期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 85, 期 14, 页码 9201-9212出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.0c01177
关键词
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资金
- National Natural Science Foundation of China [21771131, 21971182]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Project of the Scientific and Technologic Infrastructure of Suzhou [SZS201708, SZS201905]
An efficient method for visible-light-initiated, nickel-catalyzed Sonogashira C(sp)-C(sp(2)) coupling has been developed via an energy-transfer mode. Thioxanthen-9-one as a photosensitizer could significantly accelerate the arylation of alkynes with a wide range of (hetero)aryl halides in high yields. The cross-coupling reaction undergoes the stepwise oxidative addition of an arylhalide to nickel(0), transmetalation of the resulting aryl- Ni(II) halide species with Zn(II) acetylide into aryl-Ni(II) acetylide species, energy transfer from the excited state of thioxanthen-9-one to aryl-Ni(II) acetylide, and reductive elimination to the aryl alkyne.
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