The regioselective generation of arynes from polyhalogenobenzenes. An improved synthesis of syn- and anti-1,4,5,8,9,12-hexahydro-1,4:5,8:9,12-triepoxytriphenylene

Article abstract of DOI:10.1016/S0040-4020(01)89874-4

The halogenated benzenes, 1,2,4,5-tetrabromobenzene 6, hexabromobenzene 9, p-dichlorotetrabromobenzene 11, and 1,2-dibromo-4,5-dichlorobenzene 12, were investigated as 1,3-bis-, 1,4-bis-, and 1,3,5-tris-aryne precursors by using alkyllithiums and alkali m