3-[(1-benzylpiperidin-4-yl)amino]propan-1-ol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 16.5 g of 3-aminopropanol and 41.7 g of 1-benzyl-4-piperidone are dissolved in 350 ml of methylene chloride and 56 g of sodium triacetoxy-borohydride are slowly added at about 10° C. The mixture is stirred overnight at ambient temperature, then acidified with dilute hydrochloric acid while cooling and then made alkaline with conc. sodium hydroxide solution. The organic phase is separated off, the aqueous phase is washed once more with 150 ml of methylene chloride. The combined organic phases are dried over sodium sulphate and the solvent is eliminated in vacuo. 32 g of 1-benzyl-4-(3-hydroxy-propylamino)-piperidine are obtained as a yellow oil, which is used without further purification in the next reaction step. while cooling The organic phase is separated off the aqueous phase is washed once more with 150 ml of methylene chloride The combined organic phases are dried over sodium sulphate

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: This material was prepared from 4-(3-hydroxypropyl)amino-1-benzylpiperidine by the same route employed in the synthesis of N-(3-amidinophenyl)-N'-(1-benzylpiperidin-4-yl)cyclopentylurea. There was obtained 26 mg of the desired product as the bis-tifluoroacetic acid salt after purification by reverse phase HPLC. LRMS (M+2H)2+ m/z 196.7, (M+H)+ m/z 392;1H NMR (CD3OD): d 2.23 (m, 6H), 3.21 (bt, 2H), 3.58 (t, 2H, J=5.12 Hz), 3.62 (m, 2H), 4.39 (m, 3H), 4.53 (t, 2H, J=5.12 Hz), 7.51 (m, 5H), 7.62-7.78 (m, 3H), 7.81 (s, 1H).

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

Procedure: 16.5 g of 3-aminopropanol and 41.7 g of 1-benzyl-4-piperidone are dissolved in 350 ml of methylene chloride and 56 g of sodium triacetoxy-borohydride are slowly added at about 10° C. The mixture is stirred overnight at ambient temperature, then acidified with dilute hydrochloric acid while cooling and then made alkaline with conc. sodium hydroxide solution. The organic phase is separated off, the aqueous phase is washed once more with 150 ml of methylene chloride. The combined organic phases are dried over sodium sulphate and the solvent is eliminated in vacuo. 32 g of 1-benzyl-4-(3-hydroxy-propylamino)-piperidine are obtained as a yellow oil, which is used without further purification in the next reaction step. while cooling The organic phase is separated off the aqueous phase is washed once more with 150 ml of methylene chloride The combined organic phases are dried over sodium sulphate

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 16.5 g of 3-aminopropanol and 41.7 g of 1-benzyl-4-piperidone are dissolved in 350 ml methylene chloride and at about 10° C. 56 g of sodium triacetoxy-borohydride are slowly added. The mixture is stirred overnight at ambient temperature, then acidified with dilute hydrochloric acid with cooling and subsequently made alkaline with conc. sodium hydroxide solution. The organic phase is separated off, the aqueous phase is washed once again with 150 ml of methylene chloride. The combined organic phases are dried over sodium sulphate and freed from solvent in vacuo. 32 g 1-benzyl-4-(3-hydroxy-propylamino)-piperidine are obtained as a yellow oil which is used in the next reaction step without any further purification. with cooling The organic phase is separated off the aqueous phase is washed once again with 150 ml of methylene chloride The combined organic phases are dried over sodium sulphate

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

Procedure: 16.5 g of 3-aminopropanol and 41.7 g of 1-benzyl-4-piperidone are dissolved in 350 ml methylene chloride and at about 10° C. 56 g of sodium triacetoxy-borohydride are slowly added. The mixture is stirred overnight at ambient temperature, then acidified with dilute hydrochloric acid with cooling and subsequently made alkaline with conc. sodium hydroxide solution. The organic phase is separated off, the aqueous phase is washed once again with 150 ml of methylene chloride. The combined organic phases are dried over sodium sulphate and freed from solvent in vacuo. 32 g 1-benzyl-4-(3-hydroxy-propylamino)-piperidine are obtained as a yellow oil which is used in the next reaction step without any further purification. with cooling The organic phase is separated off the aqueous phase is washed once again with 150 ml of methylene chloride The combined organic phases are dried over sodium sulphate

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

Procedure: This material was prepared from 4-(3-hydroxypropyl)amino-1-benzylpiperidine by the same route employed in the synthesis of N-(3-amidinophenyl)-N'-(1-benzylpiperidin-4-yl)cyclopentylurea. There was obtained 26 mg of the desired product as the bis-tifluoroacetic acid salt after purification by reverse phase HPLC. LRMS (M+2H)2+ m/z 196.7, (M+H)+ m/z 392;1H NMR (CD3OD): d 2.23 (m, 6H), 3.21 (bt, 2H), 3.58 (t, 2H, J=5.12 Hz), 3.62 (m, 2H), 4.39 (m, 3H), 4.53 (t, 2H, J=5.12 Hz), 7.51 (m, 5H), 7.62-7.78 (m, 3H), 7.81 (s, 1H).

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

Procedure: 16.5 g of 3-aminopropanol and 41.7 g of 1-benzyl-4-piperidone are dissolved in 350 ml of methylene chloride and 56 g of sodium triacetoxy-borohydride are slowly added at about 10° C. The mixture is stirred overnight at ambient temperature, then acidified with dilute hydrochloric acid while cooling and then made alkaline with conc. sodium hydroxide solution. The organic phase is separated off, the aqueous phase is washed once more with 150 ml of methylene chloride. The combined organic phases are dried over sodium sulphate and the solvent is eliminated in vacuo. 32 g of 1-benzyl-4-(3-hydroxy-propylamino)-piperidine are obtained as a yellow oil, which is used without further purification in the next reaction step. while cooling The organic phase is separated off the aqueous phase is washed once more with 150 ml of methylene chloride The combined organic phases are dried over sodium sulphate