Triethylamine → Trifluoroacetic acid

HRID 713291Notes

Reaction equation

HRID 713291 reaction equation
[OH:1][C:2]([C:4]([F:7])([F:6])[F:5])=[O:3].[F:8][C:9]1[CH:10]=[C:11]([CH:14]=[CH:15][C:16]=1[O:17][CH:18]1[CH2:23][CH2:22][N:21]([C:24]2[N:29]=[C:28]3[CH2:30][NH:31][CH2:32][CH2:33][C:27]3=[N:26][C:25]=2[NH:34][CH:35]([CH3:37])[CH3:36])[CH2:20][CH2:19]1)[C:12]#[N:13].C(N(CC)CC)C.[CH3:45][S:46](Cl)(=[O:48])=[O:47]>C(Cl)Cl>[F:8][C:9]1[CH:10]=[C:11]([CH:14]=[CH:15][C:16]=1[O:17][CH:18]1[CH2:19][CH2:20][N:21]([C:24]2[N:29]=[C:28]3[CH2:30][N:31]([S:46]([CH3:45])(=[O:48])=[O:47])[CH2:32][CH2:33][C:27]3=[N:26][C:25]=2[NH:34][CH:35]([CH3:37])[CH3:36])[CH2:22][CH2:23]1)[C:12]#[N:13].[C:2]([OH:3])([C:4]([F:7])([F:6])[F:5])=[O:1]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 118159356HCID 118159356, compound

Product 2

HCID 6422Trifluoroacetic acidYield 32.7%HCID 118159410HCID 118159410, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 3-fluoro-4-((1-(2-(isopropylamino)-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-3-yl)piperidin-4-yl)oxy)benzonitrile TFA salt (98.6 mg, 0.094 mmol) and triethylamine (0.039 mL, 0.283 mmol) in DCM (1.0 mL) was added methanesulfonyl chloride (10.9 μL, 0.141 mmol) at 0° C. The mixture was stirred at 0° C. for 30 min and then concentrated via rotary evaporation. The crude material was diluted with DMSO, filtered, rinsed with DMSO, and purified by HPLC Method B, with the exception that a Waters XSelect® CSH C18, 5 μm, ID 4.6×50 mm was used, using an ACN gradient of 30% to 70% to give the title compound as a TFA salt (3.5 mg, 6.2%) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.18 (d, J=6.3 Hz, 6H), 1.88-1.96 (m, 2H), 2.09-2.16 (m, 2H), 2.76 (t, J=5.9 Hz, 2H), 2.89-2.96 (m, 2H), 2.97 (s, 3H), 3.24-3.30 (m, 2H), 3.45 (t, J=5.9 Hz, 2H), 4.10-4.16 (m, 3H), 4.81-4.85 (m, 1H), 5.66 (d, J=8.3 Hz, 1H), 7.50 (t, J=8.7 Hz, 1H), 7.68 (ddd, J=8.6, 2.0, 1.3 Hz, 1H), 7.86 (dd, J=11.4, 2.0 Hz, 1H); ESI-MS m/z [M+H]+ 489.5.

Workup

  1. concentrationconcentrated via rotary evaporation
  2. additionThe crude material was diluted with DMSO
  3. filtrationfiltered
  4. washrinsed with DMSO
  5. custompurified by HPLC Method B, with the exception that a Waters XSelect® CSH C18, 5 μm, ID 4.6×50 mm

Sources & evidence

ORD record
ord-0fececb7e5894ba78e454812236c3151
Source dataset
uspto-grants-2015_11
Patent number
US09181249B2

Reaction notes

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