MUMBAI, India, July 5 -- Intellectual Property India has published a patent application (202517059278 A) filed by Mitsubishi Gas Chemical Next Company, Inc., Tokyo, on June 20, for 'method for producing 2-amino-5-substituted-1,3,4-oxadiazole.'
Inventor(s) include Kuroda Toshihiro; and Kamimura Sadao.
The application for the patent was published on July 4, under issue no. 27/2025.
According to the abstract released by the Intellectual Property India: "Provided is an invention relating to a method for producing 2-amino-5-substituted-1,3,4-oxadiazole, which comprises the following steps (A) to (E). (A) A step for preparing a chlorocyanogen solution from hydrogen cyanide and chlorine. (B) A step for adjusting the amount of the hydrochloride byproduct that is secondarily produced together with chlorocyanogen in the step (A) to 0.5 equivalent or less relative to the primarily produced chlorocyanogen. (C) A step for reacting a carboxylic acid hydrazide with the chlorocyanogen solution to produce 2-amino-5-substituted-1,3,4-oxadiazole hydrochloride. (D) A step for adding a base in an amount that is greater than or equal to an equivalent obtained by combining the amount of chlorocyanogen and the amount of the byproduced hydrochloride in the chlorocyanogen solution used in the step (C) to a solution obtained in the step (C). (E) A step for cooling a solution obtained in the step (D) and containing a hydrochloride salt of the base to separate precipitated crystals."
The patent application was internationally filed on July 05, 2023, under International application No.PCT/JP2023/025008.
Disclaimer: Curated by HT Syndication.
