Synthesis and isomerization of the novel heterotriptycene, 8-hydroxy-2,4,5′,6-tetramethyl-4,8-dihydro-4,8[3′,2′]thiophenobenzo[1,2-b : 5,4-b′]dithiophene
Abstract
The reaction of 1,1,1-tris(2-lithio-5-methyl-3-thienyl)ethane with diethyl carbonate yields the novel heterotriptycene 2, which isomerizes to ketone 7 either by heating or under acidic or basic conditions.