Abstract: A semisynthetic method of preparing neosaxitoxin from cultures of the dinoflagellate Gymnodinium catenatum is described. The scalable method includes the reductive desulfonation of an unresolved mixture of toxin C3 and toxin C4 and mild acid hydrolysis of the resulting gonyautoxin 6 (GTX6) to provide the neosaxitoxin.

Abstract: Semisynthetic methods of preparing neosaxitoxin from cultures of the dinoflagellates Alexandrium pacificum and Gymnodinium catenatum are described. The scalable method includes the reductive desulfonation of an unresolved mixture of gonyautoxin 1 (GTX1) and gonyautoxin 4 (GTX4) using dithiol in a buffered reaction solvent at a pH of about 7.5.

Abstract: A method of preparing neosaxitoxin in quantities of a purity sufficient to allow the compound to be used as an active pharmaceutical ingredient (API) is described. The method includes the reductive desulfonation of an unresolved mixture of gonyautoxin 1 (GTX1) and gonyautoxin 4 (GTX4).

Abstract: The invention relates to novel bioactive polycyclic ether compounds comprising a spiro-linked five-membered cyclic imine. In particular, the invention relates to a compound designated portimine, its congeners and the use of these compounds in anticancer therapy. In a second aspect the invention provides a pharmaceutical preparation comprising as active ingredient a congener of the first aspect of the invention. Preferably, the pharmaceutical preparation is indicated for use in the treatment of subjects with neoplasia. More preferably, the pharmaceutical preparation is indicated for use in the treatment of subjects with lymphoid malignancies. Preferably, the lymphoid malignancies are selected from the group consisting of: chronic lymphocytic leukaemia (CLL) and pediatric acute lymphoblastic leukaemia (ALL).

Abstract: A method of preparing neosaxitoxin in quantities of a purity sufficient to allow the compound to be used as an active pharmaceutical ingredient (API) is described. The method includes the reductive desulfonation of an unresolved mixture of gonyautoxin 1 (GTX1) and gonyautoxin 4 (GTX4).

Abstract: The present invention relates to methods of preparing loline alkaloids, compositions comprising loline alkaloids including pesticidal compositions, and uses of the compositions including uses as biological control agents. Methods for the control of pests, including plant or animal pests, and for the enhancement of plant growth or reproduction, and treatment and prevention of insect infection and infestation, for example in plants and animals, are also provided.

Abstract: A method of preparing neosaxitoxin in quantities of a purity sufficient to allow the compound to be used as an active pharmaceutical ingredient (API) is described. The method includes the reductive desulfonation of an unresolved mixture of gonyautoxin 1 (GTX1) and gonyautoxin 4 (GTX4).

Abstract: A method of preparing neosaxitoxin in quantities of a purity sufficient to allow the compound to be used as an active pharmaceutical ingredient (API) is described. The method includes the reductive desulfonation of an unresolved mixture of gonyautoxin 1 (GTX1) and gonyautoxin 4 (GTX4).

Abstract: The invention relates to novel bioactive polycyclic ether compounds comprising a spiro-linked five-membered cyclic imine. In particular, the invention relates to a compound designated portimine, its congeners and the use of these compounds in anticancer therapy. In a second aspect the invention provides a pharmaceutical preparation comprising as active ingredient a congener of the first aspect of the invention. Preferably, the pharmaceutical preparation is indicated for use in the treatment of subjects with neoplasia. More preferably, the pharmaceutical preparation is indicated for use in the treatment of subjects with lymphoid malignancies. Preferably, the lymphoid malignancies are selected from the group consisting of: chronic lymphocytic leukaemia (CLL) and pediatric acute lymphoblastic leukaemia (ALL).

Abstract: Congener of portimine of the structure: where: R1 is selected from H, acyl, alkyl, alkylene, aryl and aralkyl; R2 is selected from H, acyl, alkyl, alkylene, aryl and aralkyl; M is O, S, N—NH2, N(alkyl)2, N-alkoxy or N(aryl)2; W and X may form a bond, an epoxide, or are independently selected from H, halogen, OH and O-acyl. Y and Z form a bond, an epoxide, or are independently selected from H, halogen (X), OH and O-acyl; and R1 and R2 are not H, M is not O, or W and X or Y and Z do not form a bond.

Abstract: The present invention relates to methods of preparing loline alkaloids, compositions comprising loline alkaloids including pesticidal compositions, and uses of the compositions including uses as biological control agents. Methods for the control of pests, including plant or animal pests, and for the enhancement of plant growth or reproduction, and treatment and prevention of in sect infection and infestation, for example in plants and animals, are also provided.

Abstract: The invention relates to novel bioactive polycyclic ether compounds comprising a spiro-linked five-membered cyclic imine. In particular, the invention relates to a compound designated portimine, its congeners and the use of these compounds in anti-cancer therapy.

Abstract: Antimicrobial compounds from Epicoccum purpurascens (syn. E. negrum) for use against plant and fungi pathogens. An orange yellow metabolite was isolated, the structure elucidated as a small group of compounds Epipyrone A-C and fungicidal activity demonstrated against plant pathogens, for example Botrytis cinerea and Lecanicillium muscarium. Agricultrual and pharmaceutical compositions are provide, and use thereof in treating microbial infections in an animal or plant are also provided.

Abstract: Antimicrobial compounds from Epicoccum purpurascens (syn. E. negrum) for use against plant and fungi pathogens. An orange yellow metabolite was isolated, the structure elucidated as a small group of compounds Epipyrone A-C and fungicidal activity demonstrated against plant pathogens, for example Botrytis cinerea and Lecanicillium muscarium. Agricultrual and pharmaceutical compositions are provide, and use thereof in treating microbial infections in an animal or plant are also provided.

Abstract: Antimicrobial compounds from Epicoccum purpurascens (syn. E. negrum) for use against plant and fungi pathogens. An orange yellow metabolite was isolated, the structure elucidated as a small group of compounds Epipyrone A-C and fungicidal activity demonstrated against plant pathogens, for example Botrytis cinerea and Lecanicillium muscarium. Agricultural and pharmaceutical compositions are provided, and use thereof in treating microbial infections in an animal or plant are also provided.

Abstract: Antimicrobial compounds from Epicoccum purpurascens (syn. E. negrum) for use against plant and fungi pathogens. An orange yellow metabolite was isolated, the structure elucidated as a small group of compounds Epipyrone A-C and fungicidal activity demonstrated against plant pathogens, for example Botrytis cinerea and Lecanicillium muscarium. Agricultural and pharmaceutical compositions are provide, and use thereof in treating microbial infections in an animal or plant are also provided.