Intermediate of preparing high-purity sulfonamide compound

US10221128B2 · kind B2 · utility

Assignee

• ORIENTAL(LUZHOU) AGROCHEMICALS CO., LTD. · CN

Inventors

• Xiaomin Liang · Hangzhou City, CN
• Hao Jiang · 安丰镇, CN
• Haige Teng · Zhejiang, CN
• Jinzhi Yang · Hangzhou City, CN
• Junjin ZHOU · Hangzhou City, CN
• Jinlong Zhang · 红钢城街道, CN
• Bangchi Chen · Hangzhou City, CN

Key dates

• Filing date: Mar 18, 2018
• Grant date: Mar 5, 2019
• Expiry date: Mar 18, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2527/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention discloses a sulfonamide compound (III) which is intermediately produced in a process for preparing a high-purity sulfonamide compound (I). The preparation comprises the following steps: a, taking a crude product of a sulfonamide compound (I) as an initial raw material, and enabling the raw material to react with a compound of a formula (II) in presence of alkali and a catalyst so as to synthesize an intermediate of a formula (III); and b, enabling the compound represented by the formula (III) to react with alkali or acid, thereby obtaining the high-purity sulfonamide compound (I).