oxane-4-carboxamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-ethyl-3-iodopyrazolo[1,5-a]pyridine (350 g, 1.29 mol), tetrahydro-2H-4-pyrancarboxamide (249 g, 1.93 mol), copper iodide (49.0 g, 258 mmol), tripotassium phosphate (hydrate) (546 g, 2.57 mol), 1,2-cyclohexanediamine (mixture of cis and trans) (58.7 g, 514 mmol) and xylene (3500 mL) was stirred while heating at an external temperature of 120° C. (oil bath). The reaction mixture was heated and stirred for 6 hours, and then heating was terminated and upon reaching an internal temperature of 61.5° C., hot water (58° C., 3500 mL) was added to the reaction mixture and stirring was continued overnight. After adding 28% aqueous ammonia (1050 mL) to the reaction mixture and stirring for 1 hour, the precipitate was filtered out and washed with water (1750 mL) and ethyl acetate (1050 mL) and then dried under aeration at 60° C. overnight to afford 280 g of the title compound (major conformer:minor conformer=6:1) (79.6% yield). The reaction mixture was heated stirred for 6 hours heating was terminated an internal temperature of 61.5° C., hot water (58° C., 3500 mL) was added to the reaction mixture stirring After adding 28% aqueous ammonia (1050 mL) to the reaction mixture stirring for 1 hour the precipitate was filtered out washed with water (1750 mL) and ethyl acetate (1050 mL) dried under aeration at 60° C. overnight

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

Procedure: Concentrated aqueous ammonia (50 mL) was added to methyl tetrahydro-2H-pyran-4-carboxylate (50 g, 347 mmol) and the reaction mixture was stirred for 43.5 hours at room temperature. The reaction mixture was then cooled in an ice water bath, after which the precipitate was filtered out and dried under reduced pressure at 40° C. to afford 33.4 g of the title compound (74.6% yield). The reaction mixture was then cooled in an ice water bath after which the precipitate was filtered out dried under reduced pressure at 40° C.

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A solution of tetrahydro-2H-pyran-4-carboxamide (9.47 g, 73.3 mmol) and Lawesson's reagent (14.83 g, 36.7 mmol) in THF (98 mL) was heated to reflux for 6 h. The reaction was cooled to rt, poured into saturated aqueous NaHCO3 (200 mL) and extracted with diethyl ether (4×100 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated. The residual solid was triturated with 1:1 EtOAc:hexanes (100 mL) and filtered to collect the solid. The filtrate was concentrated and re-subjected to trituration and filtration using the same conditions. The combined solids were dried under vacuum to afford tetrahydro-2H-pyran-4-carbothioamide (4.91 g, 32.1 mmol, 43.8% yield) as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 7.49 (br. s., 1H), 6.84 (br. s., 1H), 3.94-4.32 (m, 2H), 3.31-3.62 (m, 2H), 2.52-3.03 (m, 1H), 1.81-1.93 (m, 4H). to reflux for 6 h extracted with diethyl ether (4×100 mL) The combined organic extracts were dried over Na2SO4 filtered concentrated The residual solid was triturated with 1:1 EtOAc hexanes (100 mL) and filtered to collect the solid The filtrate was concentrated re-subjected to trituration and filtration The combined solids were dried under vacuum

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

Procedure: A mixture of Example B5 (0.568 g, 4.40 mmol) and oxalyl chloride (0.400 mL, 4.66 mmol) in DCE (10 mL) was heated at 100° C. for 1 h, cooled to RT, added to a solution of Example A9 (0.650 g, 2.93 mmol) and pyridine (0.400 mL, 4.96 mmol) in DCM (10 mL) and stirred at RT for 2 days. The mixture was treated with satd. NaHCO3, extracted with EtOAc (3×) and the combined organics were dried over Na2SO4 and concentrated to dryness. The material was treated with MeCN, sonicated, the solid collected via filtration and purified via silica gel chromatography (MeOH/DCM) to afford N-((5-((2-chloropyridin-4-yl)oxy)pyridin-2-yl)carbamoyl)tetrahydro-2H-pyran-4-carboxamide (335 mg, 30%) as a white solid. MS (ESI) m/z: 377.1 (M+H+). The mixture was treated with satd NaHCO3, extracted with EtOAc (3×) the combined organics were dried over Na2SO4 concentrated to dryness The material was treated with MeCN sonicated the solid collected via filtration purified via silica gel chromatography (MeOH/DCM)

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

Procedure: A 0° C. solution of tetrahydro-2H-pyran-4-carboxylic acid (0.5 g, 3.84 mmol) in MeCN (15 mL) was treated with EDC (0.884 g, 4.61 mmol) and HOBT (0.706 g, 4.61 mmol) under an argon atmosphere and stirred at 0° C. for 1 h. Ammonium hydroxide (˜15M, 0.512 mL, 7.68 mmol) was added slowly and the mixture was warmed to RT and stirred overnight. The mixture was treated with water, saturated with solid NaCl and the aqueous layer was extracted with THF (2×). The combined organics were washed with brine, dried over Na2SO4 and concentrated to afford tetrahydro-2H-pyran-4-carboxamide (0.23 g, 46%) as a white solid. 1H NMR (400 MHz, DMSO-d6): δ 7.20 (s, 1H), 6.73 (s, 1H), 3.82-3.81 (m, 2H), 3.30-3.21 (m, 2H), 2.30-2.27 (m, 1H), 1.60-1.46 (m, 4H). the mixture was warmed to RT stirred overnight the aqueous layer was extracted with THF (2×) The combined organics were washed with brine dried over Na2SO4 concentrated

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

Procedure: In a 5 L flask, charge methyltetrahydropyran-4-carboxylate (500 ml, 3.75 mol) and concentrated ammonium hydroxide (1.3 L) and stir the reaction at room temperature for 48 hours. Filter the reaction and dry the white solid in a vacuum oven at 60° C. overnight. to obtained 36.33 g white solid of the title compound. the reaction at room temperature for 48 hours Filter the reaction dry the white solid in a vacuum oven at 60° C. overnight

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

Procedure: In a 5 L flask, charge methyltetrahydropyran-4-carboxylate (500 ml, 3.75 mol) and concentrated ammonium hydroxide (1.3 L) and stir the reaction at room temperature for 48 hours. Filter the reaction and dry the white solid in a vacuum oven at 60° C. overnight. to obtained 36.33 g white solid of the title compound. the reaction at room temperature for 48 hours Filter the reaction dry the white solid in a vacuum oven at 60° C. overnight

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

Procedure: tert-Butyl 4-(bromoacetyl)piperidine-1-carboxylate (1.07 g, 3.49 mmol) and tetrahydro-2H-pyran-4-carboxamide (0.95 g, 7.36 mmol) were mixed heated in DMPU (6.99 mL) at 150° C. for 4 hrs. LC-MS indicated that the reaction was completed and the product showed loss of Boc group. Et3N (1.46 mL, 10.5 mol) and Boc2O (0.915 g, 4.19 mmol) were added and the mixture was stirred at RT for 30 min. The reaction was diluted with water and dichloromethane. The two layers were separated and the organic layer was extracted with dichloromethane. The combined organic layers were washed with H2O (twice) and brine, dried over Na2SO4, filtered and conc. The crude (still containing DMPU) was used without purification. LC-MS: [M+H]+=337.4. The two layers were separated the organic layer was extracted with dichloromethane The combined organic layers were washed with H2O (twice) and brine dried over Na2SO4 filtered conc. The crude (still containing DMPU) was used without purification