Novel Brønsted Acidic Ionic Liquids Based on Benzimidazolium Cation: Synthesis and Catalyzed Conjugate Addition of Indoles with α,β-unsaturated Ketones
2011 ◽
Vol 233-235
◽
pp. 977-984
Keyword(s):
Brønsted acidic ionic liquids based on benzimidazolium cation was synthesized and employed as an efficient catalysts for the Michael addition reaction of indoles to α,β-unsaturated ketones under mild conditions to afford the corresponding conjugate addition products in high yields (90%-98%). The catalyst 1-butyl-3-(3-sulfopropyl)benzimidazolium p-toluenesulfonate ([PSbbim][p-CH3PhSO3]) could be reused at least three times without a noticeably decrease in its activity.
2019 ◽
Vol 296
◽
pp. 111874
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1966 ◽
Vol 7
(12)
◽
pp. 1269-1272
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2020 ◽
Vol 63
(19)
◽
pp. 11195-11214
Keyword(s):
2007 ◽
Vol 2007
(10)
◽
pp. 561-562
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Keyword(s):
1985 ◽
Vol 50
(16)
◽
pp. 3019-3022
◽
Keyword(s):