Synthesis of oryzalexins a,b and c,the diterpenoidal phytoalexins isolated from rice blast leaves infected with pyricularia oryzae |
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| Authors: | Kenji Mori Michiru Waku |
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| Institution: | Department of Agricultural Chemistry, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113, Japan |
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| Abstract: | Naturally occurring enantiomers of three diterpenes isolated as phytoalexins from rice blast leaves were synthesized: (+)-oryzalexin.A ent-3β-hydroxyisopimara-8(14),15-dien-7-one, 1], (+)-oryzalexin B ent-7α-hydroxyisopimara-8(14),15-dien-3-one, 2] and (+)-oryzalexin C ent-isopimara-8(14),15-diene-3,7-dione, 3]. Their antipodes were also synthesized. |
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