2-chloro-N-(2-chloroethyl)-N-ethylethanamine

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-[4-(4-Chloro-phenoxy)-benzenesulfonyl]-1-ethyl-piperidine-4-carboxylic acid ethyl ester was prepared according to the general method outlined in example 83 starting from [4-(4-chloro-phenoxy)-benzenesulfonyl]-acetic acid ethyl ester (4 g, 11.3 mmol) and ethyl-bis-(2-chloro-ethyl)-amine (2.32 g, 16.9 mmol). Yield 3.36 g (66%); brown oil; MS: 452.0 (M+H)+

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 5.0 g (19.6 mmol) of commercial methyl (S)-2-amino-3-tert-butoxycarbonylaminopropanoate hydrochloride and 3.3 g (19.6 mmol) of bis(2-chloroethyl)ethylamine in 50 ml of N,N-diisopropylethylamine is heated at 127° C. for 5 h. After evaporation of a maximum amount of diisopropylethylamine, the reaction medium is diluted with ethyl acetate and washed with an aqueous solution of sodium hydroxide having a concentration of 1N. The organic phase obtained is then washed with water, dried over magnesium sulfate, filtered and concentrated under vacuum. The crude product obtained is purified by chromatography on silica gel, elution being carried out with a 30/70 heptane/ethyl acetate mixture. 2.5 g (40%) of methyl (S)-3-tert-butoxycarbonylamino-2-(4-ethylpiperazin-1-yl)propanoate are obtained in the form of an oil. After evaporation of a maximum amount of diisopropylethylamine the reaction medium is diluted with ethyl acetate washed with an aqueous solution of sodium hydroxide having a concentration of 1N The organic phase obtained is then washed with water dried over magnesium sulfate filtered concentrated under vacuum The crude product obtained is purified by chromatography on silica gel, elution

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24 ml (330 mmol) of thionyl chloride are added dropwise to a solution of 20 g (150 mmol) of 2-[ethyl(2-hydroxyethyl)amino]ethanol in 200 ml of dichloromethane cooled beforehand to 0° C., and then the reaction medium is stirred at ambient temperature for 20 h. After the addition of a saturated aqueous solution of sodium hydrogen carbonate, the product is extracted with dichloromethane. The organic phase obtained is then washed with water, dried over magnesium sulfate, filtered and concentrated under vacuum. 19.5 g (76%) of bis(2-chloroethyl)ethylamine are obtained in the form of an oil. the product is extracted with dichloromethane The organic phase obtained is then washed with water dried over magnesium sulfate filtered concentrated under vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24 ml (330 mmol) of thionyl chloride are added dropwise to a solution of 20 g (150 mmol) of 2-[ethyl(2-hydroxyethyl)amino]ethanol in 200 ml of dichloromethane cooled beforehand to 0° C., and then the reaction medium is stirred at ambient temperature for 20 h. After the addition of a saturated aqueous solution of sodium hydrogen carbonate, the product is extracted with dichloromethane. The organic phase obtained is then washed with water, dried over magnesium sulfate, filtered and concentrated under vacuum. 19.5 g (76%) of bis(2-chloroethyl)ethylamine are obtained in the form of an oil. the product is extracted with dichloromethane The organic phase obtained is then washed with water dried over magnesium sulfate filtered concentrated under vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24 ml (330 mmol) of thionyl chloride are added to a solution of 20 g (150 mmol) of 2-[ethyl-(2-hydroxy-ethyl)amino]ethanol in 200 ml of dichloromethane cooled to 0° C. The reaction medium is stirred at ambient temperature for 20 h. After addition of 50 ml of water then gradual addition of a saturated aqueous solution of sodium hydrogen carbonate up to a pH of 7, the reaction medium is extracted with dichloromethane. The organic phase is washed with water, dried over magnesium sulphate, filtered and concentrated under vacuum. 19.5 g (76%) of bis(2-chloroethyl)ethylamine are obtained in the form of a brown oil. the reaction medium is extracted with dichloromethane The organic phase is washed with water dried over magnesium sulphate filtered concentrated under vacuum

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 5.0 g (19.6 mmol) of commercial methyl (S)-2-amino-3-tert-butoxycarbonylaminopropanoate hydrochloride and 3.3 g (19.6 mmol) of bis(2-chloroethyl)ethylamine in 50 ml of N,N-diisopropylethylamine is heated at 127° C. for 5 h. After evaporation of a maximum amount of diisopropylethylamine, the reaction medium is diluted with ethyl acetate and washed with an aqueous solution of sodium hydroxide having a concentration of 1N. The organic phase obtained is then washed with water, dried over magnesium sulfate, filtered and concentrated under vacuum. The crude product obtained is purified by chromatography on silica gel, elution being carried out with a 30/70 heptane/ethyl acetate mixture. 2.5 g (40%) of methyl (S)-3-tert-butoxycarbonylamino-2-(4-ethylpiperazin-1-yl)propanoate are obtained in the form of an oil. After evaporation of a maximum amount of diisopropylethylamine the reaction medium is diluted with ethyl acetate washed with an aqueous solution of sodium hydroxide having a concentration of 1N The organic phase obtained is then washed with water dried over magnesium sulfate filtered concentrated under vacuum The crude product obtained is purified by chromatography on silica gel, elution

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24 ml (330 mmol) of thionyl chloride are added dropwise to a solution of 20 g (150 mmol) of 2-[ethyl(2-hydroxyethyl)amino]ethanol in 200 ml of dichloromethane cooled beforehand to 0° C., and then the reaction medium is stirred at ambient temperature for 20 h. After the addition of a saturated aqueous solution of sodium hydrogen carbonate, the product is extracted with dichloromethane. The organic phase obtained is then washed with water, dried over magnesium sulfate, filtered and concentrated under vacuum. 19.5 g (76%) of bis(2-chloroethyl)ethylamine are obtained in the form of an oil. the product is extracted with dichloromethane The organic phase obtained is then washed with water dried over magnesium sulfate filtered concentrated under vacuum

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24 ml (330 mmol) of thionyl chloride are added dropwise to a solution of 20 g (150 mmol) of 2-[ethyl(2-hydroxyethyl)amino]ethanol in 200 ml of dichloromethane cooled beforehand to 0° C., and then the reaction medium is stirred at ambient temperature for 20 h. After the addition of a saturated aqueous solution of sodium hydrogen carbonate, the product is extracted with dichloromethane. The organic phase obtained is then washed with water, dried over magnesium sulfate, filtered and concentrated under vacuum. 19.5 g (76%) of bis(2-chloroethyl)ethylamine are obtained in the form of an oil. the product is extracted with dichloromethane The organic phase obtained is then washed with water dried over magnesium sulfate filtered concentrated under vacuum

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-[4-(4-Chloro-phenoxy)-benzenesulfonyl]-1-ethyl-piperidine-4-carboxylic acid ethyl ester was prepared according to the general method outlined in example 83 starting from [4-(4-chloro-phenoxy)-benzenesulfonyl]-acetic acid ethyl ester (4 g, 11.3 mmol) and ethyl-bis-(2-chloro-ethyl)-amine (2.32 g, 16.9 mmol). Yield 3.36 g (66%); brown oil; MS: 452.0 (M+H)+

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-[4-(4-Chloro-phenoxy)-benzenesulfonyl]-1-ethyl-piperidine-4-carboxylic acid ethyl ester was prepared according to the general method outlined in example 83 starting from [4-(4-chloro-phenoxy)-benzenesulfonyl]-acetic acid ethyl ester (4 g, 11.3 mmol) and ethyl-bis-(2-chloro-ethyl)-amine (2.32 g, 16.9 mmol). Yield 3.36 g (66%); brown oil; MS: 452.0 (M+H)+

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-[4-(4-Chloro-phenoxy)-benzenesulfonyl]-1-ethyl-piperidine-4-carboxylic acid ethyl ester was prepared according to the general method outlined in example 83 starting from [4-(4-chloro-phenoxy)-benzenesulfonyl]-acetic acid ethyl ester (4 g, 11.3 mmol) and ethyl-bis-(2-chloro-ethyl)-amine (2.32 g, 16.9 mmol). Yield 3.36 g (66%); brown oil; MS: 452.0 (M+H)+

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-[4-(4-Chloro-phenoxy)-benzenesulfonyl]-1-ethyl-piperidine-4-carboxylic acid ethyl ester was prepared according to the general method outlined in example 83 starting from [4-(4-chloro-phenoxy)-benzenesulfonyl]-acetic acid ethyl ester (4 g, 11.3 mmol) and ethyl-bis-(2-chloro-ethyl)-amine (2.32 g, 16.9 mmol). Yield 3.36 g (66%); brown oil; MS: 452.0 (M+H)+