期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 137, 期 18, 页码 5895-5898出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b03083
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资金
- Hong Kong RGC [GRF-604513, GRF-603313, M-HKUST607/12, ECS-605812]
The first catalytic asymmetric desymmetrization Of azetidines is disclosed. Despite the low propensity of azetidine twig opening and challenging stereocontrol, smooth intermolecular reactions were realized with excellent efficiency and enantioselectivity. These were enabled by the suitable combination of catalyst, nucleophile, protective,group, and reaction, conditions. The highly enantioenriched densely functionalized products are versatile precursors to Other useful chiral molecules. Mechanistic studies, including DFT calculations, revealed that only one catalyst molecule is involved in the key transition state, though both reactants can be activated. Also, the Curtin-Hammett principle dictates the reaction proceeds via amide nitrogen activation.
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