Chiral N-heterocyclic carbenes as asymmetric acylation catalysts
作者： Yumiko Suzuki , Kazuyuki Muramatsu , Kaori Yamauchi , Yasuko Morie , Masayuki Sato
DOI: 10.1016/J.TET.2005.09.071
关键词:
摘要: Abstract Chiral N-heterocyclic carbenes are generated from C2-symmetric 1,3-bis(1-arylethyl)imidazolium salts and potassium tert-butoxide. These imidazolidenyl catalyze enantioselective acylation of racemic secondary alcohols. The asymmetric 1-(1-naphthyl)ethanol was achieved in up to 68% ee the acylated product, using (R,R)-1,3-bis[(1-naphthyl)ethyl]imidazolium tetrafluoroborate as a precursor chiral carbene vinyl propionate acyl donor.
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