Crystal of cyclic phosphonic acid sodium salt and method for manufacturing same

Inventors: Hiroaki Yuasa (Tokushima, JP); Hiroki Okazaki (Tokushima, JP)

Assignee: OTSUKA CHEMICAL CO., LTD.

C07F9/657163 A61P19/00 A61P29/00 A61P35/00 C07F9/65742 C07F9/657181 A61K31/665 C07B2200/13

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Quick Facts

Patent No.: US 11,168,101
App. No.: 16/877,915
Granted: Nov 9, 2021
Kind: B2

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Abstract

An object t of the present invention is to provide crystal of a cyclic phosphonic acid sodium salt (2ccPA) with high purity and excellent storage stability and a method for producing the crystal. The present invention provides a crystal of a cyclic phosphonic acid sodium salt (2ccPA) represented by formula (1):

Claims (4)

1. A method for producing a compound represented by formula (8):

wherein R 1 represents alkyl, arylalkyl, or aryl, the method comprising

step (F) of allowing a base to act on a compound represented by formula (7):

wherein two R 1 groups are the same or different and represent alkyl, arylalkyl, or aryl.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 11, 2023

From: OTSUKA CHEMICAL CO., LTD.

To: OTSUKA CHEMICAL CO., LTD.; SANSHO CO., LTD.

Reel/Frame 063289/0880 →

Priority Claims (1)

JP 2014-164423 · Aug 12, 2014 · national

Continuity (4)

Division 16460332 · Jul 2, 2019

Division 15872321 · Jan 16, 2018

Division 15501525

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