methanamine;hydrochloride

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

Procedure: A mixture of 2-furanmethanol (49 g), methylamine hydrochloride (51.5 g) and 36% formaldehyde solution (50 ml) was stirred at 0°-3° for 3 hr and allowed to stand for 16 hr. Excess sodium carbonate was added and the slurry extracted with ethyl acetate. After removal of solvent the residue was distilled to give 5-(methylamino)methyl-2-furanmethanol (36.2 g) b.p. 111°-113° (0.2 mm). to stand for 16 hr the slurry extracted with ethyl acetate After removal of solvent the residue was distilled

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

Procedure: A solution of 4-(3-chloropropyl)-7-nitro-3,4-dihydro-2H-benzo[b][1,4]thiazine (1.1 g, 4.03 mmol), methylamine hydrochloride (0.545 g, 8.07 mmol), potassium iodide (0.669 g, 4.03 mmol), and potassium carbonate (2.79 g, 20.16 mmol) in dry acetonitrile (25 mL) was stirred at 80° C. in a sealed tube for 6 hours. The reaction was brought to room temperature and diluted with water (100 mL), and the product was extracted into ethyl acetate (3×25 mL). The combined ethyl acetate layers were washed with brine (20 mL) and dried (Na2SO4). The solvent was evaporated, and the crude material was purified by flash column chromatography (1:9 (2M NH3 in MeOH):CH2Cl2) on silica gel to obtain the title compound (0.8 g, 74%) as a thick syrup. 1H NMR (DMSO-d6) δ 7.84-7.81 (m, 2H), 6.86 (d, 1H, J=9.9 Hz), 3.78-3.75 (m, 2H), 3.50 (t, 2H, J=7.5 Hz), 3.08-3.04 (m, 2H), 2.48 (t, 2H, J=6.9 Hz), 2.27 (s, 3H), 1.74-1.64 (m, 2H); ESI-MS (m/z, %): 268 (MH+, 100). was brought to room temperature the product was extracted into ethyl acetate (3×25 mL) The combined ethyl acetate layers were washed with brine (20 mL) dried (Na2SO4) The solvent was evaporated the crude material was purified by flash column chromatography (1:9 (2M NH3 in MeOH):CH2Cl2) on silica gel

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

Procedure: To a mixture of 5-cyclohexyl-3-hydroxy-1-(4-isoxazol-3-ylphenyl)-4-(4-carboxybenzoyl)-1,5-dihydropyrrol-2-one (0.095 g, 0.2 mmol) and DMF (2 mL) was added, methylamine hydrochloride (0.020 g, 0.3 mmol), 1-hydroxybenztriazole (0.041 g, 0.3 mmol), 4-dimethylaminopyridinium (0.005 g, 0.04 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.058 g, 0.3 mmol) and triethylamine (0.042 mL, 0.3 mmol). The mixture was stirred at r.t. for 1 hr. Ethyl acetate and water were added, and the precipitate was collected by filtration to give 5-cyclohexyl-3-hydroxy-1-(4-isoxazol-3-ylphenyl)-4-(4-methylcarbamoylbenzoyl)-1,5-dihydropyrrol-2-one (0.062 g, 64%) as pale yellow crystals. was added the precipitate was collected by filtration

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

Procedure: To a stirred solution of {3-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]phenoxy}acetic acid (0.22 g, 0.5 mmol) in dry chloroform (5 mL) was added at ambient temperature oxalyl chloride (0.43 mL, 5.0 mmol) followed by 1 drop of N,N-dimethylformamide. The mixture was stirred at ambient temperature for 2 h and evaporated to dryness in vacuo to afford crude {3-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]phenoxy}acetyl chloride. The crude product was dissolved in dry dichloromethane (5 mL), and used in the next step. To a solution of methylamine hydrochloride (0.07 mg, 1.0 mmol) in dry dichloromethane (5 mL) containing triethylamine (0.35 mL, 2.5 mmol) was added at 0° C. 5.0 mL (0.50 mmol) of the stock solution of {3-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]phenoxy}acetyl chloride. The mixture was stirred at ambient temperature for 16 h, diluted with dichloromethane (20 mL), washed with 7% aqueous solution of citric acid (10 mL), water (10 mL), and brine (10 mL). The organic layer was dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by column chromatography (hexanes/ethyl acetate 1:3) to afford N-methyl-2-{3-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]phenoxy}acetamide (0.09 g, 40%) as a colorless solid: mp 175-176° C.; 1H NMR (300 MHz, CDCl3) δ 7.34-7.17 (m, 3H), 7.09-6.98 (m, 2H), 6.90 (s, 1H), 6.87-6.76 (m, 2H), 6.55 (br s, 1H), 6.48 (s, 1H), 6.44 (s, 1H), 5.09-4.96 (m, 2H), 4.88-4.79 (m, 1H), 4.75-4.69 (m, 1H), 4.60-4.51 (m, 2H), 4.47 (s, 2H), 3.11-2.92 (m, 2H), 2.92-2.88 (m, 3H); 13C NMR (75 MHz, CDCl3) δ 177.9, 168.4, 161.9, 161.3, 157.6, 142.0, 137.9, 132.7, 130.3, 128.7, 123.9, 123.5, 121.0, 120.1, 120.0, 118.8, 113.9, 113.6, 109.1, 93.3, 80.6, 72.4, 67.2, 57.7, 43.9, 29.0, 25.7; MS (ES+) m/z 457.0 (M+1). was added at 0° C washed with 7% aqueous solution of citric acid (10 mL), water (10 mL), and brine (10 mL) The organic layer was dried over anhydrous magnesium sulfate filtered concentrated in vacuo The residue was purified by column chromatography (hexanes/ethyl acetate 1:3)

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

Procedure: A DMF solution (3 mL) of trans-4-[8-amino-1-(2-phenylquinolin-7-yl)-imidazo[1,5-a]pyrazin-3-yl]-cyclohexanecarboxylic acid (260 mg, 0.56 mmol) and methylamine hydrochloride (379 mg, 5.6 mmol) in a sealed tube was charged with DIEA (0.98 mL, 5.6 mmol), 0.6M HOAt in DMF (0.93 mL, 0.56 mmol), and then EDC (161 mg, 0.84 mmol). The reaction mixture stirred at rt for 16 h. The reaction mixture was concentrated to solids, taken up in CH2Cl2, charged with silica, and concentrated to brown solids. The crude material was purified by silica gel column chromatography [Jones Flashmaster, 5 g/25 mL cartridge, eluting with 2%˜7N NH3 in MeOH/CH2Cl2]. The purified material was recrystallized from MeOH/CH2Cl2/diethyl ether to the desired product as a light yellow solid; 1H NMR (DMSO-d6, 400 MHz) δ 1.56-1.73 (m, 4H), 1.85-1.91 (m, 2H), 2.01-2.06 (m, 2H), 2.17-2.25 (m, 1H), 2.52 (d, 3H, J=4.4 Hz), 3.12-3.20 (m, 1H), 6.17 (s, 2H), 7.09 (d, 1H, J=4.8 Hz), 7.51-7.59 (m, 4H), 7.73 (d, 1H, J=4.8 Hz), 7.90 (dd, 1H, J=2.0 Hz, 8.4 Hz), 8.09 (d, 1H, J=8.4 Hz), 8.18 (d, 1H, J=8.8 Hz), 8.23 (s, 1H), 8.30 (d, 2H, J=7.6 Hz), 8.51 (d, 1H, J=8.4 Hz); MS (ES+): m/z 477.0 [MH+]; HPLC: tR=2.1 min (Micromass Platform II, polar—5 min). The reaction mixture was concentrated to solids charged with silica concentrated to brown solids The crude material was purified by silica gel column chromatography [Jones Flashmaster, 5 g/25 mL cartridge, eluting with 2%˜7N NH3 in MeOH/CH2Cl2] The purified material was recrystallized from MeOH/CH2Cl2/diethyl ether to the desired product as a light yellow solid HPLC: tR=2.1 min (Micromass Platform II, polar—5 min)

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

Procedure: To a suspension of 2-methyl-4,6-dimethoxy benzoic acid (2.8 g, 14.27 mmol) in CH2Cl2 (30 mL), oxalyl chloride(3.62 g, 28.54 mmol) was added and the mixture was stirred at rt for 16 h. The solvent and excess of oxalyl chloride were removed at reduced pressure. The solid was dissolved in CH2Cl2 (10 mL) and methyl amine hydrochloride (1.33 g, 42.81 mmol) was added on cooling and the mixture was stirred at rt for 4 h. The solvent was removed and the crude product was purified by chromatography by using 5% methanol in CH2Cl2, to give 1.3 g of the amide intermediate in 43% yield. To a solution of the amide intermediate (1.29 g, 6.16 mmol) in THF (30 mL), n-butyl lithium (5.6 mL, 14.18 mmol, 2.5 M solution in hexane) was added slowly under N2 with cooling( ice-salt bath) maintaining the temperature below 20° C. The mixture was stirred for 1 h at 0° C., then cooled to −50° C. and a solution of 4-O-TBDMS-benzonitrile (1.58 g, 6.78 mmol) in THF (10 mL) was added quickly. The cooling bath was removed and allowed to warm to rt and stirred for 16 h at rt. Saturated aqueous NH4Cl solution was added with cooling , and the layers were separated. The organic layer was washed with water, brine, dried over Na2SO4 and concentrated to give the crude intermediate, which was purified by chromatography using 5% methanol in CH2Cl2, to give two products (1) 678 mg of isoquinoline in 26% yield and (2) 780 mg of quinalone product in 27% yield. To a suspension of the above quinalone product (2) (780 mg, 1.65mmol) in ethanol (20 mL), conc. HCl (2 ml) was added and the mixture was heated at 70° C. for 2 h. The reaction mixture was cooled to rt and the solvent was removed and purified by chromatography using 5% methanol in CH2Cl2 to give 3-(4-hydroxyphenyl)-6,8-dimethoxyisoquinolin-1(2H)-one (215 mg, 44%). MS (ES) m/z: 297.93 (M); Mp. 245-247° C. was added The solvent and excess of oxalyl chloride were removed at reduced pressure The solid was dissolved in CH2Cl2 (10 mL) on cooling the mixture was stirred at rt for 4 h The solvent was removed the crude product was purified by chromatography

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

Procedure: A stirred suspension of 10 (500 mg, 2 mmol) and methylamine hydrochloride (15 g, 222 mmol) in isopropanol (50 ml) was heated at 130° C. in a sealed flask for four days, then cooled to room temperature. The reaction mixture was poured in water, and the pH was adjusted to ˜10 with 1N NaOH. After extraction of the aqueous phase with AcOEt, the combined organic layer was concentrated and directly purified by flash column chromatography (eluents 2% of NH4OH in methanol/CH2Cl2: 10/90 to 40/60) to afford title compound 344 (487 mg, 99% yield, hydrate form) as a beige solid. MS (m/z): 245.0 (M+H)+−. cooled to room temperature After extraction of the aqueous phase with AcOEt the combined organic layer was concentrated directly purified by flash column chromatography (eluents 2% of NH4OH in methanol/CH2Cl2: 10/90 to 40/60)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To an ethanol solution (2 ml) of 7-[1-(pyridin-4-yl)piperidin-4-ylmethoxy]-1,2,3,4-tetrahydroisoquinoline-2-carbothioimidic acid methyl ester (100 mg) were added methylamine hydrochloride (20 mg) and sodium acetate (25 mg), and the mixture was stirred at 80° C. for 3 hours. After completion of the reaction, water was added and the mixture was washed with chloroform. Thereto was added aqueous sodium hydrogencarbonate solution and the mixture was washed with chloroform. To the aqueous layer was added 4N aqueous sodium hydroxide solution and the mixture was extracted with chloroform. The extract was washed successively with water and saturated brine. The organic layer was dried over anhydrous sodium sulfate and the solvent was evaporated and the obtained residue was treated with hydrogen chloride—ethanol solution and dried under reduced pressure to give the title compound (80 mg). was added the mixture was washed with chloroform Thereto was added aqueous sodium hydrogencarbonate solution the mixture was washed with chloroform To the aqueous layer was added 4N aqueous sodium hydroxide solution the mixture was extracted with chloroform The extract was washed successively with water and saturated brine The organic layer was dried over anhydrous sodium sulfate the solvent was evaporated the obtained residue was treated with hydrogen chloride—ethanol solution dried under reduced pressure

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

Procedure: To a solution of 2-amino-6-[2-(benzyloxy)phenyl]-4-[1-(tert-butoxycarbonyl)-3-piperidinyl]nicotinic acid (0.500 g, 0.993 mmol) which was derived from the product in the step (1) of Example 9-1, methylamine hydrochloride (0.134 g, 1.896 mmol), triethylamine (0.277 mL, 1.986 mmol), and 1-hydroxybenzotriazole (0.215 g, 1.589 mmol) in dichloromathane (10.0 mL), at 0° C. under an argon atmosphere was added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.228 g, 1.191 mmol). The mixture was stirred at room temperature overnight. The reaction mixture was concentrated under reduced pressure, then extracted with ethyl acetate and water. The separated organic phase was washed with brine, dried over MgSO4, filtered, then concentrated under reduced pressure. The resulting residue was purified by column chromatography on Silica-gel (dichloromathane/methanol=19/1) to give tert-butyl 3-{2-amino-6-[2-(benzyloxy)phenyl]-3-[(methylamino)carbonyl]-4-pyridinyl}-1-piperidinecarboxylate as a yellow oil (0.11 g, 21%). The reaction mixture was concentrated under reduced pressure extracted with ethyl acetate and water The separated organic phase was washed with brine dried over MgSO4 filtered concentrated under reduced pressure The resulting residue was purified by column chromatography on Silica-gel (dichloromathane/methanol=19/1)

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

Procedure: A mixture of sodium cyanoborohydride (35.0 g, 0.557 mol) and zinc chloride (37.9 g, 0.278 mol) in methanol (500 mL) was added dropwise to a mechanically stirred mixture of 3-benzyl-3-azabicyclo[3.2.1]octan-8-one (Preparation A; 120 g, 0.557 mol) and methylamine hydrochloride (151 g, 2.23 mol) in methanol (1.0 L) at 25° C. under nitrogen. After 2.5 h of stirring, 6 N NaOH (90 mL) was added dropwise. The mixture was filtered through a pad of Celite®, washing with methanol (500 mL). The filtrate was concentrated in vacuo. Water (500 mL) was added, and the aqueous mixture was extracted with ethyl acetate (3×500 mL). The combined organic extracts were dried (Na2SO4), and concentrated in vacuo. The residue was chromatographed, eluting with methanol dichloromethane (1:10), to afford 63.0 g (49%) of the sub-title compound as a solid. Preparation A at 25° C. The mixture was filtered through a pad of Celite® washing with methanol (500 mL) The filtrate was concentrated in vacuo Water (500 mL) was added the aqueous mixture was extracted with ethyl acetate (3×500 mL) The combined organic extracts were dried (Na2SO4) concentrated in vacuo The residue was chromatographed eluting with methanol dichloromethane (1:10)

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

Procedure: To a stirred solution of 6-(4-nitrophenyl)-1H-indazole-3-carboxylic acid (140 mg, 0.5 mmol), methyl amine hydrochloride (45 mg, 0.6 mmol), HOBt (80 mg, 0.6 mmol), and triethylamine (0.3 Ml, 2 mmol) in N,N-dimethylformamide (5 Ml), was added EDCI (142 mg, 0.7 mmol). After the mixture was stirred at 70° C. for 12 h, the mixture was cooled to room temperature, and ethyl acetate and saturated sodium bicarbonate solution were added. The aqueous layer was extracted with ethyl acetate and the combined organic layer was dried over magnesium sulfate and concentrated under reduced pressure to give N-methyl-6-(4-nitrophenyl)-1H-indazole-3-carboxamide (70 mg). the mixture was cooled to room temperature The aqueous layer was extracted with ethyl acetate the combined organic layer was dried over magnesium sulfate concentrated under reduced pressure

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

Procedure: To a stirred solution of 6-(4-(3-(trifluoromethyl)benzamido)phenyl)-1H-indazole-3-carboxylic acid (26 mg, 61 μmol), methyl amine hydrochloride (6.2 mg, 92 μmol), HOBt (12 mg, 92 μmol), and triethylamine (43 μl, 0.3 mmol) in N,N-dimethylformamide (0.6 Ml), was added EDCI (18 mg, 92 μmol). After the mixture was stirred at 70° C. for 12 h, the mixture was cooled to room temperature, and ethyl acetate and saturated sodium bicarbonate solution were added. The aqueous layer was extracted with ethyl acetate and the combined organic layer was dried over magnesium sulfate and concentrated under reduced pressure. The residue was triturated in ethyl acetate/hexane to give N-methyl-6-(4-(3-(trifluoromethyl)benzamido)phenyl)-1H-indazole-3-carboxamide (20 mg). the mixture was cooled to room temperature The aqueous layer was extracted with ethyl acetate the combined organic layer was dried over magnesium sulfate concentrated under reduced pressure The residue was triturated in ethyl acetate/hexane