期刊
INORGANICA CHIMICA ACTA
卷 543, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2022.121199
关键词
Homogeneous catalysis; Hydroboration; Organoaluminum compounds; Schiff bases
资金
- National Natural Science Foundation of China [21872005, 2020-JCJQ-ZD-244-00]
Organic aluminum compounds derived from halogen-substituted Schiff bases have emerged as a research hotspot in the development of green chemistry. These compounds, characterized by twisted six-membered ring structures, show excellent catalytic performance in the hydroboration of aldehydes and ketones.
In the process of the development of green chemistry, non-noble metal catalysts have become one of the research hotspots. The abundant aluminum has entered the research scope of chemists. Four organoaluminum derived from halogen-substituted Schiff bases were prepared: (2-(((2,6-difluorophenyl)imino)methyl)phenoxy)dime-thylaluminum (C1), (2-(((3-chloro-4-fluorophenyl)imino)methyl)phenoxy)dimethylaluminum (C2), (2-(((2-chlorophenyl)imino)methyl)phenoxy)diethylaluminum (C3), (2-(((4-chlorophenyl)imino)methyl)phenoxy) diethylaluminum (C4). All organoaluminum compounds were characterized using 1H NMR, 13C NMR, 19F NMR spectroscopy, and X-ray single crystal diffraction. XRD proved that the aluminum centers of these organo-aluminum compounds are all twisted six-membered ring structures. They were used for the hydroboration of aldehydes and ketones, showing excellent results. This provided an additional catalyst for the reduction of carbonyl compounds.
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