An efficientapproach to 2,5-disubstitutedfurans has been developed by utilizing gold-catalyzed sequential nucleophilic attack onto metal-complexed alkynes with complete regioselectivity. The reaction proceeds efficiently under mild conditions with commercially available catalysts to afford furans in moderate to excellent yields (up to 96 %) with high diversity.
Palladium‐Catalyzed Cross‐Coupling of Furfuryl Alcohols with Arylboronic Acids
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Aromatization‐Driven Carbon−Carbon Bond Cleavage to Synthesize 5‐Arylfurfuryl Alcohols and 2,5‐Diaryl Furans
作者:Guanghao Huang、Biaolin Yin
DOI:10.1002/adsc.201900799
日期:2019.12.17
Herein we report a protocol for novel palladium‐catalyzed cross‐coupling reactions of sustainably produced primary furfuryl alcohols with arylboronicacids to deliver 5‐arylfurfuryl alcohols and 2,5‐diaryl furans. Hammett plot analysis suggested that the reaction mechanism involved aromatization‐driven cleavage of the carbon−carbon bond of a furan oxonium ion intermediate. This protocol provides a
Aerobic oxidative α-arylation of furans with boronic acids via Pd(<scp>ii</scp>)-catalyzed C–C bond cleavage of primary furfuryl alcohols: sustainable access to arylfurans
Aerobic oxidative α-arylation of furans with boronic acids via Pd(II)-catalyzed C–Cbondcleavage of primary furfuryl alcohol provides sustainable access to arylfurans. This α-arylation protocol opens a new avenue for the transformation of readily available furans into other useful compounds.