tert-butyl N-(4-iodophenyl)carbamate

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 N-tertiary-butyloxycarbonyl-4-iodoaniline (11.5 g, see P G Ciattini et al, Tet. Lett, 1995, 36, 4133-4136 for preparation) in dimethylformamide (70 mL), under nitrogen, was treated portionwise with sodium hydride (1.6 g, 60% dispersion in mineral oil). When effervescence had ceased (after about 5 minutes) the mixture was treated with methyl iodide and stirring was continued at room temperature for 2 hours. The reaction mixture was partitioned between ethyl acetate (500 mL) and water (500 mL). The organic phase was dried and then evaporated to give the title compound (11.5 g) as a pink oil. (after about 5 minutes) The reaction mixture was partitioned between ethyl acetate (500 mL) and water (500 mL) The organic phase was dried evaporated

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: (4-Iodo-phenyl)-carbamic acid tert-butyl ester (2.0 g, 6.27 mmol) was dissolved in THF (50 mL), treated with triethylamine (4.4 mL, 31.4 mmol), phenylacetylene (1.03 mL, 9.40 mmol), cuprous iodide (0.06 g, 0.31 mmol), and Pd(Ph3)2Cl2 (0.44 g, 0.63 mmol). The reaction was stirred overnight, then filtered and concentrated. The crude material was chromatographed on silica gel eluting with 7:1 hexane/EtOAc to give 1.48 g (80%) of the desired product. filtered concentrated The crude material was chromatographed on silica gel eluting with 7:1 hexane/EtOAc

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

Procedure: (4-Iodo-phenyl)-carbamic acid tert-butyl ester (2.0 g, 6.27 mmol) was dissolved in THF (50 mL), treated with triethylamine (4.4 mL, 31.4 mmol), phenylacetylene (1.03 mL, 9.40 mmol), cuprous iodide (0.06 g, 0.31 mmol), and Pd(Ph3)2Cl2 (0.44 g, 0.63 mmol). The reaction was stirred overnight, then filtered and concentrated. The crude material was chromatographed on silica gel eluting with 7:1 hexane/EtOAc to give 1.48 g (80%) of the desired product. filtered concentrated The crude material was chromatographed on silica gel eluting with 7:1 hexane/EtOAc

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

Procedure: (4-Iodo-phenyl)-carbamic acid tert-butyl ester (37a, 1.0 g, 3.13 g) was dissolved in THF (30 mL) and treated with Et3N (2.2 mL, 15.7 mmol), 3,3-dimethyl- 1-butyne (0.58 mL, 4.70 mmol), bis(triphenylphosphine) palladium (II) chloride (0.218 g, 0.31 mmol), and copper (I) iodide (0.03 g, 0.16 mmol). The reaction was stirred overnight at room temperature, then filtered and concentrated. The residue was chromatographed on silica gel eluting with 8:1 hexanes/EtOAc to give 0.7 g (82%) of the mostly clean desired product which was carried on without further purification. filtered concentrated The residue was chromatographed on silica gel eluting with 8:1 hexanes/EtOAc

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 6-bromo-1-cyclobutyl-1H-indole-3-carbonitrile (1.38 g, 5.0 mmol), and triisopropylborate (1.37 mL, 6.0 mmol) in THF (15.0 mL) at −78° C. was added LDA (1.5M mono THF in cyclohexane, 3.83 mL, 5.75 mmol) with stirring. The mixture was stirred at −78° C. for 10 min and at room temperature for 30 min followed by addition of (4-iodophenyl)-carbamic acid tert-butyl ester (1.75 g, 5.5 mmol) and PdCl2(dppf) (0.37 g, 0.5 mmol). The reaction mixture was cooled to −78° C., flushed with nitrogen and DMF (30 mL) and aq. K2CO3 (2.0M, 7.5 mL, 15.0 mmol) added. The mixture was stirred at −78° C. for 20 min, room temperature overnight and poured into ice water (200 mL). The precipitate was filtered, washed with water and purified on silica gel (hexanes/EtOAc, 9:1 to 8:2) to give [4-(6-bromo-3-cyano-1-cyclobutyl-1H-indol-2-yl)-phenyl]-carbamic acid tert-butyl ester as a solid (1.23 g, 53%). The mixture was stirred at −78° C. for 10 min and at room temperature for 30 min added The mixture was stirred at −78° C. for 20 min, room temperature overnight The precipitate was filtered washed with water purified on silica gel (hexanes/EtOAc, 9:1 to 8:2)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 6-bromo-1-cyclobutyl-1H-indole-3-carbonitrile (1.38 g, 5.0 mmol), and triisopropylborate (1.37 mL, 6.0 mmol) in THF (15.0 mL) at −78° C. was added LDA (1.5M mono THF in cyclohexane, 3.83 mL, 5.75 mmol) with stirring. The mixture was stirred at −78° C. for 10 min and at room temperature for 30 min followed by addition of (4-iodophenyl)-carbamic acid tert-butyl ester (1.75 g, 5.5 mmol) and PdCl2(dppf) (0.37 g, 0.5 mmol). The reaction mixture was cooled to −78° C., flushed with nitrogen and DMF (30 mL) and aq. K2CO3 (2.0M, 7.5 mL, 15.0 mmol) added. The mixture was stirred at −78° C. for 20 min, room temperature overnight and poured into ice water (200 mL). The precipitate was filtered, washed with water and purified on silica gel (hexanes/EtOAc, 9:1 to 8:2) to give [4-(6-bromo-3-cyano-1-cyclobutyl-1H-indol-2-yl)-phenyl]-carbamic acid tert-butyl ester as a solid (1.23 g, 53%). The mixture was stirred at −78° C. for 10 min and at room temperature for 30 min added The mixture was stirred at −78° C. for 20 min, room temperature overnight The precipitate was filtered washed with water purified on silica gel (hexanes/EtOAc, 9:1 to 8:2)

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

Procedure: A degassed solution of 3-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)-4-methylpyridin-2(1H)-one (250 mg, 0.97 mmol), tert-butyl(4-iodophenyl)carbamate (200 mg, 0.97 mmol), N1,N2-dimethylethane-1,2-diamine (50 mg, 0.49 mmol), copper iodide (40 mg, 0.20 mmol), and potassium phosphate (410 mg, 1.94 mmol) in 2 mL of N-methylpyrrolidone was heated to 70° C. and stirred overnight (17 h). The reaction was complete and allowed to cool to room temperature. The reaction was extracted with EtOAc (3ט5 mL) and with NaHCO3 (2ט10 mL). The crude organic layers were combined, dried over anhydrous Na2SO4 (s), filtered and the concentrated in vacuo. The crude mixture was then purified using the ISCO flash chromatography system using an 0-100% EtOAc/100-0% Hexane gradient mixture. Following concentration of the appropriate fractions the desired product was collected as an off white solid (115 mg, 27%). 1H NMR (DMSO) δ: 9.52 (s, 1H), 7.92 (s, 1H), 7.45-7.52 (m, 2H), 7.41 (d, J=6.7 Hz, 1H), 7.24-7.31 (m, 2H), 6.28 (s, 2H), 6.17 (d, J=7.0 Hz, 1H), 3.96 (br. S, H), 3.29 (s, 2H), 2.66(t, j=5.3 Hz, 2H), 2.18 (s, 3H), 1.39 (s, 9H) The reaction was extracted with EtOAc (3ט5 mL) and with NaHCO3 (2ט10 mL) dried over anhydrous Na2SO4 (s) filtered the concentrated in vacuo The crude mixture was then purified was collected as an off white solid (115 mg, 27%)

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A degassed solution of 3-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)-4-methylpyridin-2(1H)-one (250 mg, 0.97 mmol), tert-butyl(4-iodophenyl)carbamate (200 mg, 0.97 mmol), N1,N2-dimethylethane-1,2-diamine (50 mg, 0.49 mmol), copper iodide (40 mg, 0.20 mmol), and potassium phosphate (410 mg, 1.94 mmol) in 2.0 mL of N-methylpyrrolidone was heated to 70° C. After allowing the reaction to stir overnight (17 h) at 70° C., the reaction was complete and allowed to cool to room temperature. The reaction was extracted with EtOAc (3×5 mL) and 2×'s with NaHCO3 (2×10 mL). The crude organic layers were combined, dried over anhydrous Na2SO4, filtered and the concentrated in vacuo. The crude mixture was then purified using the ISCO flash chromatography system using an 0-100% EtOAc/100-0% Hexane gradient mixture. Following concentration of the appropriate fractions the title compound was collected as an off white solid (150 mg, 33%). 1H NMR (DMSO) δ: 9.52 (s, 1H), 7.92 (s, 1H), 7.45-7.52 (m, 2H), 7.41 (d, J=6.7 Hz, 1H), 7.24-7.31 (m, 2H), 6.28 (s, 2H), 6.17 (d, J=7.0 Hz, 1H), 3.96 (br. S, H), 3.29 (s, 2H), 2.66(t, j=5.3 Hz, 2H), 2.18 (s, 3H), 1.39 (s, 9H). the reaction to cool to room temperature The reaction was extracted with EtOAc (3×5 mL) and 2×' dried over anhydrous Na2SO4 filtered the concentrated in vacuo The crude mixture was then purified was collected as an off white solid (150 mg, 33%)