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ChemicalBook CAS DataBase List 5-BROMO-1,3-DIHYDRO-BENZO(C)THIOPHENE 2,2-DIOXIDE
351005-12-4

5-BROMO-1,3-DIHYDRO-BENZO(C)THIOPHENE 2,2-DIOXIDE synthesis

2synthesis methods
-

Yield:351005-12-4 97.93%

Reaction Conditions:

with 3-chloro-benzenecarboperoxoic acid in dichloromethane at -25 - 20; for 4 h;

Steps:

6.2 Step 2: Synthesis of Compound 6-2

To a solution of compound 6-1 (1.2 g) in DCM (60 mL) at -25 °C, 3-chloroperoxybenzoic acid (3.85 g) was added, and then the temperature was slowly raised to 20 °C for reaction for 4 hs. The reaction solution was washed with 10% sodium hydroxide (1*40ml), washed with water (1*30ml), washed with saturated brine (1*30ml), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to directly obtain a white solid product 6-2 (1.35 g, 97.93% yield).

References:

WO2022/95989,2022,A1 Location in patent:Page/Page column 20