Abstract: Chiral amino compounds, methods of preparation and uses thereof. Tamiflu can be obtained from the said compounds. Multi-substituted chiral tetrahydropyrrolyl amine which can be used as intermediate compounds of medicament can also be produced by the said compounds.
Type:
Grant
Filed:
December 17, 2010
Date of Patent:
May 26, 2015
Assignees:
SHANGHAI INSTITUTE OF ORGANIC CHEMISTRY, CHINESE ACADEMY OF SCIENCES, LIANHE CHEMICAL TECHNOLOGY CO., LTD, LIANHE CHEMICAL TECHNOLOGY (TAIZHOU) CO., LTD
Abstract: Chiral amino compounds, methods of preparation and uses thereof. Tamiflu can be obtained from the said compounds. Multi-substituted chiral tetrahydropyrrolyl amine which can be used as intermediate compounds of medicament can also be produced by the said compounds.
Type:
Application
Filed:
December 17, 2010
Publication date:
August 7, 2014
Applicants:
SHANGHAI INSTITUTE OF ORGANIC CHEMISTRY, CHINESE ACADEMY OF SCIENCES, LIANHE CHEMICAL TECHNOLOGY CO., LTD.
Abstract: Provided is a method for preparing 2,5-dimethylphenylacetic acid, wherein p-xylene is mixed with paraformaldehyde and concentrated hydrochloric acid in a solvent of ion liquid to obtain 2,5-dimethyl benzyl chloride by the chloromethylation reaction. Then, 2,5-dimethyl benzyl chloride is introduced into a reactor with an acid binding agent and a solvent, the carbonylation and hydrolysis reaction is conducted in the presence of a catalyst to obtain 2,5-dimethylphenylacetic acid. The present process has new route, less synthesis steps, simple operation, lower cost, increased yield, and is friendly to the environment. Therefore, the method is suitable for industrial production.
Type:
Grant
Filed:
June 7, 2011
Date of Patent:
March 4, 2014
Assignees:
Lianhe Chemical Technology Co., Ltd, Jiangsu Lianhe Chemical Technology Co., Ltd.
Inventors:
Ping Wang, Xiaobin Fan, Xingjun Lin, Zhaohui He
Abstract: A method for preparing the linezolid (compound 1), which comprises the steps of: (1) carrying out the debenzyl reaction of compound 4 in solvent, to obtain the compound 5 or its acetic acid salt; (2) carrying out the acetylation reaction in the amino of the compound 5 or its acetic acid salt obtained in step (1) in solvent to obtain the compound 1. The intermediates to prepare the compound 1 and the acetic acid salt of compound 5. The present preparation method is easy to obtain the chiral materials and the chiral materials are cheap, the process and the post treatment are simple, the intermediate products and the end product are easy to be purified, the total yield is high, their purities are also high, this preparation method is easy to be used in the industry manufacture.
Abstract: Provided is a method for preparing 2,5-dimethylphenylacetic acid, wherein p-xylene is mixed with paraformaldehyde and concentrated hydrochloric acid in a solvent of ion liquid to obtain 2,5-dimethyl benzyl chloride by the chloromethylation reaction. Then, 2,5-dimethyl benzyl chloride is introduced into a reactor with an acid binding agent and a solvent, the carbonylation and hydrolysis reaction is conducted in the presence of a catalyst to obtain 2,5-dimethylphenylacetic acid. The present process has new route, less synthesis steps, simple operation, lower cost, increased yield, and is friendly to the environment. Therefore, the method is suitable for industrial production.
Type:
Application
Filed:
June 7, 2011
Publication date:
February 21, 2013
Applicants:
JIANGSU LIANHE CHEMICAL TECHNOLOGY CO., LTD., LIANHE CHEMICAL TECHNOLOGY CO., LTD
Inventors:
Ping Wang, Xiaobin Fan, Xingjun Lin, Zhaohui He
Abstract: A method for preparing the linezolid (compound 1), which comprises the steps of: (1) carrying out the debenzyl reaction of compound 4 in solvent, to obtain the compound 5 or its acetate; (2) carrying out the acetylation reaction in the amino of the compound 5 or its acetate obtained in step (1) in solvent to obtain the compound 1. The intermediates to prepare the compound 1 and the acetate of compound 5. The present preparation method is easy to obtain the chiral materials and the chiral materials are cheap, the process and the post treatment are simple, the intermediate products and the end product are easy to be purified, the total yield is high, their purities are also high, this preparation method is easy to be used in the industry manufacture.