Diisopropylethylamine → Trifluoroacetic acid

HRID 713347Notes

Reaction equation

HRID 713347 reaction equation
[OH:1][C:2]([C:4]([F:7])([F:6])[F:5])=[O:3].[F:8][CH:9]([F:38])[CH2:10][NH:11][C:12]1[N:13]=[C:14]2[CH2:36][CH:35]([CH3:37])[NH:34][CH2:33][C:15]2=[N:16][C:17]=1[N:18]1[CH2:23][CH2:22][CH:21]([O:24][C:25]2[CH:30]=[CH:29][C:28]([F:31])=[CH:27][C:26]=2[F:32])[CH2:20][CH2:19]1.[CH3:39][O:40][CH2:41][C:42](Cl)=[O:43].CCN(C(C)C)C(C)C>C(Cl)Cl.CN(C=O)C>[F:38][CH:9]([F:8])[CH2:10][NH:11][C:12]1[N:13]=[C:14]2[CH2:36][CH:35]([CH3:37])[N:34]([C:42](=[O:43])[CH2:41][O:40][CH3:39])[CH2:33][C:15]2=[N:16][C:17]=1[N:18]1[CH2:19][CH2:20][CH:21]([O:24][C:25]2[CH:30]=[CH:29][C:28]([F:31])=[CH:27][C:26]=2[F:32])[CH2:22][CH2:23]1.[C:2]([OH:3])([C:4]([F:7])([F:6])[F:5])=[O:1]

Participants

7

Reactant 3

HCID 81531DiisopropylethylamineHCID 96623Methoxyacetyl chlorideHCID 131734043N-(2,2-difluoroethyl)-3-(4-(2,4-difluorophenoxy)piperidin-1-yl)-7-methyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt

Product 2

HCID 6422Trifluoroacetic acidYield 194.9%HCID 118159295HCID 118159295, compound

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A solution of N-(2,2-difluoroethyl)-3-(4-(2,4-difluorophenoxyl)piperidin-1-yl)-7-methyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt (10 mg, 0.018 mmol), 2-methoxyacetyl chloride (2.9 mg, 0.027 mmol), and DIPEA (7.0 mg, 0.054 mmol) in DCM (90 μL) was stirred at room temperature for 2 h. The crude reaction mixture was diluted in DMF, filtered through a hydrophilic PTFE 0.45 μm filter (Millipore® Millex-LCR), and purified via HPLC Method A to give the title compound as a TFA salt (4 mg) as a white solid. 1H NMR (400 MHz, methanol-d4, mixture of rotamers) δ ppm 1.16 (d, J=6.8 Hz, 1.4H), 1.24 (d, J=6.6 Hz, 1.6H), 1.91-2.04 (m, 2H), 2.09-2.19 (m, 2H), 2.59 (dd, J=16.9, 10.6 Hz, 1H), 2.97-3.00 (m, 2.4H), 3.09-3.15 (m, 0.6H), 3.35-3.41 (m, 2H), 3.43 (s, 3H), 3.78 (td, J=14.6, 4.3 Hz, 2H), 4.03 (d, J=17.9 Hz, 0.6H), 4.19-4.27 (m, 1.4H), 4.29-4.39 (m, 1H), 4.46-4.52 (m, 1.5H), 4.58-4.62 (m, 0.5H), 5.07 (d, J=18.8 Hz, 0.5H), 5.18 (t, J=5.3 Hz, 0.5H), 5.89-6.22 (m, 1H), 6.85-6.91 (m, 1H), 6.99 (ddd, J=11.2, 8.5, 3.0 Hz, 1H), 7.18 (td, J=9.2, 5.6 Hz, 1H); ESI-MS m/z [M+H]+ 511.9.

Workup

  1. customThe crude reaction mixture
  2. filtrationfiltered through a hydrophilic PTFE 0.45 μm
  3. filtrationfilter (Millipore® Millex-LCR)
  4. custompurified via HPLC Method A

Sources & evidence

ORD record
ord-b7ba8fc9594345648fb7f2e8c3789587
Source dataset
uspto-grants-2015_11
Patent number
US09181249B2

Reaction notes

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