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Studies toward the total synthesis of axinellamine and massadine.

Research paper by Rasapalli R Sivappa, Nora M NM Hernandez, Yong Y He, Carl J CJ Lovely

Indexed on: 07 Sep '07Published on: 07 Sep '07Published in: Organic Letters



Abstract

Intramolecular Diels-Alder reactions of several N-O linked 4-vinylimidazole dimers provide the expected adduct in moderate to good yield as a single, all trans stereoisomer, along with smaller amounts of the inverse electron demand adduct. Oxidative rearrangement of the cycloadducts occurs on treatment with Davis' reagent, providing a single spiro imidazolone in good yield and with excellent levels of stereocontrol albeit epimeric at the spiro center found in axinellamine and massadine.