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- W4251199496 abstract "Abstract The asymmetric synthesis of alkynyl and monofluoroalkenyl isoindolinones from N‐methoxy benzamides and α,α‐difluoromethylene alkynes is enabled by C−H activation with a chiral CpRh III catalyst. Remarkably, product formation is solvent‐dependent; alkynyl isoindolinones are afforded in MeOH (up to 86 % yield, 99.6 % ee ) whereas monofluoroalkenyl isoindolinones are generated in i PrCN (up to 98:2 Z / E , 93 % yield, 86 % ee ). Mechanistic studies revealed chiral allene and E ‐configured alkenyl rhodium species as reaction intermediates. The latter is transformed into the corresponding Z ‐configured monofluoroalkene upon protonation in the i PrCN system and into an alkyne by an unusual anti β‐F elimination in the MeOH system. Notably, kinetic resolution processes occur in this reaction. Despite the moderate enantiocontrol for the formation of the chiral allene, the Z ‐monofluoroalkenyl isoindolinones and alkynyl isoindolinones were obtained in good enantiopurities by one or two sequential kinetic resolution processes." @default.
- W4251199496 created "2022-05-12" @default.
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- W4251199496 date "2018-03-01" @default.
- W4251199496 modified "2023-10-14" @default.
- W4251199496 title "Solvent-Dependent Asymmetric Synthesis of Alkynyl and Monofluoroalkenyl Isoindolinones by CpRh<sup>III</sup> -Catalyzed C−H Activation" @default.
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- W4251199496 doi "https://doi.org/10.1002/ange.201712691" @default.
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