Dichloromethane → 4-[5-(4-(ethanesulphonyl)piperazin-1-yl)pyridin-2-yl]-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester

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Reaction Steps

0.8 g of 4-(5-(piperazin-1-yl)pyridin-2-yl)-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester is placed in a 25 ml round-bottomed flask. ml of dichloromethane are added, followed by 0.37 ml of triethylamine and finally 0.23 ml of ethylsulphonyl chloride. The reaction mixture is stirred at ambient temperature for 3 h, then washed twice with water and once with a saturated sodium chloride solution and then evaporated under reduced pressure. 0.98 g of 4-[5-(4-(ethanesulphonyl)piperazin-1-yl)pyridin-2-yl]-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester is obtained.

Provenance & Evidence