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Merging Photoredox PCET with Ni-Catalyzed Cross-Coupling: Cascade Amidoarylation of Unactivated Olefins  Shuai Zheng, Álvaro Gutiérrez-Bonet, Gary A.

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Presentation on theme: "Merging Photoredox PCET with Ni-Catalyzed Cross-Coupling: Cascade Amidoarylation of Unactivated Olefins  Shuai Zheng, Álvaro Gutiérrez-Bonet, Gary A."— Presentation transcript:

1 Merging Photoredox PCET with Ni-Catalyzed Cross-Coupling: Cascade Amidoarylation of Unactivated Olefins  Shuai Zheng, Álvaro Gutiérrez-Bonet, Gary A. Molander  Chem  Volume 5, Issue 2, Pages (February 2019) DOI: /j.chempr Copyright © 2018 Elsevier Inc. Terms and Conditions

2 Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

3 Figure 1 Biological Relevance, Diversification of “Lidinone” Derivatives, and Naturally Occurring Allylic Alcohols Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

4 Figure 2 Optimization of Reaction Conditions
aReactions were performed on a 0.3-mmol scale. bYield of isolated product after column chromatography. Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

5 Figure 3 Scope of N-Arylated Alkenyl Amides
Reaction conditions: amide S1–S18 (0.36 mmol, 1.2 equiv), 4-bromobenzonitrile (0.3 mmol, 1.0 equiv), Bu4N[OP(O) (OBu)2] (0.75 mmol, 2.5 equiv), Ni(dMeObpy) (H2O)2Br2 (0.018 mmol, 6 mol %), [Ir-1] (0.009 mmol, 3 mol %), blue LED, 6 mL t-BuOH/PhCF3 (2:1). a Reaction run on 5 mmol scale. b [Ir-2] was used. Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

6 Figure 4 Scope of (Hetero)Aryl Halides, Carbamates, and Ureas
Reaction conditions: amide, urea, or carbamate S20–S52 (0.36 mmol, 1.2 equiv), (hetero)aryl halide (0.3 mmol, 1.0 equiv), Bu4N[OP(O) (OBu)2] (0.75 mmol, 2.5 equiv), Ni(dMeObpy) (H2O)2Br2 (0.018 mmol, 6 mol %), [Ir-1] (0.009 mmol, 3 mol %), blue LED, 6 mL t-BuOH/PhCF3 (2:1). a (Hetero)aryl iodide was applied. b 7.5 equiv of base were used. Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

7 Figure 5 Measuring the Hydrogen-Bonding Affinity of Amides and Carbamates See also Figures S12–S15 for further details. Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

8 Scheme 1 Generation of Amidyl Radicals from Functionalized and Non-functionalized Amides Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

9 Scheme 2 Relative Cyclization Rate Studies and Radical Clock Experiment aThe values reported are relative to kT. See Figure S1 for further details. Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions

10 Scheme 3 Proposed Catalytic Cycle and PCET Mechanism
Chem 2019 5, DOI: ( /j.chempr ) Copyright © 2018 Elsevier Inc. Terms and Conditions


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