2-甲基-5-氨基苯并呋喃

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 35° C. mixture of 50 g of 2-methyl-5-nitrobenzofuran, ethanol (250 mL), THF (250 mL) and wet 10% Pd/C (4 g) was added ammonium formate (53.4 g, 0.85 mol) over 50 min. After an additional 4 h, the reaction was cooled to room temperature and filtered through Celite. The filtrate was concentrated and the residue was taken up in methyl t-butyl ether. This mixture was filtered, concentrated and dried to provide 2-methyl-5-benzofuranamine which was converted to its hydrochloride salt or its oxalate salt. The oxalate was prepared as follows: To a solution of 2-methyl-5-benzofuranamine in TBME (415 mL) was added a solution of oxalic acid (25.4 g) in methanol (80 mL) dropwise. The precipitate was stirred for 2 h, collected, washed with methanol/TBME and dried to provide 2-methyl-5-benzofuranamine oxalate. filtered through Celite The filtrate was concentrated This mixture was filtered concentrated dried

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 35° C. mixture of 50 g of 2-methyl-5-nitrobenzofuran, ethanol (250 mL), THF (250 mL) and wet 10% Pd/C (4 g) was added ammonium formate (53.4 g, 0.85 mol) over 50 min. After an additional 4 h, the reaction was cooled to room temperature and filtered through Celite. The filtrate was concentrated and the residue was taken up in methyl t-butyl ether. This mixture was filtered, concentrated and dried to provide 2-methyl-5-benzofuranamine which was converted to its hydrochloride salt or its oxalate salt. The oxalate was prepared as follows: To a solution of 2-methyl-5-benzofuranamine in TBME (415 mL) was added a solution of oxalic acid (25.4 g) in methanol (80 mL) dropwise. The precipitate was stirred for 2 h, collected, washed with methanol/TBME and dried to provide 2-methyl-5-benzofuranamine oxalate. filtered through Celite The filtrate was concentrated This mixture was filtered concentrated dried

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 2-methyl-5-nitro-benzofuran [19] (125 mg, 0.706 mmol) in methanol (20 mL) was added 5% palladium on carbon (20 mg) and the mixture was stirred under 1 atm H2 for 4 h. The mixture was filtered through celite and the filtrate evaporated. The residue was passed through a silica plug to afford 5-amino-2-methyl benzofuran as a red-brown oil (78 mg, 75%), single spot at Rf 0.45 (1:1 hexane:ethyl acetate). 1H NMR (CDCl3): δ 7.17 (1H, d, J=8.7 Hz), 6.75 (1H, d, J=2.5 Hz), 6.57 (1H, dd, J8.7, 2.5 Hz), 6.20 (1H, s), 3.53 (2H, s, NH2), 2.39 (3 H, s). The mixture was filtered through celite the filtrate evaporated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Preparation of title compound. A solution of 2-methyl-5-benzofuranamine (32 mg, 0.22 mmol) and 3,3-bis(methylthio)-2-cyanoacrylamide (41 mg, 0.22 mmol) in ethanol (0.35 mL) was stirred at 80° C. After stirring for 5 h, a solution of 3-aminohexahydro-1-phenylmethyl-2H-azepin-2-one (74 mg, 0.29 mmol) in ethanol (0.74 mL) was added. After stirring at 80° C. for 2 days, the reaction was purified by column chromatography (silica, 1% methanol/dichloromethane) to afford the title compound (37 mg, 37% yield): MS (ESI, pos. ion spectrum) m/z 458; HPLC (method A) tR 4.13 min. After stirring at 80° C. for 2 days the reaction was purified by column chromatography (silica, 1% methanol/dichloromethane)

反应条件: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 2-methyl-5-benzofuranamine (0.24 mmol), 1,1-bis(methylthio)-2-nitroethylene (40 mg, 0.24 mmol) and triethylamine (0.035 mL, 0.25 mmol) in ethanol (0.35 mL) was stirred at 80° C. for 2 h. To the mixture was added 1-[(3-amino-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepin-1-yl)acetyl]pyrrolidine (70 mg, 0.24 mmol) and the resulting reaction was stirred at 80° C. overnight. The reaction mixture was purified by column chromatography (silica, 3% methanol/ethyl acetate) to provide the title compound (29 mg, 24% yield): MS (ESI, pos. ion spectrum) m/z 504; HPLC (method A) tR 3.67 min. the resulting reaction The reaction mixture was purified by column chromatography (silica, 3% methanol/ethyl acetate)

反应条件: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Preparation of title compound. A solution of 2-methyl-5-benzofuranamine (0.24 mmol), 1,1-bis(methylthio-2,2-dicyanoethylene (34 mg, 0.20 mmol) and triethylamine (0.035 mL, 0.25 mmol) in ethanol (0.35 mL) was stirred at 80° C. for 4 h. To the mixture was added 1-[(3-amino-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepin-1-yl)acetyl]pyrrolidine (70 mg, 0.24 mmol) and the resulting reaction was stirred at 80° C. overnight. The reaction mixture was purified by column chromatography (silica, 5% methanol/ethyl acetate) to afford the title compound (3 mg, 3% yield): MS (ESI, pos. ion spectrum) m/z 509; HPLC (method A) tR 3.80 min. the resulting reaction The reaction mixture was purified by column chromatography (silica, 5% methanol/ethyl acetate)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 35° C. mixture of 50 g of 2-methyl-5-nitrobenzofuran, ethanol (250 mL), THF (250 mL) and wet 10% Pd/C (4 g) was added ammonium formate (53.4 g, 0.85 mol) over 50 min. After an additional 4 h, the reaction was cooled to room temperature and filtered through Celite. The filtrate was concentrated and the residue was taken up in methyl t-butyl ether. This mixture was filtered, concentrated and dried to provide 2-methyl-5-benzofuranamine which was converted to its hydrochloride salt or its oxalate salt. The oxalate was prepared as follows: To a solution of 2-methyl-5-benzofuranamine in TBME (415 mL) was added a solution of oxalic acid (25.4 g) in methanol (80 mL) dropwise. The precipitate was stirred for 2 h, collected, washed with methanol/TBME and dried to provide 2-methyl-5-benzofuranamine oxalate. filtered through Celite The filtrate was concentrated This mixture was filtered concentrated dried