1-(furan-2-yl)-N-methylmethanamine

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

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

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

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: To an ice-cold, stirred solution of methyl 3-(hydroxymethyl)-5-methylbenzoate (200 mg, 1.1 mmol) in methylene chloride (2.2 mL) is added triethylamine (0.304 mL, 2.2 mmol) followed by methanesulfonyl chloride (0.116 mL, 1.5 mmol). The reaction mixture is stirred for 15 min and filtered. N-Methylfurfurylamine (367 mg, 3.3 mmol) is added to the filtrate and the reaction mixture is stirred at room temperature for 5 h. The reaction mixture is diluted with methylene chloride (10 mL), washed with 1 N hydrochloric acid, and saturated sodium bicarbonate, dried (magnesium sulfate), filtered, and concentrated under reduced pressure. Purification by flash column chromatography (silica, 50% ethyl acetate/hexanes) provided the title compound. 1H NMR (300 MHz, CDCl3) δ 7.76 (d, J=11 Hz, 2H), 3.79 (d, J=6 Hz, 2H), 6.32 (d, J=2 Hz, 1H), 6.21 (d, J=3 Hz, 1H), 3.90 (s, 3H), 3.59 (s, 3H), 3.53 (s, 2H), 2.39 (s, 3H), 2.23 (s, 3H). filtered the reaction mixture is stirred at room temperature for 5 h washed with 1 N hydrochloric acid, and saturated sodium bicarbonate dried (magnesium sulfate) filtered concentrated under reduced pressure Purification by flash column chromatography (silica, 50% ethyl acetate/hexanes)

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

Procedure: To a solution of 1-(furan-2-yl)-N-methylmethanamine (195 mg, 1.76 mmol), (S)-3-(biphenyl-4-yl)-2-(tert-butoxycarbonylamino)propanoic acid (500 mg, 1.45 mmol), in CH2Cl2 (3 mL) and DMF (3 mL) was added TEA (0.61 mL, 4.39 mmol) and HATU (724 mg, 1.90 mmol). The mixture was stirred at room temperature for 1 hour. The mixture was quenched with aq. NaHCO3 and extracted with EtOAc. The organic layer was washed with aq. NaHCO3, water, and brine. The organic layer was dried over MgSO4, filtered and concentrated under reduced pressure. The obtained residue was purified by silica gel chromatography using 30%-EtOAc/heptane to 90% EtOAc/heptane to give (S)-tert-butyl 3-(biphenyl-4-yl)-1-((furan-2-ylmethyl)(methyl)amino)-1-oxopropan-2-ylcarbamate (614 mg). HPLC retention time=1.80 minutes (condition B); MS (m+1)=435.1; 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.31 (s, 9H, minor rotamer), 1.34 (s, 9H, major rotamer), 2.61 (s, 3H, major rotamer), 2.83 (s, 3H, minor rotamer), 2.87-2.98 (m, 4H), 4.15-4.32 (m, 2H, minor isomer), 4.20 (d, J=15.1 Hz, 1H, major rotamer), 4.62 (d, J=15.1 Hz, 1H, major rotamer), 4.77 (q, J=7.3 Hz, 1H, major rotamer), 4.95 (q, J=7.3 Hz, 1H, minor rotamer), 5.30 (d, J=8.6 Hz, 1H, minor rotamer), 5.39 (d, J=8.6 Hz, 1H, major rotamer), 6.05 (d, J=2.8 Hz, 1H, minor rotamer), 6.10 (d, J=2.8 Hz, 1H, major rotamer), 6.18 (br. s., 1H, minor rotamer), 6.23 (dd, J=3.2, 1.9 Hz, 1H, major rotamer), 7.10-7.50 (m, 18H). The mixture was quenched with aq. NaHCO3 extracted with EtOAc The organic layer was washed with aq. NaHCO3, water, and brine The organic layer was dried over MgSO4 filtered concentrated under reduced pressure The obtained residue was purified by silica gel chromatography

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

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: This compound was prepared according to the method described in Example 2 by employing 4-chloro-2-methyl-6-phenylpyrrolo[3,2-d]pyrimidine (Example 1(e)) (70.0 mg, 0.29 mmol), N-methylfurfurylamine (The Sigma-Aldrich Library of Rare Chemicals) (0.16 g, 1.44 mmol) and K2CO3 (0.40 g, 2.87 mmol) in H2O (2 mL). The crude material was purified by preparative TLC on silica gel with 1:1 EtOAc:hexanes as eluant to give 53.6 mg (59%) of the title compound as an off-white solid. An analytical sample was obtained by recrystallization from EtOAc. Mp: 168-169° C. 1H NMR (CDCl3; 500 MHz): δ 2.62 (s, 3), 3.35 (s, 3), 4.83 (s, 2), 6.42-6.44 (m, 2), 6.79 (s, 1), 7.36-7.48 (m, 4), 7.64 (d, 2, J=7.2), 8.91 (br s, 1). MS m/z: 319.5 (M+1), 317.0 (M−1). HRMS: Calcd for M+H: 319.1559. Found: 319.1566. This compound was prepared The crude material was purified by preparative TLC on silica gel with 1:1 EtOAc

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

Procedure: To an ice-cold, stirred solution of methyl 3-(hydroxymethyl)-5-methylbenzoate (200 mg, 1.1 mmol) in methylene chloride (2.2 mL) is added triethylamine (0.304 mL, 2.2 mmol) followed by methanesulfonyl chloride (0.116 mL, 1.5 mmol). The reaction mixture is stirred for 15 min and filtered. N-Methylfurfurylamine (367 mg, 3.3 mmol) is added to the filtrate and the reaction mixture is stirred at room temperature for 5 h. The reaction mixture is diluted with methylene chloride (10 mL), washed with 1 N hydrochloric acid, and saturated sodium bicarbonate, dried (magnesium sulfate), filtered, and concentrated under reduced pressure. Purification by flash column chromatography (silica, 50% ethyl acetate/hexanes) provided the title compound. 1H NMR (300 MHz, CDCl3) δ 7.76 (d, J=11 Hz, 2H), 3.79 (d, J=6 Hz, 2H), 6.32 (d, J=2 Hz, 1H), 6.21 (d, J=3 Hz, 1H), 3.90 (s, 3H), 3.59 (s, 3H), 3.53 (s, 2H), 2.39 (s, 3H), 2.23 (s, 3H). filtered the reaction mixture is stirred at room temperature for 5 h washed with 1 N hydrochloric acid, and saturated sodium bicarbonate dried (magnesium sulfate) filtered concentrated under reduced pressure Purification by flash column chromatography (silica, 50% ethyl acetate/hexanes)