METHOD FOR PRODUCING URACIL COMPOUND CRYSTAL

AR109029B1Active Publication Date: 2026-08-26SUMITOMO CHEM CO LTD
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Patent Information

Application Number
ARP20170101933
Authority / Receiving Office
AR · AR
Patent Type
Patents
Current Assignee / Owner
Priority Date
2017-03-22
Filing Date
2017-07-12
Publication Date
2026-08-26
Estimated Expiration
2037-07-12
Patent Text Reader

Abstract

A method is provided for producing a high-purity uracil compound crystal by means of a process that can be carried out on an industrial scale. Specifically, a method is provided for producing a uracil compound crystal characterized in that the method comprises dissolving a composition comprising a uracil compound represented by formula (1) in organic solvents consisting of an alcohol solvent C 3-6 and an aromatic solvent to obtain a solution and precipitate a crystal of said uracil compound from the solution.
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Claims

1. A method for producing a crystal of a uracil compound represented by formula (1): (FORMULA I) characterized in that the method comprises - (Step A) dissolving a crude composition comprising the uracil compound in organic solvents consisting of a C3-4 alcohol solvent and an aromatic solvent to obtain a solution, wherein the C3-4 alcohol solvent is a solvent selected from the group consisting of 2-propanol and 1-butanol, the aromatic solvent is a solvent selected from the group consisting of o-xylene, m-xylene, p-xylene and ethylbenzene or a mixture of two or more thereof, and a weight ratio of the C3-4 alcohol solvent to the aromatic solvent is from 50:50 to 98:2; and - (Step B) precipitating a crystal of the uracil compound from the solution, wherein the uracil compound crystal is precipitated by cooling the solution of the crude composition obtained in Step A to a temperature within the range of -10 to 50°C. Sole Claim