Methyl chloroformate → Trifluoroacetic acid

HRID 713309Notes

Reaction equation

HRID 713309 reaction equation
[OH:1][C:2]([C:4]([F:7])([F:6])[F:5])=[O:3].[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:23]=[C:22]3[CH2:24][NH:25][CH2:26][CH2:27][C:21]3=[N:20][C:19]=2[NH:28][CH:29]([CH3:31])[CH3:30])[CH2:14][CH2:13]1.C(N(CC)CC)C.[C:44](Cl)(=[O:47])[O:45][CH3:46]>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:23]=[C:22]3[CH2:24][N:25]([C:44]([O:45][CH3:46])=[O:47])[CH2:26][CH2:27][C:21]3=[N:20][C:19]=2[NH:28][CH:29]([CH3:31])[CH3:30])[CH2:16][CH2:17]1.[C:2]([OH:3])([C:4]([F:7])([F:6])[F:5])=[O:1]

Participants

6

Reactant 3

HCID 6586Methyl chloroformateHCID 8471TriethylamineHCID 1317340273-(4-(2,4-difluorophenoxy)piperidin-1-yl)-N-isopropyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt

Product 2

HCID 6422Trifluoroacetic acidYield 120.6%HCID 118159218Methyl 3-(4-(2,4-difluorophenoxy)piperidin-1-yl)-2-(isopropylamino)-7,8-dihydropyrido[3,4-b]pyrazine-6(5H)-carboxylate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 3-(4-(2,4-difluorophenoxyl)piperidin-1-yl)-N-isopropyl-5,6,7,8-tetrahydropyrido[3,4-b]pyrazin-2-amine TFA salt (50 mg, 0.080 mmol) and triethylamine (0.026 mL, 0.185 mmol) in DCM (0.75 mL) was added methyl carbonochloridate (9.3 μL, 0.121 mmol) at 0° C. The reaction mixture was stirred at 0° C. for 1 hr, warmed to 23° C., and concentrated via rotary evaporation. The resulting crude material was reconstituted in DMSO, rinsed with DMSO, and purified by HPLC Method B using a 30% to 70% ACN gradient to give the title compound as a TFA salt (11.0 mg, 23.8%) as a yellow solid. 1H NMR (500 MHz, DMSO-d6) δ ppm 1.18 (d, J=6.8 Hz, 6H), 1.82-1.94 (m, 2H), 2.02-2.12 (m, 2H), 2.65 (t, J=5.9 Hz, 2H), 2.83-2.93 (m, 2H), 3.21-3.33 (m, 2H), 3.63 (s, 3H), 3.64-3.68 (m, 2H), 4.06-4.17 (m, 1H), 4.34 (br s, 2H), 4.51 (tt, J=8.1, 3.9 Hz, 1H), 5.51-5.65 (m, 1H), 6.99-7.05 (m, 1H), 7.25-7.35 (m, 2H); ESI-MS m/z [M+H]+ 462.4.

Workup

  1. temperaturewarmed to 23° C.
  2. concentrationconcentrated via rotary evaporation
  3. washrinsed with DMSO
  4. custompurified by HPLC Method B

Sources & evidence

ORD record
ord-76f84e4e25c541499bef5a32026fb20a
Source dataset
uspto-grants-2015_11
Patent number
US09181249B2

Reaction notes

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