(2R,3R)-2-aminobutane-1,3-diol

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

Procedure: A 25 mL round-bottomed flask was charged with 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (100 mg, 0.226 mmol), (2R,3R)-2-aminobutane-1,3-diol (25 mg, 0.24 mmol), and HATU (90 mg, 0.24 mmol). Then added acetonitrile (2 mL) followed by N,N-diisopropylethylamine (0.10 mL, 0.57 mmol). The reaction mixture was stirred at room temperature overnight then quenched with water. The mixture was extracted with ethyl acetate (3×). The organic layers were combined, dried over Na2SO4, and concentrated. The residue was purified by trituration with 1:1 heptane/dichloromethane to afford 115 mg (96%) of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((1R,2R)-2-hydroxy-1-hydroxymethyl-propyl)-amide as a white solid. MS: [M+H]+=529. then quenched with water The mixture was extracted with ethyl acetate (3×) dried over Na2SO4 concentrated The residue was purified by trituration with 1:1 heptane/dichloromethane

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

Procedure: A 25 mL round-bottomed flask was charged with 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (100 mg, 0.226 mmol), (2R,3R)-2-aminobutane-1,3-diol (25 mg, 0.24 mmol), and HATU (90 mg, 0.24 mmol). Then added acetonitrile (2 mL) followed by N,N-diisopropylethylamine (0.10 mL, 0.57 mmol). The reaction mixture was stirred at room temperature overnight then quenched with water. The mixture was extracted with ethyl acetate (3×). The organic layers were combined, dried over Na2SO4, and concentrated. The residue was purified by trituration with 1:1 heptane/dichloromethane to afford 115 mg (96%) of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((1R,2R)-2-hydroxy-1-hydroxymethyl-propyl)-amide as a white solid. MS: [M+H]+=529. then quenched with water The mixture was extracted with ethyl acetate (3×) dried over Na2SO4 concentrated The residue was purified by trituration with 1:1 heptane/dichloromethane

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

Procedure: 5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxylic acid (2.05 g, 4.58 mmol) synthesized in Example (106c) was dissolved in methanol (20 mL), and commercially available L-threoninol (1.50 g, 14.27 mmol) and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (2.85 g, 10.30 mmol) were added, followed by stirring at room temperature for 3 days under nitrogen atmosphere. After the solvent was distilled off under reduced pressure, a saturated aqueous ammonium chloride solution (50 mL) was added, and extraction was carried out with methylene chloride (80 mL). The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=3%-7%) to afford the desired compound (2.10 g, yield 86%) as a white foam. After the solvent was distilled off under reduced pressure a saturated aqueous ammonium chloride solution (50 mL) was added extraction The organic layer was washed with saturated brine subsequently dried over anhydrous magnesium sulfate The resulting residue was purified silica gel column chromatography (elution solvent: methanol/methylene chloride=3%-7%)

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

Procedure: 5-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{[6-(methylsulfonyl)pyridin-3-yl]oxy}phenyl)-1H-pyrrole-2-carboxylic acid (1.20 g, 2.69 mmol) synthesized in Example (78k) and commercially available L-threoninol (0.57 g, 5.38 mmol) were dissolved in methanol (25 mL), and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (1.70 g, 5.38 mmol) was added at room temperature, followed by stirring for 3.5 hours under nitrogen atmosphere. The solvent was distilled off under reduced pressure, and the resulting residue was diluted with ethyl acetate (100 mL). After washing with 1N hydrochloric acid, a saturated aqueous sodium hydrogencarbonate solution and saturated brine, drying was carried out over anhydrous magnesium sulfate, the solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-6%) to afford the desired compound (883 mg, 62%) as a white solid. The solvent was distilled off under reduced pressure the resulting residue was diluted with ethyl acetate (100 mL) After washing with 1N hydrochloric acid a saturated aqueous sodium hydrogencarbonate solution and saturated brine, drying the solvent was distilled off under reduced pressure the resulting residue was purified silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-6%)

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

Procedure: A 25 mL round-bottomed flask was charged with 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (100 mg, 0.226 mmol), (2R,3R)-2-aminobutane-1,3-diol (25 mg, 0.24 mmol), and HATU (90 mg, 0.24 mmol). Then added acetonitrile (2 mL) followed by N,N-diisopropylethylamine (0.10 mL, 0.57 mmol). The reaction mixture was stirred at room temperature overnight then quenched with water. The mixture was extracted with ethyl acetate (3×). The organic layers were combined, dried over Na2SO4, and concentrated. The residue was purified by trituration with 1:1 heptane/dichloromethane to afford 115 mg (96%) of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((1R,2R)-2-hydroxy-1-hydroxymethyl-propyl)-amide as a white solid. MS: [M+H]+=529. then quenched with water The mixture was extracted with ethyl acetate (3×) dried over Na2SO4 concentrated The residue was purified by trituration with 1:1 heptane/dichloromethane

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

Procedure: According to the same conditions resulting in the preparation of the compound 2, the compound 12 is prepared from IIa.2 by oxidation reaction of the sulfur atom and then introduction of L-threoninol. Yield=43%. Oil. 1H NMR (300 MHz, CDCl3): δ 8.69 (d, 1H, J=4.7 Hz, Harom), 7.97 (d, 2H, J=8.3 Hz, Harom), 7.78-7.69 (m, 2H, Harom), 7.63 (8, 1H, Harom), 7.45 (d, 2H, J=8.3 Hz, Harom), 7.26-7.21 (m, 1H, Harom), 6.75 (bs, 1H, NH), 5.63 (d, 1H, J=5.8 Hz, NH), 4.77 (d, 2H, J=6.0 Hz, CH2), 4.22-4.15 (m, 1H, CH), 3.97-3.84 (m, 3H, CH+CH2), 3.01 (hept, 1H, J=7.0 Hz, CH), 1.29 (d, 3H, J=6.2 Hz, CH3), 1.28 (d, 6H, J=7.0 Hz, 2 CH3). MS (ESI): m/z 448 (MH+).

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

Procedure: According to the same conditions resulting in the preparation of the compound 2, the compound 12 is prepared from IIa.2 by oxidation reaction of the sulfur atom and then introduction of L-threoninol. Yield=43%. Oil. 1H NMR (300 MHz, CDCl3): δ 8.69 (d, 1H, J=4.7 Hz, Harom), 7.97 (d, 2H, J=8.3 Hz, Harom), 7.78-7.69 (m, 2H, Harom), 7.63 (8, 1H, Harom), 7.45 (d, 2H, J=8.3 Hz, Harom), 7.26-7.21 (m, 1H, Harom), 6.75 (bs, 1H, NH), 5.63 (d, 1H, J=5.8 Hz, NH), 4.77 (d, 2H, J=6.0 Hz, CH2), 4.22-4.15 (m, 1H, CH), 3.97-3.84 (m, 3H, CH+CH2), 3.01 (hept, 1H, J=7.0 Hz, CH), 1.29 (d, 3H, J=6.2 Hz, CH3), 1.28 (d, 6H, J=7.0 Hz, 2 CH3). MS (ESI): m/z 448 (MH+).

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

Procedure: 5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxylic acid (2.05 g, 4.58 mmol) synthesized in Example (106c) was dissolved in methanol (20 mL), and commercially available L-threoninol (1.50 g, 14.27 mmol) and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (2.85 g, 10.30 mmol) were added, followed by stirring at room temperature for 3 days under nitrogen atmosphere. After the solvent was distilled off under reduced pressure, a saturated aqueous ammonium chloride solution (50 mL) was added, and extraction was carried out with methylene chloride (80 mL). The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=3%-7%) to afford the desired compound (2.10 g, yield 86%) as a white foam. After the solvent was distilled off under reduced pressure a saturated aqueous ammonium chloride solution (50 mL) was added extraction The organic layer was washed with saturated brine subsequently dried over anhydrous magnesium sulfate The resulting residue was purified silica gel column chromatography (elution solvent: methanol/methylene chloride=3%-7%)

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

Procedure: 5-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{[6-(methylsulfonyl)pyridin-3-yl]oxy}phenyl)-1H-pyrrole-2-carboxylic acid (1.20 g, 2.69 mmol) synthesized in Example (78k) and commercially available L-threoninol (0.57 g, 5.38 mmol) were dissolved in methanol (25 mL), and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (1.70 g, 5.38 mmol) was added at room temperature, followed by stirring for 3.5 hours under nitrogen atmosphere. The solvent was distilled off under reduced pressure, and the resulting residue was diluted with ethyl acetate (100 mL). After washing with 1N hydrochloric acid, a saturated aqueous sodium hydrogencarbonate solution and saturated brine, drying was carried out over anhydrous magnesium sulfate, the solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-6%) to afford the desired compound (883 mg, 62%) as a white solid. The solvent was distilled off under reduced pressure the resulting residue was diluted with ethyl acetate (100 mL) After washing with 1N hydrochloric acid a saturated aqueous sodium hydrogencarbonate solution and saturated brine, drying the solvent was distilled off under reduced pressure the resulting residue was purified silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-6%)

Conditions: temp:125.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 6-bromo-4-chloropyrrolo[1,2-b]pyridazine-3-carboxamide (686 mg, 2.5 mmol), (2R,3R)-2-aminobutane-1,3-diol (394 mg, 3.75 mmol) and diisopropylethylamine (0.873 mL, 5.00 mmol) in DMA (10 mL) was heated to 125° C. for 3 hr. After cooling to rt, the volatiles were removed under high vacuum to afford a red oil that was treated with ˜25 ml of water. A gummy solid formed and the mixture was stirred at rt overnight. A few crystals of pure title compound from a previous batch were added at the beginning of the stirring. The suspension was filtered and dried to afford a yellow solid that was washed with 25 ml of Et2O:EtOAc, 1:1. Drying afforded 6-bromo-4-(((2R,3R)-1,3-dihydroxybutan-2-yl)amino)pyrrolo[1,2-b]pyridazine-3-carboxamide (670 mg, 1.952 mmol, 78% yield) as a pale yellow solid. 1H NMR (400 MHz, CD3OD) δ 8.13 (s, 1H), 7.62 (d, J=1.8 Hz, 1H), 7.09 (d, J=1.5 Hz, 1H), 4.21 (dd, J=6.4, 2.6 Hz, 1H), 4.15-4.06 (m, 1H), 3.90-3.74 (m, 2H), 1.23 (d, J=6.4 Hz, 3H); (ES+) m/z: 343.1, 345.1 (M+H); LC retention time: 1.957 min (analytical HPLC Method P). After cooling to rt the volatiles were removed under high vacuum to afford a red oil that A gummy solid formed

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

Procedure: 5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxylic acid (2.05 g, 4.58 mmol) synthesized in Example (106c) was dissolved in methanol (20 mL), and commercially available L-threoninol (1.50 g, 14.27 mmol) and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (2.85 g, 10.30 mmol) were added, followed by stirring at room temperature for 3 days under nitrogen atmosphere. After the solvent was distilled off under reduced pressure, a saturated aqueous ammonium chloride solution (50 mL) was added, and extraction was carried out with methylene chloride (80 mL). The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=3%-7%) to afford the desired compound (2.10 g, yield 86%) as a white foam. After the solvent was distilled off under reduced pressure a saturated aqueous ammonium chloride solution (50 mL) was added extraction The organic layer was washed with saturated brine subsequently dried over anhydrous magnesium sulfate The resulting residue was purified silica gel column chromatography (elution solvent: methanol/methylene chloride=3%-7%)

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

Procedure: 5-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{[6-(methylsulfonyl)pyridin-3-yl]oxy}phenyl)-1H-pyrrole-2-carboxylic acid (1.20 g, 2.69 mmol) synthesized in Example (78k) and commercially available L-threoninol (0.57 g, 5.38 mmol) were dissolved in methanol (25 mL), and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride n hydrate (1.70 g, 5.38 mmol) was added at room temperature, followed by stirring for 3.5 hours under nitrogen atmosphere. The solvent was distilled off under reduced pressure, and the resulting residue was diluted with ethyl acetate (100 mL). After washing with 1N hydrochloric acid, a saturated aqueous sodium hydrogencarbonate solution and saturated brine, drying was carried out over anhydrous magnesium sulfate, the solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-6%) to afford the desired compound (883 mg, 62%) as a white solid. The solvent was distilled off under reduced pressure the resulting residue was diluted with ethyl acetate (100 mL) After washing with 1N hydrochloric acid a saturated aqueous sodium hydrogencarbonate solution and saturated brine, drying the solvent was distilled off under reduced pressure the resulting residue was purified silica gel column chromatography (elution solvent: methanol/methylene chloride=0%-6%)