N-tert-butyl-2-chloroacetamide

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

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

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

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: To a suspension of methyl 5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylate (2.69 g, 12 mmol) in CH3CN (30 mL) was added K2CO3 (2.01 g, 14.5 mmol), KI (2.0 g, 12 mmol), and N-tert-butyl-2-chloroacetamide (1.8 g, 12 mmol). The reaction mixture was refluxed overnight and quenched with H2O (150 mL). The resulting precipitate was filtered and dried to afford methyl 3-(2-(tert-butylamino)-2-oxoethyl)-5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylate, as a solid (yield: quantitative). The reaction mixture was refluxed overnight quenched with H2O (150 mL) The resulting precipitate was filtered dried

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

Procedure: To a cooled (0° C.) solution of tert-butyl amine (5.25 mL, 50 mmol) in DCM (40 mL) was added triethylamine (14 mL, 101 mmol) followed by chloro acetylchloride (3.98 mL, 50.3 mmol). The reaction was warmed to RT and stirred for 2 h. The reaction mixture was concentrated, redissolved in EtOAc (20 mL) and washed with brine. The organic layer was dried over anhydrous Na2SO4 and concentrated to yield 5.39 g of crude product which was further purified by flash column chromatography using 7:3 Pet. Ether: EtOAc as the eluant. Pure N-tert-butyl-2-chloroacetamide (3.65 g) was isolated. The reaction mixture was concentrated redissolved in EtOAc (20 mL) washed with brine The organic layer was dried over anhydrous Na2SO4 concentrated to yield 5.39 g of crude product which was further purified by flash column chromatography

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

Procedure: To a suspension of 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene trifluoroacetic acid salt (300 mg, 0.61 mmol) in THF (5 mL) was added potassium carbonate (295 mg, 2.13 mmol) and N-tert-butyl-2-chloro-acetamide (100 mg, 0.67 mmol). The mixture was stirred for 5 days before being diluted with DCM and washed with water (2×30 mL). The organic phase was dried (MgSO4) and concentrated in vacuo. The resultant residue was triturated in diethyl ether, affording 274 as a cream solid (169 mg, 0.34 mmol, 56%). LCMS: RT=3.12 min, [M+H]+=492. 1H NMR δ (ppm) (DMSO-d): 8.29 (1H, d, J=8.29 Hz), 7.86 (1H, d, J=0.63 Hz), 7.85 (1H, s), 7.15 (1H, s), 7.03 (1H, dd, J=8.36, 1.77 Hz), 6.89 (1H, d, J=1.71 Hz), 5.90-5.80 (1H, m), 4.48-4.41 (4H, m), 2.85 (2H, d, J=11.24 Hz), 2.81 (2H, s), 2.20-2.09 (2H, m), 1.78-1.67 (2H, m), 1.70-1.58 (2H, m), 1.44 (6H, d, J=6.60 Hz), 1.25 (9H, s). 1H obscured by solvent. washed with water (2×30 mL) The organic phase was dried (MgSO4) concentrated in vacuo The resultant residue was triturated in diethyl ether

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

Procedure: To a suspension of 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene trifluoroacetic acid salt (300 mg, 0.61 mmol) in THF (5 mL) was added potassium carbonate (295 mg, 2.13 mmol) and N-tert-butyl-2-chloro-acetamide (100 mg, 0.67 mmol). The mixture was stirred for 5 days before being diluted with DCM and washed with water (2×30 mL). The organic phase was dried (MgSO4) and concentrated in vacuo. The resultant residue was triturated in diethyl ether, affording 274 as a cream solid (169 mg, 0.34 mmol, 56%). LCMS: RT=3.12 min, [M+H]+=492. 1H NMR δ (ppm) (DMSO-d): 8.29 (1H, d, J=8.29 Hz), 7.86 (1H, d, J=0.63 Hz), 7.85 (1H, s), 7.15 (1H, s), 7.03 (1H, dd, J=8.36, 1.77 Hz), 6.89 (1H, d, J=1.71 Hz), 5.90-5.80 (1H, m), 4.48-4.41 (4H, m), 2.85 (2H, d, J=11.24 Hz), 2.81 (2H, s), 2.20-2.09 (2H, m), 1.78-1.67 (2H, m), 1.70-1.58 (2H, m), 1.44 (6H, d, J=6.60 Hz), 1.25 (9H, s). 1H obscured by solvent. washed with water (2×30 mL) The organic phase was dried (MgSO4) concentrated in vacuo The resultant residue was triturated in diethyl ether

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

Procedure: To a solution of 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene 375 TFA salt (250 mg, 0.49 mmol) in THF (5 mL) was added potassium carbonate (136 mg, 0.98 mmol) followed by N-tert-butyl-2-chloroacetamide (81 mg, 0.54 mmol). The reaction mixture was stirred for 65 hours before being diluted with DCM and water. The organic layer was dried over anhydrous magnesium sulfate and concentrated in vacuo. The resulting residue was purified by silica gel flash chromatography (SiO2, gradient 0-3% methanol in DCM) then freeze-dried from methanol and water to give 510 as a beige solid (158 mg, 63%). LCMS: RT=3.67 min, [M+H]+=509. 1H NMR δ (ppm) (CDCl3): 8.34 (1H, d, J=8.18 Hz), 7.93 (1H, s), 7.10-7.06 (2H, m), 6.96 (1H, d, J=1.81 Hz), 5.92-5.91 (1H, m), 4.42 (2H, t, J=5.03 Hz), 3.42 (2H, t, J=5.05 Hz), 3.00-2.91 (4H, m), 2.61-2.48 (1H, m), 2.35-2.24 (2H, m), 1.96-1.87 (3H, m), 1.83-1.71 (1H, m), 1.64 (6H, d, J=6.63 Hz), 1.39 (9H, s) The organic layer was dried over anhydrous magnesium sulfate concentrated in vacuo The resulting residue was purified by silica gel flash chromatography (SiO2, gradient 0-3% methanol in DCM) then freeze-dried from methanol and water

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

Procedure: To a solution of 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene 375 TFA salt (250 mg, 0.49 mmol) in THF (5 mL) was added potassium carbonate (136 mg, 0.98 mmol) followed by N-tert-butyl-2-chloroacetamide (81 mg, 0.54 mmol). The reaction mixture was stirred for 65 hours before being diluted with DCM and water. The organic layer was dried over anhydrous magnesium sulfate and concentrated in vacuo. The resulting residue was purified by silica gel flash chromatography (SiO2, gradient 0-3% methanol in DCM) then freeze-dried from methanol and water to give 510 as a beige solid (158 mg, 63%). LCMS: RT=3.67 min, [M+H]+=509. 1H NMR δ (ppm) (CDCl3): 8.34 (1H, d, J=8.18 Hz), 7.93 (1H, s), 7.10-7.06 (2H, m), 6.96 (1H, d, J=1.81 Hz), 5.92-5.91 (1H, m), 4.42 (2H, t, J=5.03 Hz), 3.42 (2H, t, J=5.05 Hz), 3.00-2.91 (4H, m), 2.61-2.48 (1H, m), 2.35-2.24 (2H, m), 1.96-1.87 (3H, m), 1.83-1.71 (1H, m), 1.64 (6H, d, J=6.63 Hz), 1.39 (9H, s) The organic layer was dried over anhydrous magnesium sulfate concentrated in vacuo The resulting residue was purified by silica gel flash chromatography (SiO2, gradient 0-3% methanol in DCM) then freeze-dried from methanol and water

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