期刊
CHEMISTRYSELECT
卷 6, 期 30, 页码 7722-7726出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202101170
关键词
Aldol reaction; Isatins; Organocatalysis; Tetrapeptide; Trifluoromethyl ketones
资金
- Ningxia Key RAMP
- D Program (Special Talents) [2018BEB04021]
- Higher Education Scientific Research Project of Ningxia [NGY2018-92]
- Project of Ningxia Medical University [XT2017016]
- Ningxia Key RAMP
- D Program (General project) [2019BEG03065]
An efficient strategy has been developed for the construction of (R)-3-alkyl-3-hydroxyindolin-2-one and (S)-5-trifluoromethyl-4-hydroxy-4-arylpentan-2-one derivatives catalyzed by the beta-turn tetrapeptide catalyst, yielding high product yields with good enantioselectivity.
An efficient strategy shaping the construction of (R)-3-alkyl-3-hydroxyindolin-2-one and (S)-5-trifluoromethyl-4-hydroxy-4-arylpentan-2-one derivatives catalyzed by the beta-turn tetrapeptide catalyst under mild conditions was developed. Various isatins and ketones could participate in this reaction, and the desired adducts were obtained with excellent yield (up to 99 %) and moderate to high enantioselectivity (ee up to 85 %) and excellent diastereoselectivity (dr up to >20 : 1). Moreover, a series of trifluoromethyl ketones with ketones also could participate in this reaction, and the resulting beta-trifluoromethyl-beta-hydroxy ketones with excellent yields and moderate enantioselectivities (ee up to 58 %) were obtained. In addition, the strategy afforded better results than natural papain.
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