Diethylene Glycol → 2-Hexylthiophene

Participants

Reaction Conditions

Reaction Steps

In a 10 liter-five-necked flask, 300 g (1.65 mol) of 2-hexanoylthiophene, 582.1 ml of 60% hydrazine hydrate and 5 liter of diethyleneglycol were placed and reacted for 2 hours at 180° C. with distilling-off of excessive water and hydrazine hydrate. The mixture was cooled to 110° C. and 313.7 g of KOH was added thereto, followed by heating again for 2 hours of reaction at 180° C. After the reaction, the reaction mixture was poured into 10 liter of water, extracted two times with 2 liter of isopropyl ether and washed four times with 2 liter of water, followed by drying with CaCl2 and distilling-off of the solvent to obtain 285 g of a crude product. The crude product was subjected to reduced-pressure distillation in an atmosphere of nitrogen to obtain 230 g of a pure product (yield: 83%).

Provenance & Evidence