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- W2951245698 abstract "A new class of cyclopropenes containing a chroman-4-one motif were synthesized using 3-diazochroman-4-one and phenylacetylene with rhodium(II) catalyst and followed by cycloisomerization to give 2-substituted or 3-substituted 4H-furo[3,2-c]chromene, respectively. Using BF3·Et2O as catalyst, 2-substituted 4H-furo[3,2-c]chromene was exclusively obtained in 70% yield. Using Cu(OTf)2 as catalyst, 3-substituted 4H-furo[3,2-c]chromene was obtained in 95% yield with 98:2 regioselectivity. A one-pot cascade addition–cycloisomerization process was also developed with no need to isolate cyclopropenes of chroman-4-one intermediates." @default.
- W2951245698 created "2019-06-27" @default.
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- W2951245698 date "2014-10-23" @default.
- W2951245698 modified "2023-10-18" @default.
- W2951245698 title "One-Pot Novel Regioselective Cycloisomerization Synthesis of 2-Substituted or 3-Substituted 4<i>H</i>-Furo[3,2-<i>c</i>]chromene through the Intermediate Cyclopropenes of 3-Diazochroman-4-one and Phenylacetylene" @default.
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- W2951245698 doi "https://doi.org/10.1021/ol502854y" @default.
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