Total Synthesis of Benzo[c]phenanthridine Alkaloids Based on a Microwave-Assisted Electrocyclic Reaction of the Aza 6π-Electron System and Structural Revision of Broussonpapyrine. -Eight compounds of type (II) are prepared as precursors of the alkaloids from benzaldoxime methyl ethers of type (I) by the title reaction as key step. The exact structure of broussonpapyrine (III) reported by Qin et al. is determined to be the known structure of chelerythrine (IV). -(ISHIHARA, Y.; AZUMA, S.; CHOSHI*, T.; KOHNO, K.; ONO, K.; TSUTSUMI, H.; ISHIZU, T.; HIBINO, S.; Tetrahedron 67 (2011) 6, 1320-1333, http://dx.
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