8, 13a-Propanoberbines. V. Michael Type Condensation of Acetoneberberine Type Enamine

8, 13a-Propanoberbines. V. Michael Type Condensation of Acetoneberberine Type Enamine

It has been found that the crude acetone adducts of quaternary protoberberinium salts, dehydrocorydalinium chloride (I), 13-methylberberinium chloride (VI) and berberi-nium chloride (VII), were contaminated with about a few per cent of 8, 13a-propanoberbine derivatives, III, X and XI, respectively,...

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Veröffentlicht in:Chemical & pharmaceutical bulletin 1975/07/25, Vol.23(7), pp.1565-1572
Hauptverfasser: NARUTO, SHUNSUKE, NISHIMURA, HARUKI, KANEKO, HIDEHIKO
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container_issue 7
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container_title Chemical & pharmaceutical bulletin
container_volume 23
creator NARUTO, SHUNSUKE
NISHIMURA, HARUKI
KANEKO, HIDEHIKO
description It has been found that the crude acetone adducts of quaternary protoberberinium salts, dehydrocorydalinium chloride (I), 13-methylberberinium chloride (VI) and berberi-nium chloride (VII), were contaminated with about a few per cent of 8, 13a-propanoberbine derivatives, III, X and XI, respectively, as a result of intramolecular Michael condensation of each acetone adduct. The presence of these compounds was deduced from the direct isolation or from the product analysis of the reaction using a crude acetone adduct as a starting material.
doi_str_mv 10.1248/cpb.23.1565
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title 8, 13a-Propanoberbines. V. Michael Type Condensation of Acetoneberberine Type Enamine
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