(2R)-butan-2-ol

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

Procedure: (2R)-2-Butanol (0.99 g, 0.013 mol) was dissolved in DMF (50 ml) and the solution cooled to 0° C. To this was added sodium hydride, 60% dispersion in mineral oil (1.54 g, 0.036 mol) in a portion-wise manner, the mixture was stirred at 0° C. for 10 minutes after complete addition. 2-Fluoro-5-formylbenzonitrile (2.0 g, 0.013 mol) was then added and the reaction mixture allowed to warm to room temperature (slowly within the ice bath) and the reaction mixture was stirred overnight at room temperature. The reaction mixture was then cooled to 0° C., quenched with brine and diluted with EtOAc (˜25 ml). The mixture was partitioned and the organic fraction extracted with water (˜30 ml), the combined organics were dried by passing through a phase separating cartridge and evaporated to dryness under reduced pressure to give the crude product. The crude residue was purified on a 40+M Biotage cartridge, eluting with a 20 to 50% mixture of EtOAc in hexane. This gave the title compound (310 mg) as a yellow oil. δH (d6-DMSO, 400 MHz): 9.88 (1H, s), 8.30 (1H, s), 8.15 (1H, d), 7.49 (1H, d), 4.73-4.81 (1H, m), 1.63-1.79 (2H, m), 1.33 (3H, d), 0.95 (3H, t) ppm. after complete addition was stirred overnight at room temperature The reaction mixture was then cooled to 0° C. quenched with brine diluted with EtOAc (˜25 ml) The mixture was partitioned the organic fraction extracted with water (˜30 ml) the combined organics were dried separating cartridge evaporated to dryness under reduced pressure to give the crude product The crude residue was purified on a 40+M Biotage cartridge eluting with a 20 to 50% mixture of EtOAc in hexane

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

Procedure: A solution of methanesulphonic anhydride (8.33 g, 47.8 mmol) in dichloromethane (30 ml) was added dropwise over 30 minutes to an ice-cooled solution of (R)-2-butanol (4.0 ml, 43.5 mmol) and triethylamine (6.65 ml, 47.8 mmol) in dichloromethane (70 ml). The reaction was then allowed to warm to room temperature and stirred for 18 hours. The mixture was then washed with water, 2N hydrochloric acid, then dried (Na2SO4) and evaporated under reduced pressure to give the title compound as a pale yellow oil, 7.0 g. The mixture was then washed with water, 2N hydrochloric acid dried (Na2SO4) evaporated under reduced pressure

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound of Example 78 (400 mg, 0.84 mmol) was added to a mixture of potassium bis(trimethylsilyl)amide (840 mg, 4.2 mmol) in (R)-2-butanol (4 ml) and the mixture stirred at 110° C. for 18 hours. The cooled mixture was concentrated under reduced pressure and the residue suspended in water (10 ml) and neutralised using 2N hydrochloric acid. This aqueous suspension was extracted with ethyl acetate (3×30 ml), the combined organic extracts washed with sodium hydroxide solution (20 ml), brine (2×30 ml), dried (Na2SO4) and evaporated under reduced pressure. The crude product was purified by is column chromatography on silica gel, using an elution gradient of dichloromethane: methanol (100:0 to 97.5:2.5) and the product suspended in ether and evaporated under reduced pressure. This solid was recrystallised from hexane/ethyl acetate to afford the title compound (72 mg, 17%) as a white solid. [α]D=−20.88° (c=0.083, dichloromethane) Found: C, 54.65; H, 6.63; N, 19.25. C23H33N7O4S;0.5H2O requires C, 53.89; H, 6.69; N, 19.13% δ (CDCl3): 1.06 (6H, m), 1.40 (3H, t), 1.50 (3H, d), 1.86 (1H, m), 1.99 (1H, m), 2.42 (2H, q), 2.58 (4H, m), 3.04 (2H, q), 3.16 (4H, m), 4.09 (3H, s), 5.56 (1H, m), 8.62 (1H, s), 9.05 (1H, s), 10.70 (1H, s). LRMS: m/z 504 (M+1)+ The cooled mixture was concentrated under reduced pressure This aqueous suspension was extracted with ethyl acetate (3×30 ml) the combined organic extracts washed with sodium hydroxide solution (20 ml), brine (2×30 ml) dried (Na2SO4) evaporated under reduced pressure The crude product was purified evaporated under reduced pressure This solid was recrystallised from hexane/ethyl acetate

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

Procedure: A solution of DIAD (16.6 mL, 84.0 mmol) in dry THF (100 mL) was added dropwise to a cooled (ice bath) stirred mixture of methyl 3-hydroxy-5-{[phenylmethyl]oxy}benzoate (14.5 g, 56.2 mmol); R-(−)-sec-butanol (5 g, 67.0 mmol) and solid-supported triphenylphosphine (28 g, of 3 mmol per g loading, 84.0 mmol) in dry THF (400 mL) whilst maintaining the temperature below 10° C. The mixture was allowed to stir for 3 hours, then diluted with diethyl ether (800 mL) and filtered. Removal of the solvent gave a pale coloured oil, which was purified by column chromatography on silica, eluting with 25% ethyl acetate in hexane; to give the desired product (14.87 g). a cooled (ice bath) to stir for 3 hours filtered Removal of the solvent gave a pale coloured oil, which was purified by column chromatography on silica eluting with 25% ethyl acetate in hexane

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

Procedure: A solution of DIAD (16.6 mL, 84.0 mmol) in dry THF (100 mL) was added dropwise to a cooled (ice bath) stirred mixture of methyl 3-hydroxy-5-{[phenylmethyl]oxy}benzoate (14.5 g, 56.2 mmol); R-(−)-sec-butanol (5 g, 67.0 mmol) and solid-supported triphenylphosphine (28 g, of 3 mmol per g loading, 84.0 mmol) in dry THF (400 mL) whilst maintaining the temperature below 10° C. The mixture was allowed to stir for 3 hours, then diluted with diethyl ether (800 mL) and filtered. Removal of the solvent gave a pale coloured oil, which was purified by column chromatography on silica, eluting with 25% ethyl acetate in hexane; to give the desired product (14.87 g). a cooled (ice bath) to stir for 3 hours filtered Removal of the solvent gave a pale coloured oil, which was purified by column chromatography on silica eluting with 25% ethyl acetate in hexane

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound of Example 78 (400 mg, 0.84 mmol) was added to a mixture of potassium bis(trimethylsilyl)amide (840 mg, 4.2 mmol) in (R)-2-butanol (4 ml) and the mixture stirred at 110° C. for 18 hours. The cooled mixture was concentrated under reduced pressure and the residue suspended in water (10 ml) and neutralised using 2N hydrochloric acid. This aqueous suspension was extracted with ethyl acetate (3×30 ml), the combined organic extracts washed with sodium hydroxide solution (20 ml), brine (2×30 ml), dried (Na2SO4) and evaporated under reduced pressure. The crude product was purified by column chromatography on silica gel, using an elution gradient of dichloromethane:methanol (100:0 to 97.5:2.5) and the product suspended in ether and evaporated under reduced pressure. This solid was recrystallised from hexane/ethyl acetate to afford the title compound (72 mg, 17%) as a white solid. The cooled mixture was concentrated under reduced pressure This aqueous suspension was extracted with ethyl acetate (3×30 ml) the combined organic extracts washed with sodium hydroxide solution (20 ml), brine (2×30 ml) dried (Na2SO4) evaporated under reduced pressure The crude product was purified by column chromatography on silica gel evaporated under reduced pressure This solid was recrystallised from hexane/ethyl acetate

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

Procedure: An ice cold solution of (R)-2-butanol (888 mg) in DCM (15 ml) was treated with Et3N (1.26 ml) and followed by dropwise addition of methanesulfonyl chloride (0.52 ml). After 1 h the solution was washed with saturated sodium hydrogen carbonate solution (5 ml), water (2×5 ml), brine (5 ml), dried (MgSO4) and evaporated to give the title compound (D33)(0.9 g). 1H NMR δ (CDCl3): 4.74 (1H, m), 3.00 (3H, s), 1.67 (2H, m), 1.41 (1H, d, J=6.5 Hz), 0.99 (3H, t, J=7.5 Hz). After 1 h the solution was washed with saturated sodium hydrogen carbonate solution (5 ml), water (2×5 ml), brine (5 ml) dried (MgSO4) evaporated

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

Procedure: A mixture of 1-[8-methoxy-5-(1-oxo-3H-isobenzofuran-5-yl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]cyclopropanecarboxylic acid (400 mg, 1.095 mmol), (2R)-butan-2-ol (122 mg, 1.64 mmol), DMAP (147 mg, 1.20 mmol) and EDCI.HCl (231 mg, 1.20 mmol) in DCM (10 mL) was stirred at RT overnight before it was evaporated to dryness. Column chromatography (gradient MeOH 0 to 5% in DCM) followed by recrystallization in EtOH and freeze drying afforded the title compound as colorless powder (138 mg, 30%). HPLC-Retention time (XE Metode 7 CM): 2.33 minutes. Detected “M+1”-mass: 422.15. Calculated “M+1”-mass: 422.17. 1H NMR (DMSO, 400 MHz): δ=8.23 (br s, 1H), 8.14 (dd, 1H, J=8.0, 1.6 Hz), 7.99 (d, 1H, J=8.0 Hz), 7.41 (d, 1H, J=8.2 Hz), 7.24 (d, 1H, J=8.2 Hz), 5.51 (s, 2H), 4.78 (h, 1H, J=6.3 Hz), 4.04 (s, 3H), 1.62-1.38 (m, 6H), 1.13 (d, 3H, J=6.3 Hz), 0.78 (t, 3H, J=7.4 Hz) ppm. was evaporated to dryness Column chromatography (gradient MeOH 0 to 5% in DCM) followed by recrystallization in EtOH freeze drying

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

Procedure: (R)-Butan-2-ol (0.5 ml) was deprotonated analogously to W1.056 with sodium hydride (85 mg) and reacted with 6-chloro-7,8-dimethyl-[1,2,4]triazolo[4,3-b]pyridazin-3-ylamine (W2.006a, 100 mg), suspended in DMF (2 ml), and worked up. 75 mg of the title compound were isolated in sufficient purity.

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

Procedure: (R)-Butan-2-ol (0.5 ml) was deprotonated analogously to W1.056 with sodium hydride (85 mg) and reacted with 6-chloro-7,8-dimethyl-[1,2,4]triazolo[4,3-b]pyridazin-3-ylamine (W2.006a, 100 mg), suspended in DMF (2 ml), and worked up. 75 mg of the title compound were isolated in sufficient purity.

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

Procedure: A mixture of 8.2 g of (R)-(-)2-butanol, 31.5 g of 1-bromo-4-benzenesulfonyl chloride, 1.0 g of N,N-dimethyl-4-pyridinamine, 55.5 ml of pyridine and 293 ml of dichloromethane was stirred for 3 days at room temperature. After the addition of water, stirring was continued for 1 hour. The reaction mixture was washed twice with a diluted hydrochloric acid solution and once with water, dried, filtered and evaporated in vacuo. The residue was purified by column chromatography over silica gel using trichloromethane as eluent. The pure fractions were collected and the eluent was evaporated, yielding 11.5 g (35.6%) of (R)-2-butanol 4-bromobenzenesulfonate (ester) (interm. 3). stirring was continued for 1 hour The reaction mixture was washed twice with a diluted hydrochloric acid solution and once with water dried filtered evaporated in vacuo The residue was purified by column chromatography over silica gel The pure fractions were collected the eluent was evaporated

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

Procedure: A mixture of 8.2 g of (R)-(-)2-butanol, 31.5 g of 1-bromo-4-benzenesulfonyl chloride, 1.0 g of N,N-dimethyl-4-pyridinamine, 55.5 ml of pyridine and 293 ml of dichloromethane was stirred for 3 days at room temperature. After the addition of water, stirring was continued for 1 hour. The reaction mixture was washed twice with a diluted hydrochloric acid solution and once with water, dried, filtered and evaporated in vacuo. The residue was purified by column chromatography over silica gel using trichloromethane as eluent. The pure fractions were collected and the eluent was evaporated, yielding 11.5 g (35.6%) of (R)-2-butanol 4-bromobenzenesulfonate (ester) (interm. 3). stirring was continued for 1 hour The reaction mixture was washed twice with a diluted hydrochloric acid solution and once with water dried filtered evaporated in vacuo The residue was purified by column chromatography over silica gel The pure fractions were collected the eluent was evaporated