(3S)-4-[(2-methylpropan-2-yl)oxycarbonyl]morpholine-3-carboxylic acid

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

Procedure: A solution of morpholine-3(S),4-dicarboxylic acid 4-tert-butyl ester (2.83 g, 12.7 mmol) in pyridine (106 ml) was stirred at RT. 6-chloro-9H-β-carbolin-8-ylamine (2.30 g, 10.6 mmol) was added, followed by EDCI (4.06 g, 21.2 mmol). The clear orange-to-brown solution was stirred at RT for 14 hr. The solution was diluted with H2O (120 ml) and poured into a separatory funnel containing EtOAc (200 ml), H2O (100 ml) and brine (100 ml). The mixture was shaken and the layers were separated. The aqueous layer was extracted with EtOAc (2×50 ml) and the combined organic layers were washed with brine. The organic layer was dried, filtered and concentrated to a reduced volume, then added drop-wise to a stirring solution of 1:1 Et2O/hexanes (500 ml). The precipitate which formed was filtered and washed with 1:1 Et2O/Hexanes. The filtrate was concentrated to a reduced volume and a second crop of precipitate was collected. The solid product was placed under high vacuum for 2 hr to yield 3(S)-(6-chloro-9H-β-carbolin-8-ylcarbamoyl)-morpholine-4-carboxylic acid tert-butyl ester as a pale yellow to pale brown solid (4.36 g). poured into a separatory funnel The mixture was shaken the layers were separated The aqueous layer was extracted with EtOAc (2×50 ml) the combined organic layers were washed with brine The organic layer was dried filtered concentrated to a reduced volume added drop-wise to a stirring solution of 1:1 Et2O/hexanes (500 ml) The precipitate which formed was filtered washed with 1:1 Et2O/Hexanes The filtrate was concentrated to a reduced volume a second crop of precipitate was collected The solid product was placed under high vacuum for 2 hr

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

Procedure: A solution of morpholine-3(S),4-dicarboxylic acid 4-tert-butyl ester (2.83 g, 12.7 mmol) in pyridine (106 ml) was stirred at RT. 6-chloro-9H-β-carbolin-8-ylamine (2.30 g, 10.6 mmol) was added, followed by EDCI (4.06 g, 21.2 mmol). The clear orange-to-brown solution was stirred at RT for 14 hr. The solution was diluted with H2O (120 ml) and poured into a separatory funnel containing EtOAc (200 ml), H2O (100 ml) and brine (100 ml). The mixture was shaken and the layers were separated. The aqueous layer was extracted with EtOAc (2×50 ml) and the combined organic layers were washed with brine. The organic layer was dried, filtered and concentrated to a reduced volume, then added drop-wise to a stirring solution of 1:1 Et2O/hexanes (500 ml). The precipitate which formed was filtered and washed with 1:1 Et2O/Hexanes. The filtrate was concentrated to a reduced volume and a second crop of precipitate was collected. The solid product was placed under high vacuum for 2 hr to yield 3(S)-(6-chloro-9H-β-carbolin-8-ylcarbamoyl)-morpholine-4-carboxylic acid tert-butyl ester as a pale yellow to pale brown solid (4.36 g). poured into a separatory funnel The mixture was shaken the layers were separated The aqueous layer was extracted with EtOAc (2×50 ml) the combined organic layers were washed with brine The organic layer was dried filtered concentrated to a reduced volume added drop-wise to a stirring solution of 1:1 Et2O/hexanes (500 ml) The precipitate which formed was filtered washed with 1:1 Et2O/Hexanes The filtrate was concentrated to a reduced volume a second crop of precipitate was collected The solid product was placed under high vacuum for 2 hr

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

Procedure: Trifluoroacetic acid (10 mL) was added to a solution of (S)-4-(tert-butoxycarbonyl) morpholine-3-carboxylic acid (5.00 g, 21.64 mmol) in CH2Cl2 (40 mL) dropwise at 0° C. and the reaction mixture was stirred at room temperature for 5 h. The reaction mixture was concentrated to dryness and the crude residue (2.80 g, 21.30 mmol) was dissolved in a mixture of dioxane (30 mL) and water (10 mL). The suspension was cooled to 0° C., FMOC-Cl (6.60 g, 25.60 mmol) and K2CO3 (11.60 g, 84.2 mmol) were added, and the mixture was stirred at room temperature for 3 h. The reaction mixture was concentrated, diluted with water (20 mL) and acidified with 1M aqueous HCl (30 mL) to pH 2-3. The resulting mixture was extracted with EtOAc (3×50 mL). The combined organic layers were washed with brine solution (50 mL), dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to afford the title compound (6.41 g) as colorless oil which was used in the next step without further purification. The reaction mixture was concentrated to dryness The suspension was cooled to 0° C. the mixture was stirred at room temperature for 3 h The reaction mixture was concentrated diluted with water (20 mL) The resulting mixture was extracted with EtOAc (3×50 mL) The combined organic layers were washed with brine solution (50 mL) dried over anhydrous Na2SO4 filtered concentrated under reduced pressure

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

Procedure: To a solution of compound 24A (930 mg, 3.0 mmol) and (S)-morpholine-3,4-dicarboxylic acid 4-tert-butyl ester (19A, 2.09 g, 9.0 mmol) in anhydrous dichloromethane (20 mL) was added N,N′-diisopropylcarbodiimide (DIPC, 1.4 mL, 9.0 mmol). The reaction mixture was stirred at rt overnight. Solvent was removed. To the residua were added THF (20 mL) and methanol (20 mL) and a solution of LiOH.H2O (1.0 g, 23.84 mmol) in water (10 mL). The mixture was stirred at rt for 2 h. It was then neutralized with acetic acid (1.36 mL, 23.84 mmol). The mixture was diluted with ethyl acetate (˜100 mL), washed with brine, and dried over sodium sulfate. It was filtered, concentrated and filtered again to remove diisopropylurea. The filtrate was purified with silica column chromatography eluting with dichloromethane/ethyl acetate (v/v 5/1, 3/1, 2/1, 1/1) to provide the title compound (28A, 1.12 g) as a yellowish solid in 71.3% yield. LCMS (ESI) m/z 587.15 (MNa+), 521.05 (MH+), 421.06; HPLC: tR=5.32 min. Solvent was removed To the residua were added THF (20 mL) and methanol (20 mL) The mixture was stirred at rt for 2 h washed with brine dried over sodium sulfate It was filtered concentrated filtered again to remove diisopropylurea The filtrate was purified with silica column chromatography eluting with dichloromethane/ethyl acetate (v/v 5/1, 3/1, 2/1, 1/1)

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

Procedure: Using the same procedure for the preparation of 16A, reaction of compound 2A with (S)-morpholine-3,4-dicarboxylic acid 4-tert-butyl ester (19A) afforded the title compound 20A as a white powder in similar yield. Its 1H NMR and LCMS data are identical with those of compound 16A.

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

Procedure: To a solution of O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium-hexafluorophosphate (77 mg, 0.124 mmol) in anhydrous N,N-dimethylformamide (1 mL) was added at room temperature (S)-4-Boc-morpholine-3-carboxylic acid (26.2 mg, 0.113 mmol), followed by N,N-diisopropylethylamine 0.059 mL, 0.339 mmol) and finally a solution of N-(1-{[3-(aminomethyl)phenyl]methyl}-4-hydroxy-1H-indazol-3-yl)-5-chloro-2-thiophenesulfonamide (formate salt) (for a preparation see intermediate 15) ((56 mg, 0.113 mmol) in anhydrous N,N-dimethylformamide (2 mL) and the reaction mixture was stirred at room temperature for 1 hour. The reaction mixture was partitioned between saturated aqueous sodium hydrogen carbonate solution and ethyl acetate. The organic layer was separated, washed with brine:water (1:1), passed through a hydrophobic frit and evaporated in-vacuo. The was treated with hydrogen chloride (4M solution in 1,4-dioxane) (1 mL) and then added methanol (˜4 mL) until the reaction was in solution. Reaction stirred at room temperature for 2 hours. The reaction mixture was evaporated in-vacuo and the residue was dissolved in MeOH/DMSO (1 mL) and purified by Mass Directed AutoPreparative HPLC (MDAP) on (Sunfire C18 column Method A) eluting with solvents A/B (A: 0.1% v/v solution of formic acid in water, B: 0.1% v/v solution of formic acid in acetonitrile) using a method B over 25 min. Appropriate fractions were combined and evaporated in-vacuo to yield the title compound as a colourless oil (13 mg, 19%). LCMS (System B) RT=1.63 min, ES+ve m/z 562/564 (M+H)+. The reaction mixture was partitioned between saturated aqueous sodium hydrogen carbonate solution and ethyl acetate The organic layer was separated washed with brine:water (1:1) evaporated in-vacuo The was treated with hydrogen chloride (4M solution in 1,4-dioxane) (1 mL) Reaction stirred at room temperature for 2 hours The reaction mixture was evaporated in-vacuo the residue was dissolved in MeOH/DMSO (1 mL) purified by Mass Directed AutoPreparative HPLC (MDAP) on (Sunfire C18 column Method A) eluting with solvents A/B (A: 0.1% v/v solution of formic acid in water, B over 25 min evaporated in-vacuo

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

Procedure: N-[1-{[3-(Aminomethyl)phenyl]methyl}-5-fluoro-4-(methyloxy)-1H-indazol-3-yl]-5-chloro-2-thiophenesulfonamide (for a preparation see Intermediate 61) (100 mg, 0.208 mmol) was suspended in DCM (1 mL), (3S)-4-{[(1,1-dimethylethyl)oxy]carbonyl}-3-morpholinecarboxylic acid (52.9 mg, 0.229 mmol) and HATU (87 mg, 0.229 mmol) were added to the reaction mixture and stirred for 5 min. DIPEA (0.109 mL, 0.624 mmol) was added to the reaction mixture and stirred over the weekend. LCMS showed the coupling had gone to completion. Trifluoroacetic acid (0.25 mL, 3.24 mmol) was added to the reaction and left to stir for 1 h and 50 min. LCMS showed the reaction had gone to completion so the mixture was concentrated under a stream of nitrogen. The sample was dissolved in 1:1 MeOH-DMSO (1 mL) and purified by Mass Directed AutoPrep on Sunfire C18 column using Acetonitrile Water with a TFA modifier (Method B). The solvent was evaporated in vacuo to give the required product (as TFA salts). The residue was dissolved in methanol and loaded onto a methanol pre-conditioned SCX-2 ion-exchange cartridge (10 g). The cartridge was washed well with methanol, followed by 2M ammonia in methanol. Evaporation of the solvent from the ammoniacal fractions gave the title compound as a colourless glassy solid (71 mg, 57%). LCMS (System A) RT=0.82 min, ES+ve m/z 594/596 (M+H)+. stirred over the weekend left to stir for 1 h and 50 min was concentrated under a stream of nitrogen The sample was dissolved in 1:1 MeOH-DMSO (1 mL) purified by Mass Directed AutoPrep on Sunfire C18 column The solvent was evaporated in vacuo

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

Procedure: To a solution of O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium-hexafluorophosphate (77 mg, 0.124 mmol) in anhydrous N,N-dimethylformamide (1 mL) was added at room temperature (S)-4-Boc-morpholine-3-carboxylic acid (26.2 mg, 0.113 mmol), followed by N,N-diisopropylethylamine 0.059 mL, 0.339 mmol) and finally a solution of N-(1-{[3-(aminomethyl)phenyl]methyl}-4-hydroxy-1H-indazol-3-yl)-5-chloro-2-thiophenesulfonamide (formate salt) (for a preparation see intermediate 15) ((56 mg, 0.113 mmol) in anhydrous N,N-dimethylformamide (2 mL) and the reaction mixture was stirred at room temperature for 1 hour. The reaction mixture was partitioned between saturated aqueous sodium hydrogen carbonate solution and ethyl acetate. The organic layer was separated, washed with brine:water (1:1), passed through a hydrophobic frit and evaporated in-vacuo. The was treated with hydrogen chloride (4M solution in 1,4-dioxane) (1 mL) and then added methanol (˜4 mL) until the reaction was in solution. Reaction stirred at room temperature for 2 hours. The reaction mixture was evaporated in-vacuo and the residue was dissolved in MeOH/DMSO (1 mL) and purified by Mass Directed AutoPreparative HPLC (MDAP) on (Sunfire C18 column Method A) eluting with solvents A/B (A: 0.1% v/v solution of formic acid in water, B: 0.1% v/v solution of formic acid in acetonitrile) using a method B over 25 min. Appropriate fractions were combined and evaporated in-vacuo to yield the title compound as a colourless oil (13 mg, 19%). LCMS (System B) RT=1.63 min, ES+ve m/z 562/564 (M+H)+. The reaction mixture was partitioned between saturated aqueous sodium hydrogen carbonate solution and ethyl acetate The organic layer was separated washed with brine:water (1:1) evaporated in-vacuo The was treated with hydrogen chloride (4M solution in 1,4-dioxane) (1 mL) Reaction stirred at room temperature for 2 hours The reaction mixture was evaporated in-vacuo the residue was dissolved in MeOH/DMSO (1 mL) purified by Mass Directed AutoPreparative HPLC (MDAP) on (Sunfire C18 column Method A) eluting with solvents A/B (A: 0.1% v/v solution of formic acid in water, B over 25 min evaporated in-vacuo

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

Procedure: N-[1-{[3-(Aminomethyl)phenyl]methyl}-5-fluoro-4-(methyloxy)-1H-indazol-3-yl]-5-chloro-2-thiophenesulfonamide (for a preparation see Intermediate 61) (100 mg, 0.208 mmol) was suspended in DCM (1 mL), (3S)-4-{[(1,1-dimethylethyl)oxy]carbonyl}-3-morpholinecarboxylic acid (52.9 mg, 0.229 mmol) and HATU (87 mg, 0.229 mmol) were added to the reaction mixture and stirred for 5 min. DIPEA (0.109 mL, 0.624 mmol) was added to the reaction mixture and stirred over the weekend. LCMS showed the coupling had gone to completion. Trifluoroacetic acid (0.25 mL, 3.24 mmol) was added to the reaction and left to stir for 1 h and 50 min. LCMS showed the reaction had gone to completion so the mixture was concentrated under a stream of nitrogen. The sample was dissolved in 1:1 MeOH-DMSO (1 mL) and purified by Mass Directed AutoPrep on Sunfire C18 column using Acetonitrile Water with a TFA modifier (Method B). The solvent was evaporated in vacuo to give the required product (as TFA salts). The residue was dissolved in methanol and loaded onto a methanol pre-conditioned SCX-2 ion-exchange cartridge (10 g). The cartridge was washed well with methanol, followed by 2M ammonia in methanol. Evaporation of the solvent from the ammoniacal fractions gave the title compound as a colourless glassy solid (71 mg, 57%). LCMS (System A) RT=0.82 min, ES+ve m/z 594/596 (M+H)+. stirred over the weekend left to stir for 1 h and 50 min was concentrated under a stream of nitrogen The sample was dissolved in 1:1 MeOH-DMSO (1 mL) purified by Mass Directed AutoPrep on Sunfire C18 column The solvent was evaporated in vacuo

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

Procedure: To a solution of O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium-hexafluorophosphate (77 mg, 0.124 mmol) in anhydrous N,N-dimethylformamide (1 mL) was added at room temperature (S)-4-Boc-morpholine-3-carboxylic acid (26.2 mg, 0.113 mmol), followed by N,N-diisopropylethylamine 0.059 mL, 0.339 mmol) and finally a solution of N-(1-{[3-(aminomethyl)phenyl]methyl}-4-hydroxy-1H-indazol-3-yl)-5-chloro-2-thiophenesulfonamide (formate salt) (for a preparation see intermediate 15) ((56 mg, 0.113 mmol) in anhydrous N,N-dimethylformamide (2 mL) and the reaction mixture was stirred at room temperature for 1 hour. The reaction mixture was partitioned between saturated aqueous sodium hydrogen carbonate solution and ethyl acetate. The organic layer was separated, washed with brine:water (1:1), passed through a hydrophobic frit and evaporated in-vacuo. The was treated with hydrogen chloride (4M solution in 1,4-dioxane) (1 mL) and then added methanol (˜4 mL) until the reaction was in solution. Reaction stirred at room temperature for 2 hours. The reaction mixture was evaporated in-vacuo and the residue was dissolved in MeOH/DMSO (1 mL) and purified by Mass Directed AutoPreparative HPLC (MDAP) on (Sunfire C18 column Method A) eluting with solvents A/B (A: 0.1% v/v solution of formic acid in water, B: 0.1% v/v solution of formic acid in acetonitrile) using a method B over 25 min. Appropriate fractions were combined and evaporated in-vacuo to yield the title compound as a colourless oil (13 mg, 19%). LCMS (System B) RT=1.63 min, ES+ve m/z 562/564 (M+H)+. The reaction mixture was partitioned between saturated aqueous sodium hydrogen carbonate solution and ethyl acetate The organic layer was separated washed with brine:water (1:1) evaporated in-vacuo The was treated with hydrogen chloride (4M solution in 1,4-dioxane) (1 mL) Reaction stirred at room temperature for 2 hours The reaction mixture was evaporated in-vacuo the residue was dissolved in MeOH/DMSO (1 mL) purified by Mass Directed AutoPreparative HPLC (MDAP) on (Sunfire C18 column Method A) eluting with solvents A/B (A: 0.1% v/v solution of formic acid in water, B over 25 min evaporated in-vacuo

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

Procedure: N-[1-{[3-(Aminomethyl)phenyl]methyl}-5-fluoro-4-(methyloxy)-1H-indazol-3-yl]-5-chloro-2-thiophenesulfonamide (for a preparation see Intermediate 61) (100 mg, 0.208 mmol) was suspended in DCM (1 mL), (3S)-4-{[(1,1-dimethylethyl)oxy]carbonyl}-3-morpholinecarboxylic acid (52.9 mg, 0.229 mmol) and HATU (87 mg, 0.229 mmol) were added to the reaction mixture and stirred for 5 min. DIPEA (0.109 mL, 0.624 mmol) was added to the reaction mixture and stirred over the weekend. LCMS showed the coupling had gone to completion. Trifluoroacetic acid (0.25 mL, 3.24 mmol) was added to the reaction and left to stir for 1 h and 50 min. LCMS showed the reaction had gone to completion so the mixture was concentrated under a stream of nitrogen. The sample was dissolved in 1:1 MeOH-DMSO (1 mL) and purified by Mass Directed AutoPrep on Sunfire C18 column using Acetonitrile Water with a TFA modifier (Method B). The solvent was evaporated in vacuo to give the required product (as TFA salts). The residue was dissolved in methanol and loaded onto a methanol pre-conditioned SCX-2 ion-exchange cartridge cartridge (10 g). The cartridge was washed well with methanol, followed by 2M ammonia in methanol. Evaporation of the solvent from the ammoniacal fractions gave the title compound as a colourless glassy solid (71 mg, 57%). LCMS (System A) RT=0.82 min, ES+ve m/z 594/596 (M+H)+. stirred over the weekend left to stir for 1 h and 50 min was concentrated under a stream of nitrogen The sample was dissolved in 1:1 MeOH-DMSO (1 mL) purified by Mass Directed AutoPrep on Sunfire C18 column The solvent was evaporated in vacuo

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

Procedure: A solution of morpholine-3(S),4-dicarboxylic acid 4-tert-butyl ester (2.83 g, 12.7 mmol) in pyridine (106 ml) was stirred at RT. 6-chloro-9H-β-carbolin-8-ylamine (2.30 g, 10.6 mmol) was added, followed by EDCI (4.06 g, 21.2 mmol). The clear orange-to-brown solution was stirred at RT for 14 hr. The solution was diluted with H2O (120 ml) and poured into a separatory funnel containing EtOAc (200 ml), H2O (100 ml) and brine (100 ml). The mixture was shaken and the layers were separated. The aqueous layer was extracted with EtOAc (2×50 ml) and the combined organic layers were washed with brine. The organic layer was dried, filtered and concentrated to a reduced volume, then added drop-wise to a stirring solution of 1:1 Et2O/hexanes (500 ml). The precipitate which formed was filtered and washed with 1:1 Et2O/Hexanes. The filtrate was concentrated to a reduced volume and a second crop of precipitate was collected. The solid product was placed under high vacuum for 2 hr to yield 3(S)-(6-chloro-9H-β-carbolin-8-ylcarbamoyl)-morpholine-4-carboxylic acid tert-butyl ester as a pale yellow to pale brown solid (4.36 g). poured into a separatory funnel The mixture was shaken the layers were separated The aqueous layer was extracted with EtOAc (2×50 ml) the combined organic layers were washed with brine The organic layer was dried filtered concentrated to a reduced volume added drop-wise to a stirring solution of 1:1 Et2O/hexanes (500 ml) The precipitate which formed was filtered washed with 1:1 Et2O/Hexanes The filtrate was concentrated to a reduced volume a second crop of precipitate was collected The solid product was placed under high vacuum for 2 hr