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Ytterbium(III) triflate: An efficient and simple catalyst for isomerization of 2′‐hydroxychalcone and 2′‐aminochalcones in ionic liquid
Author(s) -
Rao V. Kameswara,
Rao M. Sudershan,
Kumar Anil
Publication year - 2011
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.760
Subject(s) - isomerization , chemistry , catalysis , trifluoromethanesulfonate , lewis acids and bases , ionic liquid , ytterbium , organic chemistry , ionic bonding , lewis acid catalysis , ion , doping , physics , optoelectronics
Isomerization of 2′‐hydroxychalcone and 2′‐aminochalcone have been investigated using ytterbium(III) trifluromethanesulfonate {Yb(OTf) 3 } (30 mol %) as Lewis acid catalyst in [bmim][BF 4 ] ionic liquid. The effect of different metal triflates as Lewis acid, catalyst loading and reaction media was studied for this isomerization reaction. Advantages of the methodology include short reaction time, excellent yields, catalytic use of Lewis acid, and recovery and reuse of the catalyst. J. Heterocyclic Chem., (2011).