Journal
HETEROCYCLES
Volume 101, Issue 2, Pages 580-592Publisher
Japan Inst Heterocyclic Chemistry
DOI: 10.3987/COM-19-S(F)48
Keywords
Hydrogen-Bonding Catalysis; Tetraalkylammonium Salt; Trialkylsulfonium Salt; DFT Calculation
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Funding
- JSPS KAKENHI [JP18H04660, JP17KT0011, JP16K05780]
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Hydrogen-bonding catalysis by cyclic trialkylsulfonium and tetraalkylammonium salts Among the examined in an onium aza-Diels-Alder reaction salt catalysts, cyclic tetrakis[3,5-bis(trifluoromethyl)phenyl]borate possessing a was investigated. trialkylsulfonium non-coordinating counter anion was the most effective. Details of the activation modes of cyclic trialkylsulfonium and tetraalkylammonium salts were discussed on the basis of DFT calculation.
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