Dicyclohexylcarbodiimide → 2,3-Dicyano-4-hexyloxyphenyl 5-hexylthiophene-2-carboxylate

Participants

Reaction Steps

0.50 g (2.36 mM) of 5-hexylthiophene-2-carboxylic acid (M.W.: 212), 0.58 g (2.36 mM) of 2,3-dicyanohydroquinone monohexyl ether (M.W.: 244) and 20 ml of THF were mixed and stirred. To the mixture, 0.49 g (2.36 mM) of dicyclohexylcarbodiimide (M.W.: 206) and 0.05 g of pyrrolidinopyridine were added, followed by stirring overnight at room temperature. After the reaction, the reaction mixture was subjected to filtration and the filtrate was subjected to distillation to obtain a crude product. The crude product was purified by silica gel column chromatography with the use of benzene and recrystallized from ethanol to obtain 0.55 g of an objective product (yield: 53.4%).

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