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A Biomimetic Synthesis of the Indolo[3,2-j]phenanthridine Alkaloid, Calothrixin B.

✍ Scribed by Akira Yamabuki; Hikohito Fujinawa; Tominari Choshi; Shigeo Tohyama; Kohji Matsumoto; Kana Ohmura; Junko Nobuhiro; Satoshi Hibino


Publisher
John Wiley and Sons
Year
2006
Weight
9 KB
Volume
37
Category
Article
ISSN
0931-7597

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## Abstract Treatment of 2‐hydroxy‐, 2‐mercapto‐, and 2‐ethoxycarbonylamino‐benzonitriles **12** with 2‐fluoro‐ or 2‐nitrophenacylbromides **13** under alkaline conditions provided the corresponding benzofuran, benzothiophene, and indole intermediates **10**, respectivelly. Nucleophilic cyclization