US 12,258,363 B2
Crystalline form of L-glufosinate ammonium salt and process for production thereof
Prashant Vasant Kini, Mumbai (IN); Chandrasekhar Dayal Mudaliar, Mumbai (IN); Ashishkumar Ravindra Mishra, Mumbai (IN); and Santosh Ganpat Shelke, Mumbai (IN)
Assigned to UPL LTD, Mumbai (IN)
Appl. No. 17/635,491
Filed by UPL LTD, Mumbai (IN)
PCT Filed Jul. 30, 2021, PCT No. PCT/IB2021/056951
§ 371(c)(1), (2) Date Feb. 15, 2022,
PCT Pub. No. WO2022/024052, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 202021033002 (IN), filed on Jul. 31, 2020.
Prior Publication US 2023/0144309 A1, May 11, 2023
Int. Cl. C07F 9/30 (2006.01); A01N 25/12 (2006.01); A01N 57/20 (2006.01); A01P 13/00 (2006.01)
CPC C07F 9/301 (2013.01) [A01N 25/12 (2013.01); A01N 57/20 (2013.01); A01P 13/00 (2021.08); C07B 2200/13 (2013.01)] 9 Claims
 
1. A process for producing a compound of Formula (I)

OG Complex Work Unit Chemistry
said process comprising:
a) suspending an acid addition salt compound of Formula (II), wherein A− is an anion, in an alcohol solvent to form a suspension;

OG Complex Work Unit Chemistry
b) contacting the suspension with gaseous ammonia until complete dissolution of the compound of Formula (II) to form a solution; and
c) subjecting the solution to conditions to precipitate the compound of Formula (I).