Acetic Acid → Ethyl 5-amino-1,2-benzisothiazole-3-acetate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A 10% acetic acid solution (31.0 mL) is stirred at 50° C., treated with iron powder (0.656 g), treated dropwise with a solution of ethyl 5-nitro-1,2-benzisothiazole-3-acetate (1.03 g, 3.88 mmol) in ethyl acetate, stirred at 50° C. for two hours, treated with additional iron powder (0.305 g), stirred at 50° C. for 15 minutes, and poured into saturated sodium hydrogen carbonate solution. The resultant aqueous mixture is extracted with ethyl acetate. The combined organic extracts are washed sequentially with water and brine, dried over anhydrous sodium sulfate, and concentrated in vacuo to obtain an oil. Column chromatography of the oil using silica gel and methylene chloride gives the title product as a yellow oil.

Herkunft & Nachweise