(+)-METHYL (S)-3-HYDROXYPENTANOATE

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 6.22 mg (48 mmol) of methyl 3-ketovalerate in 48 ml methanol, 36 mg (0.004 mmol) RuCl2(S)-binap was added and stirred in an autoclave under a hydrogen pressure of 30 atm at 80° C. for 66 hours. After concentration and distillation, 5.71 g (43.2 mmol, 97% ee) of methyl (S)-3-hydroxyvalerate was obtained. The condition of chiral HPLC is the following. Column, CHIRALPAK OD manufactured by Daicel Chemical Industries, Ltd.; Eluate, Hexane:2-propanol=95:5; flow rate, 1.0 mL/min; Wavelength of detection, 210 nm; Temperature, 25° C.; Retention time, 15 min (R) and 27 min (S). After concentration and distillation

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

Procedure: The title compound, white solid (66 mg, 77%), MS (ISP) m/z=431.4 [(M+H)+], mp 158° C., was prepared in accordance with the general method of example 2 from trans-4-{2-[4-(2,3-dihydrofuro[3,2-c]pyridin-4-yl)-piperazin-1-yl]-ethyl}-cyclohexanamine trihydrochloride (intermediate C) (88 mg, 0.2 mmol) and (S)-methyl 3-hydroxy-pentanoate.

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

Procedure: The title compound, white solid (99 mg, 93%), MS (ISP) m/z=427.3 [(M+H)+], mp 140° C., was prepared in accordance with the general method of example 46 from trans-4-[2-(4-benzofuran-3-yl-piperidin-1-yl)-ethyl]-cyclohexylamine dihydrochloride (intermediate A) (100 mg, 0.25 mmol) and (S)-methyl 3-hydroxypentanoate.

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

Procedure: The title compound, white solid (104 mg, 97%), MS (ISP) m/z=431.5 [(M+H)+], mp 217° C., was prepared in accordance with the general method of example 5 from trans-4-{2-[4-(2,3-dihydro-furo[2,3-c]pyridin-7-yl)-piperazin-1-yl]-ethyl}-cyclohexylamine trihydrochloride (intermediate B) (110 mg, 0.25 mmol) and (S)-methyl 3-hydroxy-pentanoate.

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 6.22 mg (48 mmol) of methyl 3-ketovalerate in 48 ml methanol, 36 mg (0.004 mmol) RuCl2(S)-binap was added and stirred in an autoclave under a hydrogen pressure of 30 atm at 80° C. for 66 hours. After concentration and distillation, 5.71 g (43.2 mmol, 97% ee) of methyl (S)-3-hydroxyvalerate was obtained. The condition of chiral HPLC is the following. Column, CHIRALPAK OD manufactured by Daicel Chemical Industries, Ltd.; Eluate, Hexane:2-propanol=95:5; flow rate, 1.0 mL/min; Wavelength of detection, 210 nm; Temperature, 25° C.; Retention time, 15 min (R) and 27 min (S). After concentration and distillation