Preparation of two novel spermine alkalo
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Bassem F. Tawil; Armin Guggisberg; Manfred Hesse
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Article
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1990
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Elsevier Science
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English
โ 527 KB
The E/Z photo-isomerisation behaviour of the cinnamoyl chromophore in some cyclic polyamine alkaloids was investigated. Under daylight laboratory conditions, the alkaloid iso-18-O-methylchaenorpine (3) with an E-double bond isomerises gradually to the Z-form 18-0-methylchaenorpie (1). This can be en