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Creators/Authors contains: "Li, Bijin"

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  1. ; ; ; ; ; ; (, Chemical Science)
    This work unlocks an opportunity to rapidly construct fused heterocyclic cations for efficient screening of single-molecular white-light-emitting materials and pure red-light-emitting materials. 
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  2. ; ; (, Chem)
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  3. ; ; ; ; ; ; (, ACS Catalysis)
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  4. ; ; ; ; ; ; ; ; ; ; et al (, Chemical Science)
    The transient directing group (TDG) strategy allowed long awaited access to the direct β-C(sp 3 )–H functionalization of unmasked aliphatic aldehydes via palladium catalysis. However, the current techniques are restricted to terminal methyl functionalization, limiting their structural scopes and applicability. Herein, we report the development of a direct Pd-catalyzed methylene β-C–H arylation of linear unmasked aldehydes by using 3-amino-3-methylbutanoic acid as a TDG and 2-pyridone as an external ligand. Density functional theory calculations provided insights into the reaction mechanism and shed light on the roles of the external and transient directing ligands in the catalytic transformation. 
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  5. ; ; (, Chem)
    null (Ed.)
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  6. ; ; ; ; ; ; ; (, Angewandte Chemie International Edition)
    Abstract Directed C−H functionalization has been realized as a complimentary technique to achieve borylation at a distal position of aliphatic amines. Here, we demonstrated the oxidative borylation at the distal δ‐position of aliphatic amines using various borylating agents, a palladium catalyst, and a rightly tuned ligand in the presence of a cheap oxidant. Moreover, an organopalladium δ‐C(sp3)‐H‐activated intermediate has been isolated and crystallographically characterized to get mechanistic insight. 
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  7. ; ; ; (, Angewandte Chemie International Edition)
    Abstract The first example of PdII‐catalyzed γ‐C(sp3)−H functionalization of aliphatic and benzoheteroaryl aldehydes has been developed using a transient ligand and an external ligand, concurrently. A wide array of γ‐arylated aldehydes were readily accessed without preinstalling internal directing groups. The catalytic mechanism was studied by performing deuterium‐labelling experiments, which indicated that the γ‐C(sp3)−H bond cleavage is the rate‐limiting step during the reaction process. This reaction could be performed on a gram scale, and also demonstrated its potential application in the synthesis of new mechanofluorochromic materials with blue‐shifted mechanochromic properties. 
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