反应详情

5-(2-(2-Aminoethoxy)-5-(1-phenylcyclopropylcarbamoyl)phenyl)-2-(4-fluorophenyl)-N-methyl benzofuran-3-carboxamide, TFA. To a 2 dram vial was added 2-(4-fluorophenyl)-5-(2-hydroxy-5-(1-phenylcyclopropylcarbamoyl) phenyl)-N-methylbenzofuran-3-carboxamide (40.2 mg, 0.078 mmol) in 3 mL of DMF along with 3 eq. of 2-(2-bromoethyl)isoindoline-1,3-dione (58.8 mg, 0.232 mmol) and 4 eq. of DBU (1,8-diaza bicyclo[5.4.0]undec-7-ene, 0.046 mL, 0.308 mmol). The vial was capped and shaken at 75° C. over night. The crude reaction mixture was evaporated, taken up in 2 mL of acetonitrile and purified using a Shimadzu preparative HPLC employing acetonitrile/water/0.1% trifluoroacetic acid where solvent A was 10% acetonitrile/90% water/0.1% trifluoroacetic acid and solvent B was 10% water/90% acetonitrile/0.1% trifluoroacetic acid with a Xterra C18 19×100 mm column at a gradient of 25-100% B and a flow rate of 25 mL/min. over 12 minutes with a 8 minute hold. The solvent was evaporated yielding 10.7 mgs of the phthalimide intermediate as a white solid. The LC/MS data was obtained on a Shimadzu analytical LC/Micromass Platform LC (ESI+) at 220 nm using the following set of conditions: Sunfire 5 μm C18, 4.6×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 4 minutes with a 1 minute hold at a rate of 4 mL/minute. LCMS m/z 694.4 (M+H), Rt=3.128 min., 93.7% purity. To a small screw cap vial was added the phthalimide intermediate, 5-(2-(2-(1,3-dioxoisoindolin-2-yl)ethoxy)-5-(1-phenylcyclo-propylcarbamoyl)phenyl)-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide (10.7 mg, 0.015 mmol) in 2 mL of methanol and anhydrous hydrazine (0.780 μL, 0.025 mmol). The vial was placed in a pre-equilibrated oil bath set to 75° C. and the solution refluxed for 90 minutes. The product was cooled to room temperature and the solvent was evaporated. The resulting oil was diluted with 10 mL of DCM, washed with 1 mL of 0.5M NaOH and extracted. The solvent was evaporated and the crude product was taken up in 1.8 mL of acetonitrile and 200 μL of DMF and purified using a Shimadzu preparative HPLC employing acetonitrile/water/trifluoroacetic acid where solvent A was 10% acetonitrile/90% water/0.1% trifluoroacetic acid and solvent B was 10% water/90% acetonitrile/0.1% trifluoroacetic acid with a Sunfire C18 19×150 mm column at a gradient of 20-100% B and a flow rate of 20 mL/min. over 20 minutes with a 5 minute hold. The solvent was evaporated giving 7.0 mgs (14% yield, 2 steps) of 5-(2-(2-aminoethoxy)-5-(1-phenyl cyclopropylcarbamoyl)phenyl)-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide, TFA as a white solid. The LC/MS data was obtained on a Shimadzu analytical LC/Micromass Platform LC (ESI+) at 220 nm using the following set of conditions: Sunfire 5 μm C18, 4.6×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 4 minutes with a 1 minute hold at a rate of 4 mL/minute. HPLC purity was determined using a Shimadzu analytical LC at 254 nm and 256 nm with a Waters Sunfire C18 3.5 μm 4.6×150 mm column employing water/acetonitrile/0.1% trifluoroacetic acid with a gradient of 10-100% B (B=95% HPLC grade acetonitrile/0.1% trifluoroacetic acid/5% HPLC grade water), (A=95% HPLC grade water/0.1% trifluoroacetic acid/5% HPLC grade acetonitrile), in 10 minutes with a 10 minute hold at a rate of 1 mL/minute. The HPLC purity was then confirmed with an orthogonal solvent system and column using a Shimadzu analytical LC with a Gemini C18 3.0 μm 4.6×150 mm column employing water/methanol/10 mM ammonium bicarbonate with a gradient of 10-100% B (B=95% HPLC grade methanol/10 mM ammonium bicarbonate/5% HPLC grade water), (A=95% HPLC grade water/10 mM ammonium bicarbonate/5% HPLC grade methanol), in 10 minutes with a 10 minute hold at a rate of 1 mL/minute. 1H NMR (400 MHz, THF-d8) δ ppm 1.21-1.27 (m, 2 H), 1.28-1.35 (m, 2 H), 2.89 (d, J=4.77 Hz, 3 H), 3.39 (t, J=4.77 Hz, 2 H), 4.38 (t, J=5.02 Hz, 2 H), 7.05-7.13 (m, 1 H), 7.16-7.28 (m, 5H), 7.29-7.35 (m, 2 H), 7.49-7.60 (m, 2 H), 7.62 (br. s., 1 H), 7.87 (dd, J=8.53, 2.26 Hz, 1 H), 7.96-8.05 (m, 3 H), 8.07 (d, J=1.00 Hz, 1 H), 8.30 (s, 2 H). LCMS Rt=2.023 min., m/z 564.3 (M+H). HPLC Rt=6.931 min. (Sunfire C18), 100% purity and 11.423 min. (Gemini C18), 98.9% purity.

1. customThe LC/MS data was obtained on a Shimadzu analytical LC/Micromass Platform LC (ESI+) at 220 nm
2. customTo a small screw cap
3. customThe vial was placed in a pre-equilibrated oil bath
4. customset to 75° C.
5. temperaturethe solution refluxed for 90 minutes
6. customthe solvent was evaporated
7. additionThe resulting oil was diluted with 10 mL of DCM
8. washwashed with 1 mL of 0.5M NaOH
9. extractionextracted
10. customThe solvent was evaporated
11. custom200 μL of DMF and purified
12. customThe solvent was evaporated