SHORT CHIRAL SYNTHESES OF MORPHINAN AND RELATED SYSTEMS
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Morphine and its derivatives continue to challenge the creativity of synthetic chemists. The aim of this research is to execute a short chiral synthesis of the morphinan system. Chirality is introduced via asymmetric reduction; the key step is the formation of four rings- the tetracyclic phenanthrofuran by an intramolecular Diels-Alder cycloaddition. The fifth ring was completed by three different methods, and three different pentahydrophenanthrofuran systems were obtained.
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Jihong Gao (2008). SHORT CHIRAL SYNTHESES OF MORPHINAN AND RELATED SYSTEMS. UWSpace. http://hdl.handle.net/10012/3586