Výsledky vyhledávání - "Wan-Chen Cindy Lee"

Radical differentiation of two ester groups in unsymmetrical diazomalonates for highly asymmetric olefin cyclopropanation

Autor: Jingyi Wang, Jingjing Xie, Wan-Chen Cindy Lee, Duo-Sheng Wang, X. Peter Zhang

Publikováno v: Chem Catal

Diazomalonates have been demonstrated as effective metalloradicophiles for asymmetric radical olefin cyclopropanation via Co(II)-metalloradical catalysis (MRC). Supported by D(2)-symmetric chiral amidoporphyrin ligand, Co(II)-based metalloradical sys

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5985089dfa43fd0a73c4e8273c29ea95
https://pubmed.ncbi.nlm.nih.gov/35494099

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Metalloradical Activation of In Situ-Generated α-Alkynyldiazomethanes for Asymmetric Radical Cyclopropanation of Alkenes

Autor: Jing Ke, Wan-Chen Cindy Lee, Xiaoxu Wang, Yong Wang, Xin Wen, X. Peter Zhang

Publikováno v: J Am Chem Soc

α-Alkynyldiazomethanes, generated in situ from the corresponding sulfonyl hydrazones in the presence of a base, can serve as effective metalloradicophiles in Co(II)-based metalloradical catalysis (MRC) for asymmetric cyclopropanation of alkenes. Wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::457dbc7c81f6f1c3da7ddc90cac67cb0
https://doi.org/10.1021/jacs.1c13154

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Metalloradical catalysis: A radically different approach for molecular construction

Autor: Wan-Chen Cindy Lee

Publikováno v: Chem. 7:1402-1404

Download : Download high-res image (333KB) Download : Download full-size image Cindy is currently a graduate student in the Department of Chemistry at Boston College. Under the supervision of Professor Peter Zhang, Cindy’s PhD research involves the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::82890eecb8f1bfe380ca22d9bbf1e97e
https://doi.org/10.1016/j.chempr.2021.04.004

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Asymmetric Radical Cyclopropanation of Dehydroaminocarboxylates: Stereoselective Synthesis of Cyclopropyl α-Amino Acids

Autor: Congzhe Zhang, Duo-Sheng Wang, Jingjing Xie, X. Peter Zhang, Bo Li, Wan-Chen Cindy Lee

Publikováno v: Chem

Summary A catalytic radical process has been developed for asymmetric cyclopropanation of dehydroaminocarboxylates with in situ-generated α-aryldiazomethanes via Co(II)-based metalloradical catalysis (MRC). Through fine-tuning the environments of D2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa2eebad857188535a99f6dab49460c2
https://pubmed.ncbi.nlm.nih.gov/34693072

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New Catalytic Radical Process Involving 1,4-Hydrogen Atom Abstraction: Asymmetric Construction of Cyclobutanones

Autor: Pan Xu, Wan-Chen Cindy Lee, Jingjing Xie, Jingyi Wang, X. Peter Zhang, Yiling Zhu

Publikováno v: J Am Chem Soc

While alkyl radicals have been well demonstrated to undergo both 1,5- and 1,6-hydrogen atom abstraction (HAA) reactions, 1,4-HAA is typically a challenging process both entropically and enthalpically. Consequently, chemical transformations based on 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a787dc30b1090092280abe79100510d0
https://europepmc.org/articles/PMC8399868/

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Controlling Enantioselectivity and Diastereoselectivity in Radical Cascade Cyclization for Construction of Bicyclic Structures

Autor: Alexander M McKillop, Wan-Chen Cindy Lee, X. Peter Zhang, Duo-Sheng Wang, Congzhe Zhang

Publikováno v: J Am Chem Soc

Radical cascade cyclization reactions are highly attractive synthetic tools for the construction of polycyclic molecules in organic synthesis. While it has been successfully implemented in diastereoselective synthesis of natural products and other co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8762e192d045631339c394c482885baf
https://pubmed.ncbi.nlm.nih.gov/34260202

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Copper(II)-Mediated ortho-Selective C(sp2)–H Tandem Alkynylation/Annulation and ortho-Hydroxylation of Anilides with 2-Aminophenyl-1H-pyrazole as a Directing Group

Autor: Wei Wang, Jie Jack Li, Wan-Chen Cindy Lee

Publikováno v: The Journal of Organic Chemistry. 83:2382-2388

2-Aminophenyl-1H-pyrazole has been identified as a viable directing group to promote copper(II)-mediated ortho-selective sp2 C–H bond tandem alkynylation/annulation of anilides with terminal alkynes to offer arylmethylene isoindolinones. Meanwhile,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b0e9dd9f8ce995bb77ff1f196ac1021e
https://doi.org/10.1021/acs.joc.7b02893

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