3-(Tri-n-butylstannyl)-4-lithiofuran 2, obtained through tin–lithium exchange from 3,4-bis(tri-n-butylstannyl)furan 1, reacts regiospecifically with various electrophiles to give monosubstituted stannylfurans, which are converted into unsymmetrical 3,4-disubstituted furans utilising Stille's palladium-catalysed coupling reactions.
Y. Yang and H. N. C. Wong, J. Chem. Soc., Chem. Commun., 1992, 1723 DOI: 10.1039/C39920001723
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