Phyton Holdings, LLC

Natural Pharmaceuticals, Inc.

Natural Pharmaccuticals, Inc.

Roland R Franke

Rex T Gallagher

James Harvey Johnson

John S Juchum

Dong S Yang

Christopher D Howe

Brian A Bucher

Barry Joseph Hand

Edward M Desimone, Iii

Marc A Plante

T G Sambandam

James H Johnson

Edward M Desimone

T G Sambandan

James A Johnson

Tg Sambandam

Barry J Haad

Marc A Plant

Edward M De Simone, Iii

Edward M Iii Desimone

A method of crystallizing docetaxel is disclosed. The method comprises (a) combining docetaxel and at least one solubilizing solvent to obtain a solution, wherein the solubilizing solvent is selected from the group consisting of acetone, methyl-tert-butyl ether, tetrahydrofuran (THF), and acetonitrile and (b) adding an anti-solvent to the solution to obtain a crystalline docetaxel, wherein the anti-solvent is water.

Purification of taxanes

Disclosed is a method of crystallizing docetaxel comprising combining docetaxel and at least one solubilizing solvent to obtain a solution, wherein the solubilizing solvent is methylene chloride and adding an anti-solvent to the solution to obtain a crystalline docetaxel, wherein the anti-solvent is water.

Disclosed is a method of crystallizing a taxane comprising combining the taxane and methylene chloride to obtain a solution and adding an anti-solvent to the solution to obtain a crystalline taxane, wherein the anti-solvent is selected from the group consisting of hexane and heptane.

This invention is directed to a method for isolating and/or purifying one or more taxanes from materials comprising taxanes. In one embodiment, the method comprises the steps of: (a) treating a taxane containing material with an amino containing material attached to a solid matrix, such as a polyethyleneimine-bonded silica chromatographic resin; (b) eluting the desired taxane compound from the resin; and (c) recovering the eluted taxane compound.

Purification of taxanes and taxane mixtures using polyethyleneimine-bonded resins

The invention provides methods and compositions for reductively deoxygenating an amide group at a C-3' position of a taxane molecule followed by subsequent intra-molecular acyl migration of an acyl group to the C-3&#x2032; position.

Conversion of taxane molecules

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Gloucester, MA, United States of America

Roland R Franke