1: 4,8-dihydrobenzo[1,2-b:4,5-b']dithiophene-4,8-dione With sodium hydroxide; zinc in water 2 h; Reflux; 2: 1-bromo-hexane With Tetrahexylammonium bromide in water 16 h; Reflux;

1: lithium aluminium tetrahydride; potassium carbonate / tetrahydrofuran / 0.33 h / |Inert atmosphere; |Sonication 2: N,N-dimethyl-formamide; tetrahydrofuran; isopropyl alcohol / 0.5 h / 170 °C / |Microwave irradiation; |Inert atmosphere View Scheme

in tetrahydrofuran; N,N-dimethyl-formamide; isopropyl alcohol T=170°C; 0.5 h; Microwave irradiationInert atmosphere;