2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone

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

Procedure: To N-[3-[5-chloro-2-(difluoromethoxy)phenyl]-1H-pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide (4.65 g, 11.5 mmol) and cesium carbonate (10.08 g, 30.94 mmol) was added N,N-Dimethylformamide (40 mL) and stirred at room temperature for 5 minutes. To this was added 2-Chloro-1-(1,4-dioxa-8-azaspiro[4,5]decan-8-yl)ethan-1-one (5.34 g, 20.2 mmol) in N,N-Dimethylformamide (4.5 mL) and stirred at room temperature for 3 and a half hours. LC/MS (method 31) shows reaction complete. The reaction was then filtered and the filtrate was concentrated under reduced pressure to give a red oil. This was then dissolved in 30 mL dichloromethane and purified by ISCO using a silica column and eluting with 0-100% Ethyl acetate in heptane in 5 minutes followed by 0-15% Methanol in dichloromethane to give 5.16 g (8.78 mmol) of N-[3-[5-chloro-2-(difluoromethoxy)phenyl]-1-[2-(1,4-dioxa-8-azaspiro[4,5]decan-8-yl)-2-oxo-ethyl]pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide as a yellow foamy solid. LC/MS (method 39) [M+H]+=589.2, RT=1.91 min. stirred at room temperature for 3 and a half hours reaction complete The reaction was then filtered the filtrate was concentrated under reduced pressure to give a red oil purified by ISCO eluting with 0-100% Ethyl acetate in heptane in 5 minutes

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

Procedure: To a solution of 1,4-dioxa-8-azaspiro[4,5]decane (9.80 g, 67.1 mmol) in dichloromethane (150 mL) under nitrogen was added triethylamine (11.2 mL, 80.5 mmol. This was then cooled to 0° C. and to this was added dropwise with stirring 2-chloroacetyl chloride (6.53 mL, 80.5 mmol) in dichloromethane (50 mL) over 1 and a half hours. This was then stirred overnight warming to room temperature in the process. The reaction was then quenched by adding 1 N HCl (100 mL). This was then extracted with ethyl acetate and the ethyl acetate layers were dried with solid anhydrous magnesium sulfate powder, filtered and concentrated to give 2-Chloro-1-(1,4-dioxa-8-azaspiro[4,5]decan-8-yl)ethan-1-one as a brown oil (15.44 g). This was used without purification for the next step. warming to room temperature in the process The reaction was then quenched by adding 1 N HCl (100 mL) This was then extracted with ethyl acetate the ethyl acetate layers were dried with solid anhydrous magnesium sulfate powder filtered concentrated

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

Procedure: A solution of pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [3-(5-chloro-2-difluoromethoxy-phenyl)-1H-pyrazol-4-yl]-amide (32.0 g, 79.1 mmol) in DMF (400 mL) was treated with 2-chloro-1-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-ethanone (20.8 g, 94.9 mmol) and Cs2CO3 (51.5 g, 158.1 mmol) and the mixture was stirred at room temperature for 19 hours. The reaction was diluted with water (˜1.6 L) and the resultant precipitate was collected by filtration. The solid was washed with water dried under reduced pressure to afford pyrazolo[1,5-a]pyrimidine-3-carboxylic acid {3-(5-chloro-2-difluoromethoxy-phenyl)-1-[2-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-2-oxo-ethyl]-1H-pyrazol-4-yl}-amide as a beige solid (33.3 g, 72%). LCMS (Method 3) [M+H]+=588.2, RT=3.02 min. 1H NMR (400 MHz, CDCl3) δ: (ppm) 9.85 (s, 1H), 8.78 (dd, 1H, J=1.6, 6.9 Hz), 8.71 (s, 1H), 8.56 (dd, 1H, J=1.8, 4.0 Hz), 8.42 (s, 1H), 7.69 (d, 1H, J=2.5 Hz), 7.41 (dd, 1H, J=2.7, 8.7 Hz), 7.30-7.26 (m, 1H), 7.00 (dd, 1H, J=4.2, 6.9 Hz), 6.48 (t, 1H, J=74.0 Hz), 5.06 (s, 2H), 4.00-3.95 (m, 4H), 3.74 (dd, 2H, J=5.8, 5.8 Hz), 3.61 (dd, 2H, J=5.8, 5.8 Hz), 1.74-1.64 (m, 4H). the resultant precipitate was collected by filtration The solid was washed with water dried under reduced pressure

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

Procedure: A solution of pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [3-(5-chloro-2-difluoromethoxy-phenyl)-1H-pyrazol-4-yl]-amide (32.0 g, 79.1 mmol) in DMF (400 mL) was treated with 2-chloro-1-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-ethanone (20.8 g, 94.9 mmol) and Cs2CO3 (51.5 g, 158.1 mmol) and the mixture was stirred at room temperature for 19 hours. The reaction was diluted with water (˜1.6 L) and the resultant precipitate was collected by filtration. The solid was washed with water dried under reduced pressure to afford pyrazolo[1,5-a]pyrimidine-3-carboxylic acid {3-(5-chloro-2-difluoromethoxy-phenyl)-1-[2-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-2-oxo-ethyl]-1H-pyrazol-4-yl}-amide as a beige solid (33.3 g, 72%). LCMS (Method 3) [M+H]+=588.2, RT=3.02 min. 1H NMR (400 MHz, CDCl3) δ: (ppm) 9.85 (s, 1H), 8.78 (dd, 1H, J=1.6, 6.9 Hz), 8.71 (s, 1H), 8.56 (dd, 1H, J=1.8, 4.0 Hz), 8.42 (s, 1H), 7.69 (d, 1H, J=2.5 Hz), 7.41 (dd, 1H, J=2.7, 8.7 Hz), 7.30-7.26 (m, 1H), 7.00 (dd, 1H, J=4.2, 6.9 Hz), 6.48 (t, 1H, J=74.0 Hz), 5.06 (s, 2H), 4.00-3.95 (m, 4H), 3.74 (dd, 2H, J=5.8, 5.8 Hz), 3.61 (dd, 2H, J=5.8, 5.8 Hz), 1.74-1.64 (m, 4H). the resultant precipitate was collected by filtration The solid was washed with water dried under reduced pressure

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

Procedure: Synthesized from pivalic acid 6-{2-[(4-hydroxybenzoyl)propylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (21 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (18 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (9.1 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[(4-hydroxybenzoyl)propylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (21 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (18 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (9.1 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[(3-fluoro-4-hydroxybenzoyl)methylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (20 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (17 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (8.4 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[(4-hydroxybenzoyl)methylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (25 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (22 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (13 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[ethyl(4-hydroxybenzoyl)amino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (26 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (23 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (5.6 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[(4-hydroxybenzoyl)isopropylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (21 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (18 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (4.2 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[(3-fluoro-4-hydroxybenzoyl)isopropylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (25 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (21 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (6.2 mg) was obtained. purified by LC-MS

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

Procedure: Synthesized from pivalic acid 6-{2-[(4-hydroxybenzoyl)propylamino]-4-methoxyphenyl}-5,6,7,8-tetrahydronaphthalen-2-yl ester (21 mg) and 2-chloro-1-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)ethanone (18 mg) according to an analogous synthetic method to Example 404 and purified by LC-MS, the title compound (9.1 mg) was obtained. purified by LC-MS