Reduction of indigo: Simple syntheses of 3-acetoxy-, 1-acetyl-2.3-dihydro-, 3-acetoxy-3′-acetyl-, 3-acetoxy-1,3′-diacetyl-2,2′-bisindoles, and 2,2′-bisindole
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概要
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Indigo was converted to 2,2′-bisindole by the direct reduction with zinc in acetic acid and acetic anhydride under argon or hydrogen atmosphere. Reduction with tin and iron afforded 3-acetoxy-2,2′-bisindole predominantly. Useful building blocks such as 1-acetyl-2,3-dihydro-, 3-acetoxy-3′-acetyl-, and 3-acetoxy-1,3′-diacetyl-2,2′-bisindoles were also produced depending on metal and reaction conditions.
- 日本複素環化学研究所の論文
- 1997-00-00
日本複素環化学研究所 | 論文
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