期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 7, 期 17, 页码 3599-3604出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b909641h
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资金
- JSPS - CNRS
- KAKENHI [21390030]
- Ministry of Education, Culture, Sports, Science and Technology Japan [19020024]
Chiral nonracemic guanidines act as Bronsted bases to generate guanidinium enolates for the enantioselective electrophilic trifluoromethylation of beta-keto esters by means of S-(trifluoromethyl)dibenzothiophenium tetrafluoroborate (Umemoto reagent) with good enantioselectivity of 60-70% range. Despite the fact that the ees are still improvable, the model reported in this work could spark the imagination of chemists to design new chiral bases to improve the stereochemical outcome.
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