tert-butyl (2S)-2-(bromomethyl)pyrrolidine-1-carboxylate

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-tert-butyl-2-(bromomethyl)pyrrolidine-1-carboxylate (0.45 g, 1.7 mmol) in DMSO (1.5 mL) was added to a solution of 4-(benzyloxy)-1-(9-methyl-2,3,4,9,-tetrahydro-1H-pyrido[3,4-b]indol-7-yl)pyridine-2(1H)-one (0.33 g, 0.85 mmol), and Cs2CO3 (1.10 g, 3.4 mmol) in DMSO (2.8 mL), and the resulting solution was heated at 60° C. for 18 h. The reaction mixture was diluted with H2O and extracted with CH2Cl2 (3×25 mL). The combined organic extracts were washed with brine (2×25 mL), dried over Na2SO4 and concentrated to dryness under reduced pressure. Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film. The film was diluted with EtOAc and washed with brine (4×10 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to provide the title compound (19 mg, 3%) as a clear film: ESI MS m/z 569 [M+H]+. extracted with CH2Cl2 (3×25 mL) The combined organic extracts were washed with brine (2×25 mL) dried over Na2SO4 concentrated to dryness under reduced pressure Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film washed with brine (4×10 mL) dried over Na2SO4 filtered concentrated under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-tert-butyl-2-(bromomethyl)pyrrolidine-1-carboxylate (0.45 g, 1.7 mmol) in DMSO (1.5 mL) was added to a solution of 4-(benzyloxy)-1-(9-methyl-2,3,4,9,-tetrahydro-1H-pyrido[3,4-b]indol-7-yl)pyridine-2(1H)-one (0.33 g, 0.85 mmol), and Cs2CO3 (1.10 g, 3.4 mmol) in DMSO (2.8 mL), and the resulting solution was heated at 60° C. for 18 h. The reaction mixture was diluted with H2O and extracted with CH2Cl2 (3×25 mL). The combined organic extracts were washed with brine (2×25 mL), dried over Na2SO4 and concentrated to dryness under reduced pressure. Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film. The film was diluted with EtOAc and washed with brine (4×10 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to provide the title compound (19 mg, 3%) as a clear film: ESI MS m/z 569 [M+H]+. extracted with CH2Cl2 (3×25 mL) The combined organic extracts were washed with brine (2×25 mL) dried over Na2SO4 concentrated to dryness under reduced pressure Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film washed with brine (4×10 mL) dried over Na2SO4 filtered concentrated under reduced pressure

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

Procedure: A mixture of 1-(1H-indazol-5-yl)-4-(4-(trifluoromethyl)phenyl)pyridin-2(1H)-one (200 mg, 0.56 mmol), (S)-tert-butyl 2-(bromomethyl)pyrrolidine-1-carboxylate (GRA-B-188) (298 mg, 1.12 mmol), and cesium carbonate (732 mg, 2.25 mmol) in methyl sulfoxide (5 mL) was stirred overnight at ambient temperature. The reaction mixture was diluted with water (20 mL) and extracted with dichloromethane (2×30 mL). The combined organic extracts were washed with brine (20 mL), dried (Na2SO4), and concentrated under reduced pressure. Isolation of the desired regioisomer was performed by column chromatography (silica gel, Et2O to 9:1 Et2O/90:9:1 Et2O/MeOH/concd NH4OH). To the desired regioisomer (100 mg, 0.18 mmol) was added dichloromethane (10 mL) and trifluoroacetic acid (2 mL). After stirring at ambient temperature for 2 h, the reaction was brought to pH=9 with 1N NaOH. The organic layer was washed with brine (10 mL), dried (Na2SO4), and concentrated under reduced pressure. The dried residue (87 mg, 0.20 mmol) was dissolved in dichloromethane (10 mL) and HCl (1.25 M solution in methanol, 0.22 mL, 0.17 mmol) was added. The mixture was concentrated under reduced pressure and then triturated with dichloromethane/hexanes and the obtained solid was triturated with diethyl ether. The solid was dried to afford the title compound (43 mg, 16%) as an off-white solid: mp 241-245° C.; 1H NMR (500 MHz, DMSO-d6) δ 9.05 (br s, 2H), 8.28 (s, 1H), 8.03-7.85 (m, 7H), 7.51 (d, J=8.5 Hz, 1H), 6.89 (s, 1H), 6.75 (d. J=7.0 Hz, 1H), 4.80 (d, J=6.0 Hz, 2H), 3.99-3.95 (m, 1H), 3.30-3.23 (m, 1H), 3.16-3.10 (m, 1H), 2.08-2.03 (m, 1H), 1.99-1.96 (m, 1H), 1.91-1.85 (m, 1H), 1.74-1.70 (m, 1H); ESI MS m/z 439 [M+H]+; HPLC (Method B) 98.7% (AUC), tR=15.5 min; [α]23D +20.5° (c 0.13, Methanol). extracted with dichloromethane (2×30 mL) The combined organic extracts were washed with brine (20 mL) dried (Na2SO4) concentrated under reduced pressure To the desired regioisomer (100 mg, 0.18 mmol) was added dichloromethane (10 mL) and trifluoroacetic acid (2 mL) After stirring at ambient temperature for 2 h The organic layer was washed with brine (10 mL) dried (Na2SO4) concentrated under reduced pressure The mixture was concentrated under reduced pressure triturated with dichloromethane/hexanes the obtained solid was triturated with diethyl ether The solid was dried

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

Procedure: To a solution of N-bromosuccinimide (1.33 g, 7.45 mmol, 3 eq) in DCM (15 ml) was added drop wise a solution of triphenylphosphine (1.82 g, 6.94 mmol, 2.8 eq) in DCM (15 ml). The solution was stirred at room temperature for 15 minutes. Pyridine (0.015 ml, 1.2 eq) was added followed by dropwise addition of (R)-2-hydroxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (0.50 g, 2.48 mmol, 1 eq) in DCM (15 ml). The solution was stirred overnight at room temperature. The solvent was removed under reduced pressure. The residue was triturated in diethyl ether (2×5 0 ml) and 10% ethyl acetate in heptane. The solvents from trituration were combined and concentrated under reduced pressure to give a pale pink solid. The product was purified using column chromatography eluting with ethyl acetate/heptane to give the title compound (0.20 g, 30% yield). The solution was stirred overnight at room temperature The solvent was removed under reduced pressure The residue was triturated in diethyl ether (2×5 0 ml) concentrated under reduced pressure to give a pale pink solid The product was purified eluting with ethyl acetate/heptane

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-tert-butyl-2-(bromomethyl)pyrrolidine-1-carboxylate (0.45 g, 1.7 mmol) in DMSO (1.5 mL) was added to a solution of 4-(benzyloxy)-1-(9-methyl-2,3,4,9,-tetrahydro-1H-pyrido[3,4-b]indol-7-yl)pyridine-2(1H)-one (0.33 g, 0.85 mmol), and Cs2CO3 (1.10 g, 3.4 mmol) in DMSO (2.8 mL), and the resulting solution was heated at 60° C. for 18 h. The reaction mixture was diluted with H2O and extracted with CH2Cl2 (3×25 mL). The combined organic extracts were washed with brine (2×25 mL), dried over Na2SO4 and concentrated to dryness under reduced pressure. Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film. The film was diluted with EtOAc and washed with brine (4×10 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to provide the title compound (19 mg, 3%) as a clear film: ESI MS m/z 569 [M+H]+. extracted with CH2Cl2 (3×25 mL) The combined organic extracts were washed with brine (2×25 mL) dried over Na2SO4 concentrated to dryness under reduced pressure Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film washed with brine (4×10 mL) dried over Na2SO4 filtered concentrated under reduced pressure

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-tert-butyl-2-(bromomethyl)pyrrolidine-1-carboxylate (0.45 g, 1.7 mmol) in DMSO (1.5 mL) was added to a solution of 4-(benzyloxy)-1-(9-methyl-2,3,4,9,-tetrahydro-1H-pyrido[3,4-b]indol-7-yl)pyridine-2(1H)-one (0.33 g, 0.85 mmol), and Cs2CO3 (1.10 g, 3.4 mmol) in DMSO (2.8 mL), and the resulting solution was heated at 60° C. for 18 h. The reaction mixture was diluted with H2O and extracted with CH2Cl2 (3×25 mL). The combined organic extracts were washed with brine (2×25 mL), dried over Na2SO4 and concentrated to dryness under reduced pressure. Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film. The film was diluted with EtOAc and washed with brine (4×10 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to provide the title compound (19 mg, 3%) as a clear film: ESI MS m/z 569 [M+H]+. extracted with CH2Cl2 (3×25 mL) The combined organic extracts were washed with brine (2×25 mL) dried over Na2SO4 concentrated to dryness under reduced pressure Purification by flash column chromatography (40 g ISCO column, CH2Cl2/(80:18:2 CH2Cl2/MeOH/NH4OH), 100:0 hold 5 column volumes, increased to 0:100:0 over 20 column volumes) provided a clear film washed with brine (4×10 mL) dried over Na2SO4 filtered concentrated under reduced pressure