反应详情

19 g of 2-[4-(trans-4-n-propylcyclohexyl)-styryl]-5-n-pentylthiophene (obtainable by Friedel Crafts acylation of 2-pentylthiophene with 4-(trans-4-n-propylcyclohexyl)-phenylacetyl chloride and reduction of the resulting ketone with sodium boranate to give the alcohol, followed by dehydration) and 5 g of sulfur are heated to 220° for 3 hours. Subsequent working-up by chromatography gives 8.3 g of 2-[4-trans-4-n-propylcyclohexylphenyl]-5-n-pentylthieno[3,2-b]thiophene.