tubulosine/carapichea ipecacuanha

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Molecular modeling study of tubulosine and other related ipecac alkaloids.

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Prijava / prijava

A molecular modeling study of two alkaloids, tubulosine and psychotrine, isolated from the sap of Pogonopus speciosus, and other related ipecac alkaloids, showed that these flexible alkaloids favor a nonplanar structure. The biologically active compounds had conformations with a similar angle

[Partial disorganization of the anaphasic segregation of chromosomes in plant cells: combined actions of griseofulvin, producer of pluripolar anaphases and 2 ipecac alkaloids, producers of floating pole anaphases].

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Prijava / prijava

Anaphasis may be slightly checked by various treatments which however result in a normal chromosomic separation. Griseofulvin exerts a direct though partial influence on the mitotic apparatus, which entails "pluripolar anaphasis"; on the other hand Ipecac alkaloïds act indirectly and produce

A stereodivergent strategy for the preparation of corynantheine and ipecac alkaloids, their epimers, and analogues: efficient total synthesis of (-)-dihydrocorynantheol, (-)-corynantheol, (-)-protoemetinol, (-)-corynantheal, (-)-protoemetine, and related natural and nonnatural compounds.

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Prijava / prijava

Here we present a general and common catalytic asymmetric strategy for the total and formal synthesis of a broad number of optically active natural products from the corynantheine and ipecac alkaloid families, for example, indolo[2,3-a]- and benzo[a]quinolizidines. Construction of the core alkaloid

Structural basis for the inhibition of protein biosynthesis: mode of action of tubulosine.

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A structural model for the inhibition of protein biosynthesis was previously formulated on the basis of a topochemical analogy between the ipecac alkaloids and the glutarimide antibiotics. The structure of tubulosine satisfies the requirements of this model. The prediction that such a compound would

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Herbal & Natural Medicine

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