tert-butyl (1S,4S)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a mixture of 3.0 g of tert-butyl (1S,4S)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate, 3.2 g of 1-(3-dimethyl-aminopropyl) -3-ethylcarbodiimide hydrochloride, 2.6 g of 1-hydroxybenzotriazole, 2.9 g of 2,3-dichlorobenzoic acid and 60 ml of chloroform was stirred at room temperature for 17 hours and then diluted with chloroform. An insoluble matter was filtered off using Celite and the resulting mixture was washed with water with saturated brine. The resulting organic layer was dried over magnesium sulfate and filtered, the filtrate was concentrated in vacuo and the resulting residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate=9/1 to 1/1) to give the title compound. An insoluble matter was filtered off the resulting mixture was washed with water with saturated brine The resulting organic layer was dried over magnesium sulfate filtered the filtrate was concentrated in vacuo the resulting residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate=9/1 to 1/1)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 1-[3-(methyloxy)-4-nitrophenyl]-4-piperidinone (Example 57, step B) (0.63 g, 2.5 mmol), 1,1-dimethylethyl (1S,4S)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate (1.0 g, 5.0 mmol), HOAc (0.23 g, 3.8 mmol), TEA (0.25 g, 2.5 mmol) in DCM (20 mL) is added sodium triacetoxyborohydride (0.81 g, 3.8 mmol). The mixture was stirred for 1 h then poured into saturated NaHCO3 solution (30 mL). The layers are separated and the aqueous layer washed with DCM. The organics are combined, dried (MgSO4), filtered and rotovaped. DCM and silica are added and the solvent removed by rotovap. After purification by silica gel chromatography, the title compound of step A (1.0 g, 2.4 mmol, 96%) is obtained as a yellow foam. 1H NMR (400 MHz, CDCl3) δ 7.97 (d, J=9.3 Hz, 1H), 6.39 (dd, J=9.3, 2.0 Hz, 1H), 6.28 (d, J=2.0 Hz, 1H), 4.36-4.20 (m, 1H), 3.91 (s, 3H), 3.79-3.40 (m, 4H), 3.16-3.01 (m, 4H), 2.64-2.37 (m, 2H), 1.93-1.68 (m, 4H), 1.61-1.49 (m, 2H), 1.44 (s, 9H). The layers are separated the aqueous layer washed with DCM dried (MgSO4) filtered DCM and silica are added the solvent removed by rotovap After purification by silica gel chromatography

反応条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-(4-chloro-benzyl)-5-(3-chloromethyl-[1,2,4]oxadiazol-5-yl)-7-methyl-2,3-dihydroisoindol-1-one (40 mg, 0.103 mmol) in MeCN (4 mL) was added K2CO3 (0.309 mmol) and (1s,4s)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (31 mg, 0.154 mmol). The mixture was heated at 60° C. overnight. The reaction was cooled and diluted with water, then extracted with EtOAc. The organic phase was washed with brine, dried (Na2SO4), filtered and concentrated. Column chromatography on silica (1% 2M NH3 in MeOH/CH2Cl2) provided 2-(4-chlorobenzyl)-5-[3-(2,5-diazabicyclo[2.2.1]hept-2-ylmethyl)-[1,2,4]oxadiazol-5-yl]-7-methyl-2,3-dihydroisoindol-1-one as a brown solid (27 mg). 1H NMR (300 MHz, CDCl3) δ 8.04 (s, 1H), 7.99 (s, 1H), 7.37 (d, 2H), 7.26 (d, 2H), 4.77 (s, 2H), 4.30 (s, 2H), 3.94 (dd, 2H), 3.58 (d, 2H), 3.26 (d, 1H), 3.11 (d, 1H), 2.89 (d, 1H), 2.84 (s, 3H), 2.63 (d, 1H), 1.88 (d, 1H), 1.66 (d, 1H). The reaction was cooled extracted with EtOAc The organic phase was washed with brine dried (Na2SO4) filtered concentrated

反応条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-(4-chloro-benzyl)-5-(3-chloromethyl-[1,2,4]oxadiazol-5-yl)-7-methyl-2,3-dihydroisoindol-1-one (40 mg, 0.103 mmol) in MeCN (4 mL) was added K2CO3 (0.309 mmol) and (1s, 4s)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (31 mg, 0.154 mmol). The mixture was heated at 60° C. overnight. The reaction was cooled and diluted with water, then extracted with EtOAc. The organic phase was washed with brine, dried (Na2SO4), filtered and concentrated. Column chromatography on silica (1% 2M NH3 in MeOH/CH2Cl2) provided 2-(4-chlorobenzyl)-5-[3-(2,5-diazabicyclo[2.2.1]hept-2-ylmethyl)-[1,2,4]oxadiazol-5-yl]-7-methyl-2,3-dihydroisoindol-1-one as a brown solid (27 mg). 1H NMR (300 MHz, CDCl3) δ 8.04 (s, 1H), 7.99 (s, 1H), 7.37 (d, 2H), 7.26 (d, 2H), 4.77 (s, 2H), 4.30 (s, 2H), 3.94 (dd, 2H), 3.58 (d, 2H), 3.26 (d, 1H), 3.11 (d, 1H), 2.89 (d, 1H), 2.84 (s, 3H), 2.63 (d, 1H), 1.88 (d, 1H), 1.66 (d, 1H). The reaction was cooled extracted with EtOAc The organic phase was washed with brine dried (Na2SO4) filtered concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of (S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (35.6 g, 179 mmol) in CH2Cl2 (600 mL) was added trimethylsilylisocyanate (82.5 g, 716 mmol). After 2 h at rt, the mixture was concentrated, and the resulting white solid was dissolved in CH2Cl2 (500 mL). The solution was then treated with a solution of HCl (4.0 N in 1,4-dioxane, 135 mL). The resulting heterogeneous suspension was then stirred at rt overnight. Upon evaporation of the solvents, the desired product was isolated as a white solid (33 g), which was used directly in the next step. [Note: the mass balance was found to be 104%, which arose from additional HCl that could not be removed by standard evaporation under vacuum]. 1H NMR (500 MHz, CD3OD): 4.77 (s, 1H), 4.55 (s, 1H), 3.69 (d, J=12.1 Hz, 1H), 3.64 (d, J=12.1 Hz, 1H), 3.47 (d, J=11.3 Hz, 1H), 3.40 (d, J=11.3 Hz, 1H), 2.22 (d, J=11.5 Hz, 1H), 2.15 (d, J=11.5 Hz, 1H). the mixture was concentrated the resulting white solid was dissolved in CH2Cl2 (500 mL) The solution was then treated with a solution of HCl (4.0 N in 1,4-dioxane, 135 mL) Upon evaporation of the solvents

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred solution of 2-[4-(2-bromo-ethoxy)-phenoxy]-benzothiazole (1.5 g, 4.3 mmol) and (S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (1.0 g, 5.1 mmol) in CH3CN (20 mL) at rt was added diisopropylethylamine ((i-Pr)2NEt) (900 μL, 5.1 mmol). The resulting suspension was stirred at rt for 4 h and then heated for 65 h at 60° C. The solution was cooled to rt and then partitioned between CH2Cl2 (200 mL) and satd. aq. NaHCO3 (80 mL). The organic layer was separated, dried (Na2SO4), filtered and concentrated. Purification by silica gel flash chromatography (0% to 5% CH3OH in CH2Cl2) afforded the title compound as a yellow oil (1.8 g, 92%). MS (ESI): mass calcd. for C25H29N3O4S, 467.19; m/z found, 468.1 [M+H]+. 1H NMR (500 MHz, CDCl3): 7.75 (d, J=8.0 Hz, 1H), 7.68-7.66 (m, 1H), 7.42-7.38 (m, 1H), 7.31-7.25 (m, 3H), 6.99-6.95 (m, 2H), 4.40 (br s, 0.5H), 4.27 (br s, 0.5H), 4.13-4.03 (m, 2H), 3.66-3.51 (m, 2H), 3.26-2.97 (m, 4H), 2.78 (d, J=9.5 Hz, 0.5H), 2.63 (d, J=9.7 Hz, 0.5H), 1.92-1.85 (m, 1H), 1.79-1.70 (m, 1H), 1.49 (s, 9H). heated for 65 h at 60° C The solution was cooled to rt partitioned between CH2Cl2 (200 mL) The organic layer was separated dried (Na2SO4) filtered concentrated Purification by silica gel flash chromatography (0% to 5% CH3OH in CH2Cl2)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred solution of 2-[4-(2-bromo-ethyl)-phenoxy]-benzothiazole (1.5 g, 4.5 mmol) and (S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (980 mg, 4.9 mmol) in CH3CN (20 mL) at rt was added Et3N (900 μL, 6.3 mmol). The resulting suspension was stirred at rt for 24 h and then partitioned between CH2Cl2 (200 mL) and satd. aq. NaHCO3 (80 mL). The organic layer was separated, dried (Na2SO4), filtered and concentrated. Purification by silica gel flash chromatography (EtOAc) afforded the title compound as a white foam (1.1 g, 56%). MS (ESI): mass calcd. for C25H29N3O3S, 451.19; m/z found, 452.2 [M+H]+. 1H NMR (500 MHz, CDCl3, mixture of rotamers): 7.73 (d, J=8.4 Hz, 1H), 7.66 (d, J=7.5 Hz, 1H), 7.38 (m, 1H), 7.30-7.24 (m, 5H), 4.38 (br m, 0.5H), 4.24 (br m, 0.5H), 3.53 (br m, 2H), 3.16 (t, J=10.4 Hz, 1H), 3.03 (d, J=8.4 Hz, 0.5H), 2.98 (d, J=9.8 Hz, 0.5H), 2.86-2.74 (br m, 4H), 2.69 (br d, J=9.8 Hz, 0.5H), 2.52 (br d, J=9.4 Hz, 0.5H), 1.84 (br d, J=9.2 Hz, 1H), 1.73 (br d, J=10.0 Hz, 0.5H), 1.69 (br d, J=9.2 Hz, 0.5H), 1.46 (s, 9H). partitioned between CH2Cl2 (200 mL) The organic layer was separated dried (Na2SO4) filtered concentrated Purification by silica gel flash chromatography (EtOAc)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-(4-chloromethyl-benzyl)-benzothiazole (1.0 g, 3.7 mmol) and (S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (0.9 g, 4.4 mmol) in CH3CN (36 mL) was added Et3N (0.77 mL, 5.5 mmol) and the resulting solution was stirred at rt for 24 h. The reaction mixture was then concentrated and the crude residue was then partitioned between CH2Cl2 (200 mL) and satd. aq. NaHCO3 (200 mL). The organic layer was separated, dried (MgSO4), filtered and concentrated. Purification by silica gel flash chromatography (0% to 10% CH3OH in CH2Cl2) afforded the title compound as clear oil (0.88 g, 55%). MS (ESI): mass calcd. for C25H29N3O2S, 435.59; m/z found, 436.2 [M+H]+. 1H NMR (500 MHz, CDCl3, mixture of rotamers): 8.01 (d, J=8.2 Hz, 1H), 7.81 (d, J=8.0 Hz, 1H), 7.48-7.45 (m, 1H), 7.37-7.34 (m, 5H), 4.44 (s, 2H), 4.40 (br s, 0.5H), 4.25 (br s, 0.5H), 3.75-3.75 (m, 2H), 3.64-3.44 (m, 2H), 3.17 (t, J=11.3 Hz, 1H), 2.90 (dd, J=25.2, 9.5 Hz, 1H), 2.74 (d, J=9.6 Hz, 0.5H), 2.55 (d, J=9.4 Hz, 0.5H), 1.88-1.86 (br m, 1H), 1.73-1.65 (br m, 1H), 1.48 (s, 9H). The reaction mixture was then concentrated the crude residue was then partitioned between CH2Cl2 (200 mL) The organic layer was separated dried (MgSO4) filtered concentrated Purification by silica gel flash chromatography (0% to 10% CH3OH in CH2Cl2)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred solution of 2-(4-chloromethyl-phenoxy)-benzothiazole (15.3 g, 55.3 mmol) and (S,S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (13.2 g, 66.4 mmol) in CH3CN (200 mL) was added triethylamine (Et3N) (11.5 mL, 82.9 mmol). The resulting solution was stirred at rt for 24 h and then concentrated. The crude residue was then partitioned between CH2Cl2 (800 mL) and saturated (satd.) aqueous (aq.) NaHCO3 (200 mL). The organic layer was separated, dried (Na2SO4), filtered and concentrated. Purification by silica gel flash chromatography (10% to 40% ethyl acetate (EtOAc) in hexanes) afforded the title compound as a white foam (17.2 g, 71%). MS (ESI): mass calcd. for C24H27N3O3S, 437.18; m/z found, 438.2 [M+H]+. 1H NMR (500 MHz, CDCl3, mixture of rotamers): 7.73 (d, J=7.1 Hz, 1H), 7.66 (d, J=7.1 Hz, 1H), 7.42 (d, J=8.1 Hz, 2H), 7.38 (m, 1H), 7.32-7.24 (br m, 3H), 4.40 (br m, 0.5H), 4.26 (br m, 0.5H), 3.76 (br d, J=9.7 Hz, 2H), 3.63 (br d, J=10.5 Hz, 0.5H), 3.50 (br m, 1H), 3.46 (m, 0.5H), 3.18 (br m, 1H), 2.93 (br d, J=8.8 Hz, 0.5H), 2.88 (br d, J=9.4 Hz, 0.5H), 2.73 (br d, J=9.2 Hz, 0.5H), 2.55 (br d, J=9.2 Hz, 0.5H), 1.87 (br t, J=8.8 Hz, 1H), 1.74 (br d, J=9.3 Hz, 0.5H), 1.68 (br d, J=9.3 Hz, 0.5H), 1.47 (s, 9H). concentrated The crude residue was then partitioned between CH2Cl2 (800 mL) and saturated (satd.) aqueous (aq.) NaHCO3 (200 mL) The organic layer was separated dried (Na2SO4) filtered concentrated Purification by silica gel flash chromatography (10% to 40% ethyl acetate (EtOAc) in hexanes)

反応条件: temp:55.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: (1S,4S)-tert-butyl 2,5-diazabicyclo[2.2.1]heptane-2-carboxylate (525 mg, 2.65 mmol) and potassium phosphate (1686 mg, 7.94 mmol) were combined in a 75 mL medium pressure flask and purged in a 50° C. vacuum oven for 10 mins and placed under N2 (g) atmosphere. THF (30 mL) was added, followed by 1-bromo-2-chloroethane (1.124 mL, 13.24 mmol) and the mixture was heated to 55° C. for 18 h. The reaction mixture was cooled to rt, treated with more 1-bromo-2-chloroethane (0.043 mL, 0.517 mmol) and heated back up to 55° C. for 68 h. The reaction was filtered and washed with DCM. The liquid filtrate was concentrated to viscous brown oil which was purified by column chromatography (SiO2, 40 g cartridge, eluted with 95:5 DCM:MeOH), dried under vacuum with stirring to give (1S,4S)-tert-butyl 5-(2-chloroethyl)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate (465 mg, 1.783 mmol, 67.3% yield) as viscous light brown oil. 1H NMR (400 MHz, CHLOROFORM-d) δ 7.37 (s, 1H), 4.36 (br. s., 1H), 4.24 (br. s., 1H), 3.44 (d, J=9.5 Hz, 1H), 3.17 (t, J=8.8 Hz, 1H), 3.08-2.94 (m, 1H), 2.93-2.85 (m, 2H), 2.67 (d, J=9.5 Hz, 1H), 2.53 (d, J=9.5 Hz, 1H), 1.82 (d, J=6.4 Hz, 1H), 1.71 (dd, J=15.9, 9.8 Hz, 1H), 1.46 (s, 9H). purged in a 50° C. vacuum oven for 10 mins THF (30 mL) was added The reaction mixture was cooled to rt heated back up to 55° C. for 68 h The reaction was filtered washed with DCM The liquid filtrate was concentrated to viscous brown oil which was purified by column chromatography (SiO2, 40 g cartridge, eluted with 95:5 DCM:MeOH) dried under vacuum

反応条件: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 4-Chloroquinoline (163.6 mg, 1 mmol) dissolved in 1-methoxy-2-propanol (4 ml) was added to tert-butyl (1S,4S)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate (237 mg, 1.2 mmol) and stirred at 115° C. for 72 hours. The solvent was removed under reduced pressure and the residue obtained (325 mg) was used directly in the next step. MS (APCI) m/z=326.0 [M+H]+. The solvent was removed under reduced pressure the residue obtained (325 mg)

反応条件: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Triethylamine (20 mL) was added to a suspension of t-butyl (S,S)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate (3.43 g, 17.3 mmol, Aldrich Chemical Company) and 3-chloro-6-phenylpyridazine (3.30 g, 17.3 mmol, Aldrich Chemical Company) in toluene (50 mL) and the mixture was heated under nitrogen at 100° C. for 7 days. The dark mixture was cooled to room temperature, and the resulting precipitate was isolated by filtration, washed with toluene (15 mL) and dried under vacuum to provide the title compound as an off-white solid (3.00 g). The filtrate was concentrated and the residue wa purified by column chromatography on silica gel, eluting with ethyl acetate, to provide additional product (0.41 g, total yield 3.41 g, 56%): MS (DCI/NH3) m/z 353 (M+H)+. The dark mixture was cooled to room temperature the resulting precipitate was isolated by filtration washed with toluene (15 mL) dried under vacuum