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An enantiospecific and diversity oriented approach to a range of functionalized eudesmane, nor-, iso-, and dihydroagarofuran frameworks from (−)-carvone is delineated. The cornerstone of this approach is the installation of the quaternary carbon center through reductive opening of the carvone epoxide and setting-up of RCM reaction to generate the bicyclic eudesmane framework. Various options like...
A strategy for achieving enantiodivergency from R-(−)-carvone in the context of synthesis of eudesmanes and dihydroagarofurans is disclosed, which involves, among other things, sequential setting of the C10 quaternary centre and recreation of the desired C7 isopropyl stereochemistry to enter the antipodal series. A synthesis of 1-deacetoxy-ent-orbiculin has been achieved as a demonstration of the...
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