期刊
ORGANIC CHEMISTRY FRONTIERS
卷 8, 期 13, 页码 3286-3291出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qo00064k
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资金
- National Natural Science Foundation of China [82003585, 21971224]
- Postgraduate Education Reform Project of Henan Province [2019SJGLX008Y, 2019SJGLX034Y]
- Postgraduate Education Reform and Quality Improvement Project of Henan Province [YJS2021AL079]
A general transition-metal-free photocatalytic decarboxylative 3-alkylation reaction of 2-aryl-2H-indazoles was developed under visible-light irradiation using dimethyl carbonate as a green solvent, 4CzIPN as a photocatalyst, and alkyl N-hydroxyphthalimide esters as alkylating reagents. Various alkylated 2-aryl-2H-indazoles were synthesized in moderate to good yields, and the protocol was successfully applied to the late-stage modification of drug molecules.
A general transition-metal-free photocatalytic decarboxylative 3-alkylation reaction of 2-aryl-2H-indazoles was developed under visible-light irradiation under mild conditions. By employing dimethyl carbonate as a green solvent, 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) as an inexpensive photocatalyst, and alkyl N-hydroxyphthalimide esters as alkylating reagents, various primary, secondary, and tertiary alkylated 2-aryl-2H-indazoles were synthesized in moderate to good yields. Moreover, the protocol was successfully applied to the late-stage modification of drug molecules.
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