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Synlett 2011(7): 1015-1017
DOI: 10.1055/s-0030-1259930
DOI: 10.1055/s-0030-1259930
LETTER
© Georg Thieme Verlag
Stuttgart ˙ New York
Indium-Catalyzed Synthesis of Furans and Pyrroles via Cyclization of α-Propargyl-β-keto Esters
Weitere Informationen
Received
2 December 2010
Publikationsdatum:
29. März 2011 (online)
Publikationsverlauf
Publikationsdatum:
29. März 2011 (online)
Abstract
In(OTf)3 or In(NTf2)3 effectively catalyze the cycloisomerization reaction of α-propargyl-β-keto esters and their imine analogues to afford trisubstituted furans and pyrroles, respectively. Both terminal and internal alkynes take part in the reaction with good functional-group compatibility in the presence of only a small amount of the catalyst.
Key words
indium catalyst - keto ester - cyclization - furan - pyrrole
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