1-Piperazinecarboxylic acid, ethyl ester → HCID 21416190, compound

Participants

Reaction Steps

24 G. of 2,10-dichloro-8-fluoro-10,11-dihydro-dibenzo[b,f]thiepin in 80 ml. of chloroform are heated together with 38.4 g. of 1-carbethoxy-piperazine under reflux conditions for 20 hours. The reaction mixture is poured over ice water and extracted with chloforom. The organic phase is dried over magnesium sulfate and evaporated under reduced pressure, whereby there is obtained oily 1-carbethoxy-4-(2-chloro-8-fluoro-10,11-dihydro-dibenzo [b,f]thiepin-10-yl)-piperazine. 24.5 G. of 1-carbethoxy-4-(2-chloro-8-fluoro-10,11-dihydro-dibenzo[b,f]thiepin-10-yl)-piperazine, 350 ml. of ethyleneglycol, 19 g. of potassium hydroxide and 1.5 ml. of water are heated together at 160° for 1 hours. The reaction mixture is poured over water and extracted with chloroform. The organic phase is washed with water, dried over magneisum sulfate and evaporated under reduced pressure, whereby there is obtained 1-(2-chloro-8-fluoro-10,11-dihydro-dibenzo[b,f]-thiepin-10-yl)-piperazine as a thick oil.

Provenance & Evidence