Preparation of Clopidogrel and Its Analogues Methyl Tetrahydrothienopyridine Acetate Compuunds
申请人:Wang Lixin
公开号:US20080249311A1
公开(公告)日:2008-10-09
The present invention disclosed a preparation method of Clopidogrel (X=2-Cl) and its analogues of methyl tetrahydrothienopyridine acetate (I) by using halogen phenyl acetonitrile (VIII) as starting material and tetrahydrothienopyridine acetonitrile (IV), tetrahydrothienopyridine acetate (V) as key intermediates, and further using kinetic resolution to prepare the optical active Clopidogrel and compounds of methyl tetrahydrothenopridine acetate of formula (XII). The Clopidogrel of present invention is a novel high effective and safety drug for inhibition of platelet aggregation. This invention applied systematic technique of racemization of unwanted optical active enantiomer, recover recycle and reuse of resolution agent etc., with greater economic advantages and suitable for commercial scale industrial production.
Wherein: X represents atoms of hydrogen, fluorine, chlorine, bromine or iodine, M represents an alkali metal ion.
METHOD FOR PREPARING CLOPIDOGREL 1,5-NAPHTHALENEDISULFONATE OR HYDRATE THEREOF
申请人:Suh Kwee Hyun
公开号:US20090036683A1
公开(公告)日:2009-02-05
The present invention relates to a method for preparing clopidogrel 1,5-naphthalenedisulfonate or a hydrate thereof, which comprises reacting a clopidogrel-acid addition salt with disodium 1,5-naphthalenedisulfonate or its hydrate in water, or a mixture of water and an organic solvent. High quality clopidogrel 1,5-naphthalenedisulfonate can be prepared by the inventive method by way of using non-corrosive disodium 1,5-naphthalenedisulfonate.
MANUFACTURING METHOD AND APPARATUS OF ULTRAFINE PARTICLES HAVING UNIFORM PARTICLE SIZE DISTRIBUTION
申请人:Hwang Sung Joo
公开号:US20110200678A1
公开(公告)日:2011-08-18
The present invention relates to a novel technology for forming fine particles with a size of 0.02˜3 microns from a solid that can be dissolved in a liquid solvent and is not decomposed by heat. The particle preparation technology according to the present invention may be applicable to the fields of food, cosmetics, biopolymer, polymer compositions, and pharmaceuticals.
The present invention generally relates to a pharmaceutical dosage form and controlled release of biologically active agents, diagnostic agents, reagents, cosmetic agents, and agricultural/insecticide agents. In one embodiment, the dosage form has a substrate that forms a compartment, wherein the substrate includes at least a first piece and a second piece, wherein the first piece operably links to the second piece. The dosage form contains a drug content that is loaded into the compartment. The dosage form also has a releaser operably linked to the substrate which upon contact with water or body fluid is capable of separating the first and second piece to open the compartment and release the drug content.