Abstract: A crystalline polymorph of 7-ethyl-10-hydroxycamptothecin exhibiting an X-ray diffraction pattern having peaks at 10.9±0.2, 13.2±0.2, 23.9±0.2, and 26.1±0.2 2-theta degree.
Abstract: A process of making an aromatase inhibitor of formula (I) wherein each of R1, R2, R3, and R4, independently, is hydrogen, halogen, or C1-C6 alkyl, comprising reacting a compound of formula (II) with an acid in the presence of a suitable solvent. A new crystalline form of exemestane and is also disclosed.
Abstract: The present invention provides for novel crystalline forms of irinotecan hydrochloride and processes for their preparation, pharmaceutical compositions containing the novel forms and methods for treating metastatic carcinoma of the colon or rectum using same.
Abstract: The key intermediate in any synthesis of Irinotecan is 7-ethyl-10-hydroxy-20(S)-camptothecin. A process for the efficient synthesis of this intermediate is demonstrated proceeding through readily available 20(S)-camptothecin. Various other tecan compounds may be made by use of corresponding 7-alkyl-10-hydroxy-20(S)-camptothecin intermediates.
Abstract: The key intermediate in any synthesis of Irinotecan is 7-ethyl-10-hydroxy-20(S)-camptothecin. A process for the efficient synthesis of this intermediate is demonstrated proceeding through readily available 20(S)-camptothecin. Various other tecan compounds may be made by use of corresponding 7-alkyl-10-hydroxy-20(S)-camptothecin intermediates.
Abstract: The present invention relates to an improved synthesis of imidazo[1,2-a]pyridine-3-N,N-dialkylacetamides, including zolpidem tartrate.
Abstract: The present invention provides a method of converting an intermediate compound to the desired S,S diastereomer for efficiently making benazepril and analogues thereof.
Abstract: The present invention provides an efficient synthetic process for making benazepril and analogues thereof by having an intermediate compound undergo epimerization and kinetic resolution.
Abstract: The present invention provides a novel semi-synthetic method of producing a variety of novel taxane derivatives. The method involves the reaction of a phenylisoserine derivative with a suitably blocked Baccatin III derivative to produce a taxane substrate that may be further modified to form Pactitaxel and other potentially useful taxane derivatives.
Type:
Grant
Filed:
March 23, 2001
Date of Patent:
March 11, 2003
Assignee:
Scinopharm Taiwan, Ltd.
Inventors:
George Schloemer, Yung-Fa Chen, Chien Hsin Lin, Wlodzimierz Daniewski
Abstract: The present invention provides a method of converting an intermediate compound to the desired S,S diastereomer for efficiently making benazepril and analogues thereof.
Abstract: The present invention provides a novel semi-synthetic method of producing a variety of novel taxane derivatives. The method involves the reaction of a phenylisoserine derivative with a suitably blocked Baccatin III derivative to produce a taxane substrate that may be further modified to form Pactitaxel and other potentially useful taxane derivatives.
Type:
Application
Filed:
March 23, 2001
Publication date:
September 26, 2002
Applicant:
ScinoPharm Taiwan, Ltd.
Inventors:
George Schloemer, Yung-Fa Chen, Chien Hsin Lin, Wlodzimierz Daniewski