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  1. Article ; Online: Palladium Catalyzed Allylic C-H Oxidation Enabled by Bicyclic Sulfoxide Ligands

    Yuming Wen / Jianfeng Zheng / Alex H. Evans / Qiang Zhang

    Organics, Vol 4, Iss 23, Pp 289-

    2023  Volume 296

    Abstract: The activation of C-H bonds is a potent tool for modifying molecular structures in chemistry. This article details the steps involved in a novel ligand bearing a bicyclic [3.3.1]-nonane framework and bissulfoxide moiety. A palladium catalyzed allylic C-H ...

    Abstract The activation of C-H bonds is a potent tool for modifying molecular structures in chemistry. This article details the steps involved in a novel ligand bearing a bicyclic [3.3.1]-nonane framework and bissulfoxide moiety. A palladium catalyzed allylic C-H oxidation method enables a direct benzyl-allylic functionalization with the bissulfoxide ligand. Bissulfoixde ligand possesses a rapidly constructed bicyclic [3.3.1] framework and it proved to be effective for enabling both N- and C-alkylation. A total of 13 C-H activation productions were reported with good to excellent yields. This report validated that it is necessary to include bissulfoxide as a ligand for superior reactivities. Naftifine was produced utilizing developed C-H functionalization methodology in good overall yields.
    Keywords C-H activation ; bicyclic ligand ; sulfoxide ; palladium ; amino acids ; Organic chemistry ; QD241-441
    Language English
    Publishing date 2023-06-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Van Krevelen diagrams based on machine learning visualize feedstock-product relationships in thermal conversion processes

    Shule Wang / Yiying Wang / Ziyi Shi / Kang Sun / Yuming Wen / Lukasz Niedzwiecki / Ruming Pan / Yongdong Xu / Ilman Nuran Zaini / Katarzyna Jagodzińska / Christian Aragon-Briceno / Chuchu Tang / Thossaporn Onsree / Nakorn Tippayawong / Halina Pawlak-Kruczek / Pär Göran Jönsson / Weihong Yang / Jianchun Jiang / Sibudjing Kawi /
    Chi-Hwa Wang

    Communications Chemistry, Vol 6, Iss 1, Pp 1-

    2023  Volume 11

    Abstract: Abstract Feedstock properties play a crucial role in thermal conversion processes, where understanding the influence of these properties on treatment performance is essential for optimizing both feedstock selection and the overall process. In this study, ...

    Abstract Abstract Feedstock properties play a crucial role in thermal conversion processes, where understanding the influence of these properties on treatment performance is essential for optimizing both feedstock selection and the overall process. In this study, a series of van Krevelen diagrams were generated to illustrate the impact of H/C and O/C ratios of feedstock on the products obtained from six commonly used thermal conversion techniques: torrefaction, hydrothermal carbonization, hydrothermal liquefaction, hydrothermal gasification, pyrolysis, and gasification. Machine learning methods were employed, utilizing data, methods, and results from corresponding studies in this field. Furthermore, the reliability of the constructed van Krevelen diagrams was analyzed to assess their dependability. The van Krevelen diagrams developed in this work systematically provide visual representations of the relationships between feedstock and products in thermal conversion processes, thereby aiding in optimizing the selection of feedstock and the choice of thermal conversion technique.
    Keywords Chemistry ; QD1-999
    Subject code 670
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Rational radical neck dissection for oral cancer.

    Longjiang, Li / Yuming, Wen / Changmei, Wang / Lijuan, Wang

    Chinese medical journal

    2003  Volume 116, Issue 8, Page(s) 1123–1126

    MeSH term(s) Humans ; Mouth Neoplasms/surgery ; Neck Dissection/adverse effects ; Neck Dissection/methods
    Language English
    Publishing date 2003-08
    Publishing country China
    Document type Journal Article
    ZDB-ID 127089-8
    ISSN 0366-6999 ; 1002-0187
    ISSN 0366-6999 ; 1002-0187
    Database MEDical Literature Analysis and Retrieval System OnLINE

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