Cascade Rh(<scp>ii</scp>) and Yb(<scp>iii</scp>) catalyzed synthesis of substituted naphthofurans <i>via</i> transannulation of <i>N</i>-sulfonyl-1,2,3-triazoles with β-naphthols
An efficient cascade Rh(II) and Yb(III) catalyzed transannulation of N-sulfonyl-1,2,3-triazoles with β-naphthols has been accomplished for the synthesis of substituted naphthofurans in good yields. The reaction involves the initial rhodium catalyzed insertion of azavinyl carbene into the O–H bond followed by ytterbium catalyzed annulative C–C bond formation and concomitant aerial oxidation. The developed