Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker
作者:Bingbing Lai、Fuming Mei、Yanlong Gu
DOI:10.1002/asia.201800567
日期:2018.9.4
bifunctional silica‐based solid catalyst that possessed an ionicliquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis‐acid‐catalyzed ring‐opening reaction with a thiol‐functionalized silica. The surfactant‐combined silica‐supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable
Homogeneous and noncovalent immobilization of NHC-Cu catalyzed azide-alkyne cycloaddition reaction
作者:Xiangjie Zhang、Bingyang Wang、Yanmei Lu、Chungu Xia、Jianhua Liu
DOI:10.1016/j.mcat.2021.111452
日期:2021.3
reaction. Both were active in the two-component click cycloaddition reaction of terminalalkynes and organic azides and three-component cycloaddition reaction that employs various terminalalkynes, NaN3 and organic halides with the advantage of excellent yields, low catalyst dosage, short reaction time. The MWNTs@NHC-Cu catalyst could be separated from the reaction system at the end of the reaction and
Silica-supported metal acetylacetonate catalysts with a robust and flexible linker constructed by using 2-butoxy-3,4-dihydropyrans as dual anchoring reagents and ligand donors
2-Butoxy-3,4-dihydropyrans were used, for the first time, as dual anchoring reagents and ligand donors to prepare the immobilize homogeneous metal acetylacetonate catalysts.
2-丁氧基-3,4-二氢吡喃首次被用作双锚定试剂和配体供体,制备固定化均相金属乙酰丙酮酸酯催化剂。
From Waste Biomass to Solid Support: Lignosulfonate as a Cost-Effective and Renewable Supporting Material for Catalysis
作者:Shaohuan Sun、Rongxian Bai、Yanlong Gu
DOI:10.1002/chem.201303364
日期:2014.1.7
2) lignin‐SO3Cu(OTf), and 3) lignin‐IL@NH2 (IL=ionic liquid). These solidmaterials were then examined in many organic transformations. It was finally found that, compared with its homogeneous counterpart as well as some other solid catalysts that are prepared by using different supports with the same metal or catalytically active species, the lignin‐supported catalysts showed better performance in these reactions
Self-Assembled Polymeric Pyridine Copper Catalysts for Huisgen Cycloaddition with Alkynes and Acetylene Gas: Application in Synthesis of Tazobactam
作者:Hao Hu、Aya Ohno、Takuma Sato、Toshiaki Mase、Yasuhiro Uozumi、Yoichi M. A. Yamada
DOI:10.1021/acs.oprd.8b00429
日期:2019.4.19
Novel convoluted polymeric pyridine copper(I) catalysts PVPy-Cu were developed for the Huisgen cyclization of organic azides using alkynes and acetylene gas. They were readily prepared based on our molecular convolution of CuSO4·5H2O and poly(4-vinylpyridine) (PVPy) in the presence of sodium ascorbate with and without various sodium salts in water. Their structural investigation was conducted using