Nanjo T, Yamamoto S, Tsukano C, Takemoto Y. Synthesis of 3-acyl-2-arylindole via palladium-catalyzed isocyanide insertion and oxypalladation of alkyne.
Org Lett 2013;
15:3754-7. [PMID:
23822877 DOI:
10.1021/ol4016699]
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Abstract
The synthesis of 3-acyl-2-arylindole derivatives was performed through palladium-catalyzed isocyanide insertion and oxypalladation of an alkyne. As a result of the introduction of internal nucleophiles, domino cyclization was also achieved for the synthesis of several tetracyclic indole derivatives. Imidoylpalladium generated by isocyanide insertion is a key intermediate in these reactions.
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