US Patent 7271272 Process for preparing 4-aminomethyl-3-alkoxyiminopyrrolidine methanesulfonate

Patent 7271272 was granted and assigned to LG on September, 2007 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

72712720

Patent Inventor Names

Kyung Hee Lee0

Yeong-Dae Kim0

Young-Keun Kim0

Gyo-Hyun Hwang0

Hyun Nam0

Hyun-Ik Shin0

Jae Sung Lee0

Jay-Hyok Chang0

Date of Patent

September 18, 2007

Patent Application Number

105483240

Date Filed

March 6, 2004

Patent Primary Examiner

‌

Golam M. M. Shameem

Patent abstract

The present invention relates to a process for the preparation of 4-aminomethyl-3-alkoxyiminopyrrolidine methane-sulfonate, a key intermediate of quinolone antibiotics. According to the process of the present invention, the total number of steps has been shortened to 2-3 steps, the solid separation is not required, and the use of costly chemicals, particularly (BOC)2O (t-butoxycarbonyl anhydride), several organic solvents and reactants, is eliminated.

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