01568nas a2200169 4500008004100000245009400041210006900135260000800204300001600212490000700228520094200235100002901177700002601206700002401232700002201256856012001278 2014 eng d00aTandem [4 + 2]/[2 + 2] cycloaddition reactions involving indene or benzofurans and arynes0 aTandem 4 22 2 cycloaddition reactions involving indene or benzof cJUN a3576–35790 v163 a

The reaction of arynes with indene/benzofurans has been developed. The arynes were generated from 2-(trimethylsilyl)aryl triflates by the fluoride-induced 1,2-elimination react with indene or various benzofurans proceeding via a cascade reaction involving the Diels–Alder reaction and a [2 + 2] cycloaddition reaction. The tandem process afforded functionalized dihydrobenzocyclobutaphenanthrenes in moderate to good yields. Moreover, the method has been utilized for the one-pot synthesis of benzo[b]fluoranthene.

1 aBhojgude, Sachin, Suresh1 aThangaraj, Manikandan1 aSuresh, Eringathodi1 aBiju, Akkattu, T. uhttps://library.ncl.res.in/content/tandem-4-22-2-cycloaddition-reactions-involving-indene-or-benzofurans-and-arynes