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Irradiation of the berberinephenolbetaine in a stream of argon produced the 8,14-cycloberberines [1]. On treatment with ethylchloroformate $C_8-N$ bond cleavage of the compound [1] occurred, accompanied with dehydrochlorination to give 7-ethylcarboxyisoquinoline [3], and the product [3] treated with strong alkali solution to give the 13-oxonorotensane [4] in 64% yield. Irradiation of the compound [4] converted easily to dihydro-8H-dibenzo[a, g] quinolizine-8-one [5]. and then the compound [5] was treated with methyliodide to give the 8-oxo-quinolizinium methiode. The intermediate colume chromatography on IRA-400 afforded the benzo[c, g]azecine-5-one[6] in 63% yield. The results of biological activities for these compounds are also presented.
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