Twin benzannulation of naphthalene via 1,3-, 1,6-, and 2,6-naphthodiyne synthetic equivalents. New syntheses of triphenylene, benz[a]anthracene, and naphthacene
Twin benzannulation of naphthalene via 1,3-, 1,6-, and 2,6-naphthodiyne synthetic equivalents. New syntheses of triphenylene, benz[a]anthracene, and naphthacene