Sodium Carbonate → rac-Ethyl 5-[(2-{2-[(4-tert-butylbenzyl)oxy]phenyl}ethyl) {2-[4-(methoxycarbonyl)phenyl]ethyl}-amino]-5,6,7,8-tetrahydroquinoline-2-carboxylate

Participants

Reaction Steps

129 mg (0.65 mmol) of methyl 4-(2-chloroethyl)benzoate and 91 mg (0.86 mmol) of anhydrous sodium carbonate were added to a solution of 210 mg (0.43 mmol) of ethyl 5-[(2-{2-[(4-tert-butylbenzyl)oxy]phenyl}ethyl)amino]-5,6,7,8-tetrahydroquinoline-2-carboxylate dihydrochloride in 4 ml of dry acetonitrile, and the mixture was initially heated under reflux for 4 hours. A further 0.1 ml of methyl 4-(2-chloroethyl)benzoate was then added, and the mixture was stirred under reflux for 4 hours. Another 0.1 ml of methyl 4-(2-chloroethyl)benzoate was metered in, and the mixture was then heated under reflux overnight. Subsequently, another 0.1 ml of methyl 4-(2-chlor-oethyl)benzoate and 100 mg of anhydrous sodium carbonate were added, and the mixture was stirred under reflux for a further 5 hours. Finally, another 0.1 ml of methyl 4-(2-chloroethyl)-benzoate and 0.2 ml of methyl 4-(2-iodoethyl)benzoate were added, and the reaction mixture was stirred under reflux for 2 days. The reaction was then concentrated to dryness. The residue obtained was purified by preparative HPLC. This gave 38 mg (0.06 mmol, content 92%, 14% of theory) of the title compound as a colourless oil.

Provenance & Evidence