期刊
ORGANIC CHEMISTRY FRONTIERS
卷 9, 期 16, 页码 4341-4346出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2qo00742h
关键词
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资金
- National Natural Science Foundation of China [82073997, 22001024]
- Sichuan Science and Technology Program [2021YFS0044, 2021YJ0402]
- Xinglin Scholar Research Promotion Project of Chengdu University of TCM
This study discloses for the first time the visible-light-mediated sequential Wolff rearrangement and Staudinger cycloaddition, which utilize in situ generated ketenes and pyrazolone ketimines to assemble valuable spiro-pyrazolone-beta-lactams. This powerful approach exhibits high yield, good substrate tolerance, and gram-scale capacity, providing straightforward access to multisubstituted pyrazole-morpholine skeletons.
Visible-light-mediated sequential Wolff rearrangement and Staudinger cycloaddition for the assembly of valuable spiro-pyrazolone-beta-lactams for the first time is disclosed by utilizing in situ generated ketenes and pyrazolone ketimines. This powerful approach features high yield, good substrate tolerance, and gram-scale capacity, and provides straightforward access to multisubstituted pyrazole-morpholine skeletons. The control experiments indicate that visible-light-mediated irradiation plays an essential role in the cyclization process, and a plausible mechanism is proposed to explain the observed efficiency.
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