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Unexpected Formation of the Arcyriacyanin System by Condensation of a 3-Bromo-4-(indol-3-yl)maleimide with (2-Nitrophenyl)acetates.

✍ Scribed by Guido Mayer; Claudia Hinze; Kurt Polborn; Wolfgang Steglich


Publisher
John Wiley and Sons
Year
2004
Weight
24 KB
Volume
35
Category
Article
ISSN
0931-7597

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## Abstract Triphenylphosphine (TPP) has been utilized as a novel and efficient catalyst for the Knoevenagel condensation of indole‐3‐carboxaldehydes **1(a–e)**, 1‐methyl‐1H‐indole‐3‐carboxaldehydes **4(a–e)**, and 1‐ethyl‐1H‐indole‐3‐carboxaldehydes **6(a–e)** with the active methylene compound, t