Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 85, Issue 16, Pages 10638-10647Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.0c01207
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Funding
- Natural Science Foundation of Zhejiang Province [LQ20B020005]
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An environmentally benign system for the direct alkylation of lawsones and 4-hydroxycoumarins with alcohols in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) is reported. The reaction proceeded smoothly via a dehydrative cross-coupling process by utilizing the unique properties of HFIP. A variety of alkylated products and subsequent one-pot cyclized products (pyranonaphthoquinones and pyranocoumarins) could be obtained in 40-93% yields.
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