Search results for "Methyl thyrsiflorin B acetate"

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1H and 13C NMR signal assignment of synthetic (-)-methyl thyrsiflorin B acetate, (-)-thyrsiflorin C and several scopadulane derivatives.

2005

The 1H and 13C NMR signal assignment of the data of 13 scopadulane-type diterpenes is reported. It was based on one- and two- dimensional NMR techniques which included 1H, 13C, DEPT, HMQC and 1D NOE difference spectroscopy. Copyright © 2005 John Wiley & Sons, Ltd.

Methyl thyrsiflorin B acetateCarbon IsotopesMagnetic Resonance SpectroscopyStereochemistryChemistryMolecular ConformationStereoisomerismGeneral ChemistryCarbon-13 NMRDEPTReference StandardsSignalThyrsiflorin CProton NMRGeneral Materials ScienceDiterpenesProtonsSpectroscopyMagnetic resonance in chemistry : MRC
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First Diastereoselective Synthesis of (−)-Methyl Thyrsiflorin A, (−)-Methyl Thyrsiflorin B Acetate, and (−)-Thyrsiflorin C

2000

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 diastereoselective synthesis of (-)-methyl thyrsiflorin A (8), (-)-methyl thyrsiflorin B acetate (9), and (-)-thyrsiflorin C (7). Key steps in our strategy are the intramolecular cyclopropanation of diazoketone 19 and the regioselective cleavage of the cyclopropane ring.

Methyl thyrsiflorin B acetatePlants MedicinalMolecular StructureCyclopropanationSpectrum AnalysisOrganic ChemistryRegioselectivityStereoisomerismRing (chemistry)Cleavage (embryo)Medicinal chemistryCyclopropanechemistry.chemical_compoundThyrsiflorin CchemistryIntramolecular forceDiterpenesThe Journal of Organic Chemistry
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