Trifluoroacetic acid → 2-(4-fluorophenyl)-5-(5-(isobutylcarbamoyl)-2-(2-(morpholin-2-yl)ethoxy)phenyl)-N-methylbenzofuran-3-carboxamide

HRID 555126Notes

Reaction equation

HRID 555126 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:9][C:10]3[CH:20]=[CH:19][C:18]([C:21]4[CH:26]=[C:25]([C:27](=[O:33])[NH:28][CH2:29][CH:30]([CH3:32])[CH3:31])[CH:24]=[CH:23][C:22]=4[OH:34])=[CH:17][C:11]=3[C:12]=2[C:13]([NH:15][CH3:16])=[O:14])=[CH:4][CH:3]=1.C1CCN2C(=NCCC2)CC1.Br[CH2:47][CH2:48][CH:49]1[O:54][CH2:53][CH2:52][N:51](C(OC(C)(C)C)=O)[CH2:50]1.C(O)(C(F)(F)F)=O>CN(C=O)C>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[O:9][C:10]3[CH:20]=[CH:19][C:18]([C:21]4[CH:26]=[C:25]([C:27](=[O:33])[NH:28][CH2:29][CH:30]([CH3:32])[CH3:31])[CH:24]=[CH:23][C:22]=4[O:34][CH2:47][CH2:48][CH:49]4[O:54][CH2:53][CH2:52][NH:51][CH2:50]4)=[CH:17][C:11]=3[C:12]=2[C:13]([NH:15][CH3:16])=[O:14])=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 6422Trifluoroacetic acidHCID 811841,8-Diazabicyclo(5.4.0)undec-7-ene2×HCID 57850090Tert-butyl 2-(2-bromoethyl)morpholine-4-carboxylateHCID 592753492-(4-fluorophenyl)-5-(2-hydroxy-5-(isobutylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide

Product 1

HCID 592751682-(4-fluorophenyl)-5-(5-(isobutylcarbamoyl)-2-(2-(morpholin-2-yl)ethoxy)phenyl)-N-methylbenzofuran-3-carboxamideYield 34.9%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
85 °C

Procedure

To a 2 dram vial was added 2-(4-fluorophenyl)-5-(2-hydroxy-5-(isobutylcarbamoyl)phenyl)-N-methylbenzofuran-3-carboxamide (46.0 mg, 0.1 mmol), DMF (2 mL), 4.0 equivalents (60 μL, 0.400 mmol) of DBU, 1,8-Diazabicyclo[5.4.0]undec-7-ene (0.4 mmol) and 4.0 equivalents of tert-butyl 2-(2-bromoethyl)morpholine-4-carboxylate (236 mg, 0.400 mmol). The vial was capped and the reaction mixture heated for eighteen hours at 85° C. The crude product was 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 Waters Sunfire 5 μm C18 19×150 mm column at a gradient of 20-100% B and a flow rate of 25 mL/min. over 20 minutes with a 10 minute hold. The solvent mixture was removed on the rotovap and the resulting white solid (19.2 mgs) was taken up in 2 mL of dichloroethane containing 200 μL of trifluoroacetic acid. The acid mixture was stirred for 60 minutes. The volatiles were then removed, the process repeated again giving 20 mgs (29% yield, 2 steps) of 2-(4-fluorophenyl)-5-(5-(isobutylcarbamoyl)-2-(2-(morpholin-2-yl)ethoxy)phenyl)-N-methylbenzofuran-3-carboxamide, TFA as a white solid. The NMR spectrum was recorded at room temperature using a Bruker DRX400 spectrometer. The LC/MS data was obtained on a Shimadzu analytical LC/MICROMASS® Platform LC (ESI+) at 220 nm using the following set of conditions: PHENOMENEX® Luna 3 μm C18, 2×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade acetonitrile/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade acetonitrile), in 4 minutes with a 1 minute hold at a rate of 0.8 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 Waters XBridge phenyl C18 3.5 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 0.93 (d, J=6.53 Hz, 6H), 1.87 (m, 3H), 2.90 (d, J=4.77 Hz, 3H), 3.08-3.12 (m, 2H), 3.16-3.20 (m, 2H), 3.31 (d, J=9.54 Hz, 2H), 3.95-4.11 (m, 3H), 4.23-4.31 (m, 1H), 4.35 (br. s., 1H), 7.08 (d, J=8.78 Hz, 1H), 7.25 (t, J=8.66 Hz, 2H), 7.45 (dd, J=8.53, 1.76 Hz, 1H), 7.54 (t, J=5.65 Hz, 1H), 7.62 (d, J=8.53 Hz, 1H), 7.84 (dd, J=8.53, 2.26 Hz, 1H), 7.88 (d, J=2.01 Hz, 1H), 7.91 (d, J=4.02 Hz, 1H), 7.98-8.07 (m, 3H). LCMS m/z 574.5 (M+H), Rt=2.390 min. HPLC (Sunfire C18) Rt=6.870 min., 99.3% purity and (XBridge phenyl C18) Rt=10.973 min., 99.2% purity.

Workup

  1. customThe vial was capped
  2. customThe crude product was purified
  3. customThe solvent mixture was removed on the rotovap
  4. customThe volatiles were then removed

Sources & evidence

ORD record
ord-0279e3b74b2b4e5d87e24b1988a0e0ba
Source dataset
uspto-grants-2011_11
Patent number
US08048887B2

Reaction notes

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