4.7 Article

CuBr-mediated synthesis of 1,4-naphthoquinones via ring expansion of 2-aryl-1,3-indandiones

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CHEMICAL COMMUNICATIONS
卷 59, 期 82, 页码 12326-12329

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d3cc03753c

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This study reports a CuBr-mediated direct insertion reaction of alkenes, providing a new strategy for the synthesis of 1,4-naphthoquinones through ring expansion. In contrast to existing methods, the alkenes here act as C1 units in the annulation reaction. This reaction enables the synthesis of highly functionalized 1,4-naphthoquinones with high yields, good functional group tolerance, and high atom economy.
A CuBr-mediated direct insertion of alkenes into unstrained ring 2-aryl-1,3-indandiones is reported, which provides a one-carbon ring expansion strategy for the synthesis of 1,4-naphthoquinones. Entirely differing from the existing reports, the alkenes herein behave as C1 units to participate in annulation reactions. This transformation provides a facile route to access a class of highly functionalized 1,4-naphthoquinones with good yields, good functional-group tolerance and high atom-economy. Further research on the application of this reaction is currently underway in our laboratory.

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