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Dirhodium‐Catalyzed Enantioselective Synthesis of Difluoromethylated Cyclopropanes via Enyne Cycloisomerization
- Source :
- Advanced Science, Vol 11, Iss 7, Pp n/a-n/a (2024)
- Publication Year :
- 2024
- Publisher :
- Wiley, 2024.
-
Abstract
- Abstract (Difluoromethylated cyclopropane represents an important motif, which is widely found in bioactive and functional molecules. Despite significant progress in modern chemistry, the atom‐economic and enantioselective synthesis of difluoromethylated cyclopropanes is still challenging. Herein, an Rh2(II)‐catalyzed asymmetric enyne cycloisomerization is described to construct chiral difluoromethylated cyclopropane derivatives with up to 99% yield and 99% ee in low catalyst loading (0.2 mol%), which can be easily transformed into highly functionalized difluoromethylated cyclopropanes with vicinal all‐carbon quaternary stereocenters by ozonolysis. Mechanistic studies and the crystal structures of alkyne‐dirhodium complexes reveal that the cooperative weak hydrogen bondings between the substrates and the dirhodium catalyst may play key roles in this reaction.)
Details
- Language :
- English
- ISSN :
- 21983844
- Volume :
- 11
- Issue :
- 7
- Database :
- Directory of Open Access Journals
- Journal :
- Advanced Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6aaa5dae210343cdb0eb8342f5b0296b
- Document Type :
- article
- Full Text :
- https://doi.org/10.1002/advs.202306404