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À propos de : First Diastereoselective Synthesis of (−)-Methyl Thyrsiflorin A,(−)-Methyl Thyrsiflorin B Acetate, and (−)-Thyrsiflorin C        

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  • First Diastereoselective Synthesis of (−)-Methyl Thyrsiflorin A,(−)-Methyl Thyrsiflorin B Acetate, and (−)-Thyrsiflorin C
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  • An efficient procedure for the synthesis of scopadulan diterpenes, using (+)-podocarp-8(14)-en-13-one 13 as starting material, is reported. This procedure has been used for the diastereoselectivesynthesis of (−)-methyl thyrsiflorin A (8), (−)-methyl thyrsiflorin B acetate (9), and (−)-thyrsiflorinC (7). Key steps in our strategy are the intramolecular cyclopropanation of diazoketone 19 and theregioselective cleavage of the cyclopropane ring.
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