tert-butyl (2R)-pyrrolidine-2-carboxylate

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

Procedure: Z-L-Phe-OH (2.25 g, 7.5 mmol) and H-D-Pro-OtBu (0.862 g, 5.0 mmol) were dissolved in DMF (10 ml), mixed with HOBt H2O (766 mg, 5.0 mmol), BOP (3.3 g, 7.5 mmol) and triethylamine (1.75 ml, 12.5 mmol) under ice cooling, and then stirred for 2 hours. After the reaction mixture was concentrated, it was re-dissolved in ethyl acetate and washed sequentially with 10% citric acid, 4% NaHCO3 and brine. After drying over anhydrous MgSO4 and concentrating, the oily residue was purified by flash chromatography on silica gel (CHCl3/MeOH=99/1) to yield 1.403 g (62%) of the titled compound as an oil. After the reaction mixture was concentrated it was re-dissolved in ethyl acetate washed sequentially with 10% citric acid, 4% NaHCO3 and brine After drying over anhydrous MgSO4 concentrating the oily residue was purified by flash chromatography on silica gel (CHCl3/MeOH=99/1)

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

Procedure: Z-L-Phe-OH (2.25 g, 7.5 mmol) and H-D-Pro-OtBu (0.862 g, 5.0 mmol) were dissolved in DMF (10 ml), mixed with HOBt H2O (766 mg, 5.0 mmol), BOP (3.3 g, 7.5 mmol) and triethylamine (1.75 ml, 12.5 mmol) under ice cooling, and then stirred for 2 hours. After the reaction mixture was concentrated, it was re-dissolved in ethyl acetate and washed sequentially with 10% citric acid, 4% NaHCO3 and brine. After drying over anhydrous MgSO4 and concentrating, the oily residue was purified by flash chromatography on silica gel (CHCl3/MeOH=99/1) to yield 1.403 g (62%) of the titled compound as an oil. After the reaction mixture was concentrated it was re-dissolved in ethyl acetate washed sequentially with 10% citric acid, 4% NaHCO3 and brine After drying over anhydrous MgSO4 concentrating the oily residue was purified by flash chromatography on silica gel (CHCl3/MeOH=99/1)

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

Procedure: Z-L-Phe-OH (2.25 g, 7.5 mmol) and H-D-Pro-OtBu (0.862 g, 5.0 mmol) were dissolved in DMF (10 ml), mixed with HOBt H2O (766 mg, 5.0 mmol), BOP (3.3 g, 7.5 mmol) and triethylamine (1.75 ml, 12.5 mmol) under ice cooling, and then stirred for 2 hours. After the reaction mixture was concentrated, it was re-dissolved in ethyl acetate and washed sequentially with 10% citric acid, 4% NaHCO3 and brine. After drying over anhydrous MgSO4 and concentrating, the oily residue was purified by flash chromatography on silica gel (CHCl3/MeOH=99/1) to yield 1.403 g (62%) of the titled compound as an oil. After the reaction mixture was concentrated it was re-dissolved in ethyl acetate washed sequentially with 10% citric acid, 4% NaHCO3 and brine After drying over anhydrous MgSO4 concentrating the oily residue was purified by flash chromatography on silica gel (CHCl3/MeOH=99/1)

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

Procedure: Prepared according to the method of example 30, using 2,6-dichloro-N-(cyclohexylmethyl)-5-quinolinecarboxamide (Example 43(a)) (200 mg) and D-proline, 1,1-dimethylethyl ester (310 mg). Purification (SiO2, ethyl acetate:isohexane 30:70 as eluant) gave the sub-title compound as an oil (250 mg). Prepared Purification (SiO2, ethyl acetate:isohexane 30:70 as eluant)

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

Procedure: A suspension of 4-(trifluoromethyl)phenylboronic acid (190 mg), copper (II) acetate (27 mg) and 4 Å molecular sieves (188 mg) in dichloromethane (4 mL) was stirred at room temperature for 5 min, and (R)-tert-butyl pyrrolidine-2-carboxylate (86 mg) in acetonitrile (0.5 mL) was added followed by triethylamine (0.07 mL). The reaction vial was flushed with oxygen, sealed and stirred at 50° C. for 24 h. The reaction mixture was filtered through a pad of Celite, and the filtrate was evaporated in vacuo. The residue was purified by preparative TLC eluting with 10% ethyl acetate/90% hexanes to give the title compound as a colorless oil (43 mg). HPLC retention time: 1.99 min (method A). MS (ESI) (M+H)+ 316.14. 1H NMR (400 MHz, CDCl3) δ 7.41 (1H, d, J=8.4 Hz), 6.52 (1H, d, J=8.4 Hz), 4.15 (1H, m), 3.53 (1H, m), 3.40 (1H, m), 2.0-2.3 (3H, m), 1.41 (9H, s). The reaction vial was flushed with oxygen sealed stirred at 50° C. for 24 h The reaction mixture was filtered through a pad of Celite the filtrate was evaporated in vacuo The residue was purified by preparative TLC eluting with 10% ethyl acetate/90% hexanes

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

Procedure: A suspension of 4-(trifluoromethyl)phenylboronic acid (190 mg), copper (II) acetate (27 mg) and 4 Å molecular sieves (188 mg) in dichloromethane (4 mL) was stirred at room temperature for 5 min, and (R)-tert-butyl pyrrolidine-2-carboxylate (86 mg) in acetonitrile (0.5 mL) was added followed by triethylamine (0.07 mL). The reaction vial was flushed with oxygen, sealed and stirred at 50° C. for 24 h. The reaction mixture was filtered through a pad of Celite, and the filtrate was evaporated in vacuo. The residue was purified by preparative TLC eluting with 10% ethyl acetate/90% hexanes to give the title compound as a colorless oil (43 mg). HPLC retention time: 1.99 min (method A). MS (ESI) (M+H)+ 316.14. 1H NMR (400 MHz, CDCl3) δ 7.41 (1H, d, J=8.4 Hz), 6.52 (1H, d, J=8.4 Hz), 4.15 (1H, m), 3.53 (1H, m), 3.40 (1H, m), 2.0-2.3 (3H, m), 1.41 (9H, s). The reaction vial was flushed with oxygen sealed stirred at 50° C. for 24 h The reaction mixture was filtered through a pad of Celite the filtrate was evaporated in vacuo The residue was purified by preparative TLC eluting with 10% ethyl acetate/90% hexanes

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

Procedure: The sub-title compound was synthesized by the method of example 1 step (vii) from the product of example 1 step (v) (200 mg) and (R)-tert-butyl pyrrolidine-2-carboxylate (108 mg). The sub-title compound (234 mg) was obtained as a colourless amorphous solid; LC-MS: m/z 611.

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (R)-tert-butyl pyrrolidine-2-carboxylate (485 mg) was added to the mixture of potassium carbonate (393 mg), potassium iodide (31 mg) and the crude product from step (viii) in CH3CN (20 mL). After the mixture was stirred at 70° C. for 16 h, the reaction mixture was cooled to RT, diluted with water and extracted with EtOAc. The combined organic layer was washed with water and brine, dried and concentrated under reduced pressure. The residue was purified by flash column chromatography on amino silica gel to afford the sub-title compound (975 mg) as a white amorphous solid; 1H NMR (300 MHz, CDCl3); 6.92 (2H, s), 6.67 (1H, d), 6.39 (1H, d), 6.30 (1H, dd), 4.64 (2H, br s), 4.03-3.90 (2H, m), 3.76 (3H, s), 3.73 (2H, s), 3.20-3.00 (2H, m), 2.96-2.80 (1H, m), 2.66-2.50 (1H, m), 2.57 (6H, s), 2.46-2.30 (1H, m), 2.28 (3H, s), 2.22 (3H, s), 2.21-1.74 (6H, m), 1.43 (9H, s); LC-MS: m/z 655. the reaction mixture was cooled to RT extracted with EtOAc The combined organic layer was washed with water and brine dried concentrated under reduced pressure The residue was purified by flash column chromatography on amino silica gel

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (R)-tert-butyl pyrrolidine-2-carboxylate (485 mg) was added to the mixture of potassium carbonate (393 mg), potassium iodide (31 mg) and the crude product from step (viii) in CH3CN (20 mL). After the mixture was stirred at 70° C. for 16 h, the reaction mixture was cooled to RT, diluted with water and extracted with EtOAc. The combined organic layer was washed with water and brine, dried and concentrated under reduced pressure. The residue was purified by flash column chromatography on amino silica gel to afford the sub-title compound (975 mg) as a white amorphous solid; 1H NMR (300 MHz, CDCl3); 6.92 (2H, s), 6.67 (1H, d), 6.39 (1H, d), 6.30 (1H, dd), 4.64 (2H, br s), 4.03-3.90 (2H, m), 3.76 (3H, s), 3.73 (2H, s), 3.20-3.00 (2H, m), 2.96-2.80 (1H, m), 2.66-2.50 (1H, m), 2.57 (6H, s), 2.46-2.30 (1H, m), 2.28 (3H, s), 2.22 (3H, s), 2.21-1.74 (6H, m), 1.43 (9H, s); LC-MS: m/z 655. the reaction mixture was cooled to RT extracted with EtOAc The combined organic layer was washed with water and brine dried concentrated under reduced pressure The residue was purified by flash column chromatography on amino silica gel

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

Procedure: To a stirred solution of 5.0 g (29.2 mmol) D-Proline tert-butyl ester and 4.5 ml (32.1 mmol) triethylamine in 180 ml dichloromethane at 0° C. was added dropwise 3.6 ml (43.8 mmol) acryloyl chloride and stirring continued for 48 h at room temperature. The reaction mixture was then washed sequentially with water, saturated ammonium chloride solution, once more with water and then with saturated brine, and the aqueous phases back-extracted with dichloromethane. The combined organic extracts were dried over sodium sulphate and concentrated in vacuo to afford 6.6 g (100%) of the title compound as a yellow oil. The reaction mixture was then washed sequentially with water, saturated ammonium chloride solution, once more with water with saturated brine, and the aqueous phases back-extracted with dichloromethane The combined organic extracts were dried over sodium sulphate concentrated in vacuo

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

Procedure: (R)-Pyrrolidine-2-carboxylic acid tert-butyl ester (16.11 g, 94.1 mmol) in DCM (250 ml) under an inert atmosphere of argon is treated with triethyl amine (26 ml, 188 mmol) and then cooled to 0° C. with a ice bath. To this cooled solution is added dropwise ethyl chloroformate (8.99 ml, 94.1 mmol) and the reaction mixture is left to stir at 0° C. for 3 hours. The reaction mixture is washed with 1M HCl (2×100 ml), water, brine, dried over MgSO4 and concentrated in vacuo to yield the titled compound as a clear oil. the reaction mixture is left The reaction mixture is washed with 1M HCl (2×100 ml), water, brine dried over MgSO4 concentrated in vacuo

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

Procedure: To a stirred solution of 5.0 g (29.2 mmol) D-Proline tert-butyl ester and 4.5 ml (32.1 mmol) triethylamine in 180 ml dichloromethane at 0° C. was added dropwise 3.6 ml (43.8 mmol) acryloyl chloride and stirring continued for 48 h at room temperature. The reaction mixture was then washed sequentially with water, saturated ammonium chloride solution, once more with water and then with saturated brine, and the aqueous phases back-extracted with dichloromethane. The combined organic extracts were dried over sodium sulphate and concentrated in vacuo to afford 6.6 g (100%) of the title compound as a yellow oil. MS m/e (%): 243 (M+NH4+, 33), 226 (M+H+, 100). The reaction mixture was then washed sequentially with water, saturated ammonium chloride solution, once more with water with saturated brine, and the aqueous phases back-extracted with dichloromethane The combined organic extracts were dried over sodium sulphate concentrated in vacuo