(2S)-2-methylpiperidine

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

Procedure: The title compound was prepared in a manner substantially the same as intermediate (2R,3′S)-2-Methyl-[1,3′]bipyrrolidinyl-1′-carboxylic acid tert-butyl ester by condensing 3-(3R)-(toluene-4-sulfonyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester (5 g) with (S)-2-Methyl-piperidine to get 1.50 g (38% yield) of the product as a beige oil.

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

Procedure: The title compound was synthesized in the manner essentially the same as the Example 9 by condensing cis-methanesulfonic acid 4-[4-(1-oxo-8-oxa-2-aza-spiro[4.5]dec-2-yl)-phenyl]-cyclohexyl ester (Intermediate 21) (30 mg, 0.07 mmol, 1 equiv.) and (S)-2-methyl-piperidine.

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

Procedure: The title compound was synthesized in the manner essentially the same as the Example 9 by condensing cis-methanesulfonic acid 4-[4-(1-oxo-8-oxa-2-aza-spiro[4.5]dec-2-yl)-phenyl]-cyclohexyl ester (Intermediate 21) (30 mg, 0.07 mmol, 1 equiv.) and (S)-2-methyl-piperidine.

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

Procedure: The title compound was prepared in a manner substantially the same as intermediate (iv), (2R,3′S)-2-methyl-[1,3′]bipyrrolidinyl-1′-carboxylic acid tert-butyl ester, by condensing 3-(3R)-(toluene-4-sulfonyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester (5 g) with (S)-2-Methyl-piperidine to get 1.5 g (38% yield) of the product as a beige oil.

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

Procedure: The title compound was prepared in a manner substantially the same as intermediate (2R,3′S)-2-Methyl-[1,3′]bipyrrolidinyl-1′-carboxylic acid tert-butyl ester by condensing 3-(3R)-(toluene-4-sulfonyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester (5 g) with (S)-2-Methyl-piperidine to get 1.50 g (38% yield) of the product as a beige oil.

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

Procedure: The title compound was prepared in a manner substantially the same as intermediate (2R,3′S)-2-Methyl-[1,3′]bipyrrolidinyl-1′-carboxylic acid tert-butyl ester by condensing 3-(3R)-(toluene-4-sulfonyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester (5 g) with (S)-2-Methyl-piperidine to get 1.50 g (38% yield) of the product as a beige oil.

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

Procedure: The title compound was prepared following the procedure described in Intermediate 10 Steps 1 and 2, but starting from (S)-(+)-2-methylpiperidine. It was isolated as a beige powder. 1H NMR (DMSO-d6) δ 13.29 (s, 1H), 8.23-8.12 (m, 2H), 7.68 (d, J=8.4 Hz, 1H), 3.07 (m, 1H), 2.94-2.81 (m, 1H), 2.61-2.45 (m, 2H), 1.75 (m, 1H), 1.67-1.18 (m, 4H), 0.71 (d, J=6.1 Hz, 3H). HPLC (Method A), Rt 4.79 min (Purity: 99.9%). LC/MS (Method B): 286.2 (M−H)−, 288.0 (M+H)+. It was isolated as a beige powder

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

Procedure: (S)-2-methylpiperidine (270 μl, 2.24 mmol, commercially available product) was added at room temperature to an N,N-dimethylformamide (DMF; 0.5 ml) solution of 1-fluoro-2-nitro-4-(trifluoromethyl)benzene (211 mg, 1.00 mmol, commercially available product). The resulting mixture was stirred for two hours. Water was added to the mixture, and the resulting mixture was extracted three times with ethyl acetate. The obtained organic layer was washed with a saturated sodium chloride solution, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20 g, hexane/ethyl acetate=12/1). Thus, (S)-1-[2-nitro-4-(trifluoromethyl)phenyl]-2-methylpiperidine (286 mg, 99.2%) was yielded as an orange-colored oily material. the resulting mixture was extracted three times with ethyl acetate The obtained organic layer was washed with a saturated sodium chloride solution dried over anhydrous sodium sulfate filtered concentrated under reduced pressure The residue was purified by silica gel column chromatography (20 g, hexane/ethyl acetate=12/1)

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

Procedure: (S)-2-methylpiperidine (270 μl, 2.24 mmol, commercially available product) was added at room temperature to an N,N-dimethylformamide (DMF; 0.5 ml) solution of 1-fluoro-2-nitro-4-(trifluoromethyl)benzene (211 mg, 1.00 mmol, commercially available product). The resulting mixture was stirred for two hours. Water was added to the mixture, and the resulting mixture was extracted three times with ethyl acetate. The obtained organic layer was washed with a saturated sodium chloride solution, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20 g, hexane/ethyl acetate=12/1). Thus, (S)-1-[2-nitro-4-(trifluoromethyl)phenyl]-2-methylpiperidine (286 mg, 99.2%) was yielded as an orange-colored oily material. the resulting mixture was extracted three times with ethyl acetate The obtained organic layer was washed with a saturated sodium chloride solution dried over anhydrous sodium sulfate filtered concentrated under reduced pressure The residue was purified by silica gel column chromatography (20 g, hexane/ethyl acetate=12/1)

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

Procedure: The title compound was prepared in a manner substantially the same as intermediate (xi), (2S,3′S)-2-methyl-[1,3′]bipyrrolidinyl-1′-carboxylic acid tert-butyl ester by condensing 3-(3R)-(toluene-4-sulfonyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester (5 g) with (S)-2-methyl-piperidine to obtain 1.5 g (38% yield) of the title compound as a beige oil.

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

Procedure: To a pale yellow solution of triphosgene (742 mg, 2.50 mmol) and pyridine (0.404 mL, 5.00 mmol) in dry DCM (10 mL) at 10° C. under N2 was added (S)-2-methyl piperidine (Aldrich, 0.603 mL, 5.00 mmol) cautiously over 2 min. The vivid orange solution was stirred at RT for 18 h, then pyridine (0.404 mL, 5.00 mmol) and triphosgene (742 mg, 2.50 mmol) were added sequentially (CARE: exotherm on addition of triphosgene) and the orange solution stirred at RT for 4 h. Aqueous HCl solution (1M, 10 mL) was added and the mixture stirred vigorously until gas evolution ceased (30 min). The aqueous layer was extracted with DCM (10 mL), then the combined organics passed through a hydrophobic fit and concentrated in vacuo to leave the title compound as a dark red oil (745 mg, 92%). 1H NMR (300 MHz, CDCl3): 1.25 (3H, d, J 7.0), 1.42-1.77 (6H, m), 3.07 (1H, br s), 4.17 (1H, dd, J 13.8, 4.0), 4.62 (1H, apparent quin, J 6.3). the orange solution stirred at RT for 4 h the mixture stirred vigorously until gas evolution (30 min) The aqueous layer was extracted with DCM (10 mL) concentrated in vacuo

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

Procedure: To a pale yellow solution of triphosgene (742 mg, 2.50 mmol) and pyridine (0.404 mL, 5.00 mmol) in dry DCM (10 mL) at 10° C. under N2 was added (S)-2-methyl piperidine (Aldrich, 0.603 mL, 5.00 mmol) cautiously over 2 min. The vivid orange solution was stirred at RT for 18 h, then pyridine (0.404 mL, 5.00 mmol) and triphosgene (742 mg, 2.50 mmol) were added sequentially (CARE: exotherm on addition of triphosgene) and the orange solution stirred at RT for 4 h. Aqueous HCl solution (1M, 10 mL) was added and the mixture stirred vigorously until gas evolution ceased (30 min). The aqueous layer was extracted with DCM (10 mL), then the combined organics passed through a hydrophobic fit and concentrated in vacuo to leave the title compound as a dark red oil (745 mg, 92%). 1H NMR (300 MHz, CDCl3): 1.25 (3H, d, J 7.0), 1.42-1.77 (6H, m), 3.07 (1H, br s), 4.17 (1H, dd, J 13.8, 4.0), 4.62 (1H, apparent quin, J 6.3). the orange solution stirred at RT for 4 h the mixture stirred vigorously until gas evolution (30 min) The aqueous layer was extracted with DCM (10 mL) concentrated in vacuo