2-methyl-phenylethynylboronic acid MIDA ester 在
[1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene]gold bis(trifluoromethanesulfonyl)imidate 、
8-isopropylquinoline N-oxide 作用下,
以75 %的产率得到6-methyl-2-(1-oxo-2,3-dihydro-1H-inden-2-yl)-1,3,6,2-dioxazaborocane-4,8-dione