3-bromooxetane

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

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

Procedure: In analogy to the procedure described for the synthesis of 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3-ethyl-3H-[1,2,3]triazolo[4,5-d]pyrimidine (example 61), the title compound was prepared from 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine and 3-bromooxetane and isolated as light-yellow gum. MS (m/e): 339.3 (MH+). isolated as light-yellow gum

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Bromo-1H-pyrazole (1.53 g, 10.7 mmol) is dissolved in anhydrous dimethylformamide (15 mL). 3-Bromooxetane (2.0 g, 14.6 mmol) and caesium carbonate (4.7 g, 14 mmol) are successively added thereto. The reaction mixture is heated for 8 hours at 130° C. in a sealed flask. At the end of the reaction, the solvent is evaporated off in vacuo and the residue is purified by chromatography over silica gel using dichloromethane containing diethylamine and methanol as eluants to yield the expected compound. At the end of the reaction the solvent is evaporated off in vacuo the residue is purified by chromatography over silica gel containing diethylamine and methanol as eluants

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

Procedure: In analogy to the procedure described for the synthesis of 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3-ethyl-3H-[1,2,3]triazolo[4,5-d]pyrimidine (example 61), the title compound was prepared from 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine and 3-bromooxetane and isolated as light-yellow gum. MS (m/e): 339.3 (MH+). isolated as light-yellow gum

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

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

Procedure: In analogy to the procedure described for the synthesis of 5-tert-butyl-7-(3,3-difluoro-pyrrolidin-1-yl)-2-ethyl-2H-[1,2,3]triazolo[4,5-d]pyrimidine (example 3, step b), the title compound was prepared from 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine and 3-bromooxetane and isolated as light-brown solid (2.8 mg, 20%). MS (m/e): 339.3 (MH+).

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

Procedure: In analogy to the procedure described for the synthesis of 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3-ethyl-3H-[1,2,3]triazolo[4,5-d]pyrimidine (example 61), the title compound was prepared from 5-tert-butyl-7-(3,3-difluoropyrrolidin-1-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine and 3-bromooxetane and isolated as light-yellow gum. MS(m/e): 339.3 (MH+). isolated as light-yellow gum

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

Procedure: Ethyl 6-bromo-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (1 equiv.) was suspended in acetonitrile and K2CO3 (1.5 equiv.) and 3-bromooxetane (2 equiv.) was added to it. The reaction mixture was refluxed for 8 h. On completion, acetonitrile was removed under reduced pressure and water was added to it. Extraction was carried out using ethyl acetate; the combined organic layers were washed with water, brine and dried over anhydrous Na2SO4. Solvent was removed under reduced pressure and residue was purified by silica gel column chromatography to obtain the desired intermediate. The reaction mixture was refluxed for 8 h On completion, acetonitrile was removed under reduced pressure and water was added to it Extraction the combined organic layers were washed with water, brine dried over anhydrous Na2SO4 Solvent was removed under reduced pressure and residue was purified by silica gel column chromatography

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

Procedure: Ethyl 6-bromo-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (1 equiv.) was suspended in acetonitrile and K2CO3 (1.5 equiv.) and 3-bromooxetane (2 equiv.) was added to it. The reaction mixture was refluxed for 8 h. On completion, acetonitrile was removed under reduced pressure and water was added to it. Extraction was carried out using ethyl acetate; the combined organic layers were washed with water, brine and dried over anhydrous Na2SO4. Solvent was removed under reduced pressure and residue was purified by silica gel column chromatography to obtain the desired intermediate. The reaction mixture was refluxed for 8 h On completion, acetonitrile was removed under reduced pressure and water was added to it Extraction the combined organic layers were washed with water, brine dried over anhydrous Na2SO4 Solvent was removed under reduced pressure and residue was purified by silica gel column chromatography

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

Procedure: Ethyl 6-bromo-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (1 equiv.) was suspended in acetonitrile and K2CO3 (1.5 equiv.) and 3-bromooxetane (2 equiv.) was added to it. The reaction mixture was refluxed for 8 h. On completion, acetonitrile was removed under reduced pressure and water was added to it. Extraction was carried out using ethyl acetate; the combined organic layers were washed with water, brine and dried over anhydrous Na2SO4. Solvent was removed under reduced pressure and residue was purified by silica gel column chromatography to obtain the desired intermediate. The reaction mixture was refluxed for 8 h On completion, acetonitrile was removed under reduced pressure and water was added to it Extraction the combined organic layers were washed with water, brine dried over anhydrous Na2SO4 Solvent was removed under reduced pressure and residue was purified by silica gel column chromatography

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of K2CO3 (19.8 mg, 0.144 mmol), 3-((5-methyl-3-(3-(4-(trifluoromethoxy)phenyl)-1,2,4-oxadiazol-5-yl)-1H-1,2,4-triazol-1-yl)methyl)phenol (Example 59; 30.0 mg, 0.072 mmol), sodium iodide (21.6 mg, 0.144 mmol) and 3-bromooxetane (22 uL, 0.288 mmol) in DMF (0.36 mL) was stirred at 50° C. for 48 h. The crude mixture was diluted with H2O and extracted with 4:1 CHCl3:i-PrOH. The organic layer was dried over MgSO4, concentrated under reduced pressure, and the residue was purified using Prep-HPLC to furnish the title compound; MS (ES+) C22H18F3N5O4 requires: 473. found 474 [M+H]+; 1H-NMR (600 MHz, CD3OD) δ ppm 8.28 (d, J=8.8 Hz, 2H), 7.35 (d, J=8.2 Hz, 2H), 7.28 (m, 1H), 6.86 (d, J=7.8 Hz, 1H), 6.64 (m, 2H), 5.42 (s, 2H), 5.18 (m, 1H), 4.95 (m, 2H), 4.74 (m, 2H), 2.54 (s, 3H). extracted with 4:1 CHCl3 The organic layer was dried over MgSO4 concentrated under reduced pressure the residue was purified

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Bromo-1H-pyrazole (1.53 g, 10.7 mmol) is dissolved in anhydrous dimethylformamide (15 mL). 3-Bromooxetane (2.0 g, 14.6 mmol) and caesium carbonate (4.7 g, 14 mmol) are successively added thereto. The reaction mixture is heated for 8 hours at 130° C. in a sealed flask. At the end of the reaction, the solvent is evaporated off in vacuo and the residue is purified by chromatography over silica gel using dichloromethane containing diethylamine and methanol as eluants to yield the expected compound. At the end of the reaction the solvent is evaporated off in vacuo the residue is purified by chromatography over silica gel containing diethylamine and methanol as eluants