         Source:sciencedirect.com

Two novel Michael adducts 9α-cyano-15,16-epoxy-7β-hydroxylabda-13(16),14-dien-6-one (2) and 9α-cyano-15,16-epoxy-7-hydroxylabda-7,13(16),14-trien-6-one (3) and the reduction product of 2, 9α-cyano-15,16-epoxy-6β,7β-dihydroxylabda-13(16),14-diene (4), were synthesized from the naturally occurring labdane diterpene hispanolone (1). Compounds 2–4 exhibited in planta activity against the pathogenic rice blast fungus Magnaporthe grisea.

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