Abstract
2,2′:5′,2′′-Terthiazole,
a previously unknown terthiazole isomer, was prepared by copper-mediated
oxidative coupling of 2-lithiothiazole. The yield was improved in
the presence of equimolar 2,2′-bithiazole. The 5,5′′-positions
were cleanly lithiated by lithium diisopropylamide, which demonstrates
its potential in the extension of π-systems.
Key words
thiazole - copper - coupling - lithiation - oligomer
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