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Oriental (luzhou) Agrochemicals Co., Ltd.

Xiaomin Liang

Bangchi Chen

Hao Jiang

Jinlong Zhang

Haige Teng

Jinzhi Yang

Junjin Zhou

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).

Intermediate of preparing high-purity sulfonamide compound

The present invention discloses a method for preparing a high-purity sulfonamide compound and an intermediate of the sulfonamide compound. The method 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).

Method for preparing high-purity sulfonamide compound, and intermediate of sulfonamide compound

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Hangzhou, China

Xiaomin Liang