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Triphenylphosphine-Mediated Reductive Cyclization of 2-Nitrobiphenyls: A Practical and Convenient Synthesis of Carbazoles (IV).

✍ Scribed by Adam W. Freeman; Marie Urvoy; Megan E. Criswell

Book ID
101981378
Publisher
John Wiley and Sons
Year
2005
Weight
20 KB
Volume
36
Category
Article
ISSN
0931-7597

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## Abstract The synthesis of new methylated thieno[2,3‐a] and [3,2‐b]carbazoles (5) (R=H) was achieved by a palladium‐catalyzed cross‐coupling, intramolecular reductive cyclization sequence of reactions. The cyclization precursors 6‐(2′‐nitrophenyl)benzo[b]thiophenes **(3)** were obtained by Suzuki