Synthesis of a Few Trimethoxyoxoaporphines

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Abstract
Unknown compounds, 2,3,9- and 1,2,9-Trimethoxyoxoaporphine were synthesized via Bischler-Napieralski reaction and Pschorr reaction. 1,2,10-Trimethoxyoxoaporphine was prepared from the corresponding dehydroaporphine by oxidation with peracid. Since the physical properties of the compound are not consistent with the reported data, the structure proposed for a product which was obtained by cleavage reaction with sodium in liquid ammonia of dehydrothalicarpine may be uncorrect.

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