TfOH-catalyzed intramolecular alkyne–ketone metathesis leading to highly substituted five-membered cyclic enones

Tienan Jin; Fan Yang; Chunli Liu; Yoshinori Yamamoto

doi:10.1039/B905954G

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Chemical Communications

Issue 24, 2009

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TfOH-catalyzed intramolecular alkyne–ketone metathesis leading to highly substituted five-membered cyclic enones

Tienan Jin , Fan Yang , Chunli Liu and Yoshinori Yamamoto

Chem. Commun., 2009, 3533-3535

DOI: 10.1039/B905954G
Received 25 Mar 2009, Accepted 07 May 2009
First published on the web 21 May 2009
This article is part of the collection: Selective Catalysis for Organic Synthesis

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Abstract
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The intramolecular carbocyclization of tethered alkynyl ketones to five-membered cyclic enones is shown to be catalyzed by trifluoromethanesulfonic acid in MeOH, proceeding in good to excellent yields and with high selectivities.

Abstract from Catalysts & Catalysed Reactions 2009

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Abstract from Methods in Organic Synthesis 2009

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Chemical Communications

TfOH-catalyzed intramolecular alkyne–ketone metathesis leading to highly substituted five-membered cyclic enones

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