Triethylamine → 1-(2-(4-(2,4-difluorophenoxy)piperidin-1-yl)-3-(isopropylamino)-7,8-dihydropyrido[3,4-b]pyrazin-6(5H)-yl)-2-methoxyethan-1-one

HRID 713269Notes

Reaction equation

HRID 713269 reaction equation
OC(C(F)(F)F)=O.[F:8][C:9]1[CH:35]=[C:34]([F:36])[CH:33]=[CH:32][C:10]=1[O:11][CH:12]1[CH2:17][CH2:16][N:15]([C:18]2[N:19]=[C:20]3[CH2:31][CH2:30][NH:29][CH2:28][C:21]3=[N:22][C:23]=2[NH:24][CH:25]([CH3:27])[CH3:26])[CH2:14][CH2:13]1.C(N(CC)CC)C.[CH3:44][O:45][CH2:46][C:47](Cl)=[O:48]>C(Cl)Cl>[F:8][C:9]1[CH:35]=[C:34]([F:36])[CH:33]=[CH:32][C:10]=1[O:11][CH:12]1[CH2:13][CH2:14][N:15]([C:18]2[N:19]=[C:20]3[CH2:31][CH2:30][N:29]([C:47](=[O:48])[CH2:46][O:45][CH3:44])[CH2:28][C:21]3=[N:22][C:23]=2[NH:24][CH:25]([CH3:27])[CH3:26])[CH2:16][CH2:17]1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 96623Methoxyacetyl chlorideHCID 1317340252-(4-(2,4-difluorophenoxy)piperidin-1-yl)-N-isopropyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-3-amine TFA salt

Product 1

HCID 1181593761-(2-(4-(2,4-difluorophenoxy)piperidin-1-yl)-3-(isopropylamino)-7,8-dihydropyrido[3,4-b]pyrazin-6(5H)-yl)-2-methoxyethan-1-one

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 2-(4-(2,4-difluorophenoxyl)piperidin-1-yl)-N-isopropyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-3-amine TFA salt (39.0 mg, 0.075 mmol) in DCM (754 μL) at 0° C. was added triethylamine (31.5 μL, 0.226 mmol) and 2-methoxyacetyl chloride (13.8 μL, 0.151 mmol). The reaction was stirred at 0° C. for 30 min. The reaction mixture was concentrated under reduced pressure and was purified by HPLC Method B, with the exception that a Waters SunFire™ C18, 5 μm, ID 30×75 mm column was used, using a 55% to 80% ACN gradient to give the title compound, as a TFA salt, as a yellow oil (14.0 mg, 31.5%). 1H NMR (400 MHz, methanol-d4, mixture of rotamers) δ ppm 1.30 (m, 6H), 1.96 (m, 2H), 2.13 (m, 2H), 2.75 (t, J=5.7 Hz, 0.7H), 2.83 (t, J=5.7 Hz, 1.3H), 3.08 (m, 2H), 3.44 (m, 5H), 3.77 (t, J=5.8 Hz, 1.3H), 3.88 (t, J=5.9 Hz, 0.7H), 4.14 (m, 1H), 4.24 (s, 0.7H), 4.28 (s, 1.3H), 4.49 (td, J=7.1, 3.5 Hz, 1H), 4.56 (s, 0.7H), 4.63 (s, 1.3H), 6.88 (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]+ 476.5.

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. customwas purified by HPLC Method B, with the exception that a Waters SunFire™ C18, 5 μm, ID 30×75 mm column

Sources & evidence

ORD record
ord-1c6bf2883316435f980321d965714f5c
Source dataset
uspto-grants-2015_11
Patent number
US09181249B2

Reaction notes

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