Citation:
JIN Ying, ZHANG Tianyi, CHANG Sheng. Cinchona Alkaloid-9-O-trimethylsilyl Derivatives as Organocatalysts for the Asymmetric “Interrupted” Feist-Bénary Reaction[J]. Chinese Journal of Applied Chemistry,
;2012, 29(9): 1006-1010.
doi:
10.3724/SP.J.1095.2012.00417
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Cinchona alkaloid-9-O-trimethylsilyl(TMS) derivatives have been used to catalyze the asymmetric "interrupted" Feist-Bénary reaction of ethyl bromopyruvate/substituted bromo-ketoesters with 1,3-cyclohexadione.The corresponding hydroxydihydrofurans have been obtained in excellent yields(85%~97%) and with up to 90% ee value.
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