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Efficient construction of indole rings from 2-ethynylaniline derivatives catalyzed by copper(II) salts and its application to the tandem cyclization reactions

✍ Scribed by Kou Hiroya; Shin Itoh; Mika Ozawa; Yuichi Kanamori; Takao Sakamoto

Publisher: Elsevier Science
Year: 2002
Tongue: French
Weight: 70 KB
Volume: 43
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)02396-6

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✦ Synopsis

The efficient cyclization reactions of the N-methanesulfonyl or N-ethoxycarbonyl derivatives of 2-ethynylanilines, functionalized on the benzene ring and/or the acetylene terminal into indoles catalyzed by either Cu(OTf) 2 or Cu(OAc) 2 are accomplished. The application of this reaction to the tandem cyclization reaction is also described.

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