纤维素负载的炔酸和烯炔酰胺的多相金催化环异构化反应
Cellulose-Supported Heterogeneous Gold-Catalyzed Cycloisomerization Reactions of Alkynoic Acids and Allenynamides.
作者信息
Deiana Luca, Badali Elham, Rafi Abdolrahim A, Tai Cheuk-Wai, Bäckvall Jan-E, Córdova Armando
机构信息
Department of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden.
Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden.
出版信息
ACS Catal. 2023 Jul 25;13(15):10418-10424. doi: 10.1021/acscatal.3c02722. eCollection 2023 Aug 4.
Herein, we describe efficient nanogold-catalyzed cycloisomerization reactions of alkynoic acids and allenynamides to enol lactones and dihydropyrroles, respectively (the latter via an Alder-ene reaction). The gold nanoparticles were immobilized on thiol-functionalized microcrystalline cellulose and characterized by electron microscopy (HAADF-STEM) and by XPS. The thiol-stabilized gold nanoparticles (Au) were obtained in the size range 1.5-6 nm at the cellulose surface. The robust and sustainable cellulose-supported gold nanocatalyst can be recycled for multiple cycles without losing activity.
在此，我们描述了纳米金高效催化炔酸和烯炔酰胺分别环异构化为烯醇内酯和二氢吡咯（后者通过Alder-烯反应）。金纳米颗粒固定在硫醇功能化微晶纤维素上，并通过电子显微镜（高角度环形暗场扫描透射电子显微镜）和X射线光电子能谱进行表征。在纤维素表面获得了尺寸范围为1.5 - 6 nm的硫醇稳定金纳米颗粒（Au）。这种坚固且可持续的纤维素负载金纳米催化剂可以循环使用多个周期而不失活。
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