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- W2608692743 endingPage "2230" @default.
- W2608692743 startingPage "2220" @default.
- W2608692743 abstract "Asymmetric ylide–phosphonium [Ph3PCHC(O)CH2PR3]Br (PR3 = PPh2Me 4, PPhMe2 5) and bis(phosphonium) salts [Ph3PCH2C(O)CH2PR3]X2 (PR3 = PPh2Me 6, PPhMe2 7) react with PdCl2(NCMe)2/NEt3 or Pd(OAc)2, respectively, to give the C,C-chelating bis(ylide) complexes [PdCl2{η2-[Ph3PCHC(O)CHPR3-κ-C,C]}] (PR3 = PPh2Me 8, PPhMe2 9) regioselectively in the erythro form. Starting from 8 and 9, the corresponding halide-bridge dimers [Pd(µ-Cl){η2-[Ph3PCHC(O)CHPR3-κ-C,C]}]2(ClO4)2 (PR3 = PPh2Me 12, PPhMe2 13) can be easily prepared. Complexes 12 and 13 react with bulky phosphines or diphosphines, undergoing intramolecular Caryl–H bond activation and ortho-palladation of the C,C-chelating bis(ylide), thereby transforming the Pd{η2-[Ph3PCHC(O)CHPR3-κ-C,C]} fragment into the Pd(C6H4-2-PPh2CHC(O)CH2PR3-κ-C,C) moiety in complexes 14–21. This ortho-palladation takes place with complete regioselectivity, because only the PPh3 unit undergoes the C–H bond activation process." @default.
- W2608692743 created "2017-05-05" @default.
- W2608692743 creator A5056829532 @default.
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- W2608692743 date "2017-04-18" @default.
- W2608692743 modified "2023-09-30" @default.
- W2608692743 title "Regioselective C–H Bond Activation of Asymmetric Bis(ylide)s Promoted by Pd" @default.
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- W2608692743 doi "https://doi.org/10.1002/ejic.201700030" @default.
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