Diisopropylethylamine → 2-(4-{4-[(5-chloro-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-yl)amino]-5-methoxy-2-nitrophenyl}piperazin-1-yl)-N,N-dimethylacetamide

HRID 1842717

Reaction equation

HRID 1842717 reaction equation
CCN(C(C)C)C(C)C.[Cl:10][C:11]1[C:12]([C:30]2[CH:31]=[N:32][N:33]3[CH:38]=[CH:37][CH:36]=[CH:35][C:34]=23)=[N:13][C:14]([NH:17][C:18]2[CH:23]=[C:22]([N+:24]([O-:26])=[O:25])[C:21](F)=[CH:20][C:19]=2[O:28][CH3:29])=[N:15][CH:16]=1.[CH3:39][N:40]([CH3:50])[C:41](=[O:49])[CH2:42][N:43]1[CH2:48][CH2:47][NH:46][CH2:45][CH2:44]1>FC(F)(F)CO>[Cl:10][C:11]1[C:12]([C:30]2[CH:31]=[N:32][N:33]3[CH:38]=[CH:37][CH:36]=[CH:35][C:34]=23)=[N:13][C:14]([NH:17][C:18]2[C:19]([O:28][CH3:29])=[CH:20][C:21]([N:46]3[CH2:45][CH2:44][N:43]([CH2:42][C:41]([N:40]([CH3:50])[CH3:39])=[O:49])[CH2:48][CH2:47]3)=[C:22]([N+:24]([O-:26])=[O:25])[CH:23]=2)=[N:15][CH:16]=1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 2758642N,N-dimethyl-2-(piperazin-1-yl)acetamideHCID 712393485-chloro-N-(4-fluoro-2-methoxy-5-nitrophenyl)-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-amine2×

Product 1

HCID 712407892-(4-{4-[(5-chloro-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-yl)amino]-5-methoxy-2-nitrophenyl}piperazin-1-yl)-N,N-dimethylacetamideYield 83%

Reagents, catalysts & solvents 1

HCID 64092,2,2-TrifluoroethanolSolvent

Conditions

Temperature
140 °C

Procedure

DIPEA (0.105 mL, 0.60 mmol) was added to a mixture of 5-chloro-N-(4-fluoro-2-methoxy-5-nitrophenyl)-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-amine (Intermediate 20, 207 mg, 0.5 mmol) and N,N-dimethyl-2-piperazin-1-ylacetamide (86 mg, 0.50 mmol) in 2,2,2-trifluoroethanol (2.5 mL). The mixture was heated in a microwave at 140° C. for 1 h then cooled to r.t. The mixture was purified directly by ion exchange chromatography, using an SCX column and eluting with 7M methanolic ammonia to provide crude product after concentration of appropriate fractions. Further purification by FCC, eluting with 0-5% CH3OH in CH2Cl2 gave the title compound (234 mg, 83%) as an orange foam; 1H NMR: (CDCl3) 2.71-2.78 (4H, m), 2.97 (3H, s), 3.09 (3H, s), 3.11-3.18 (4H, m), 3.26 (2H, s), 3.99 (3H, s), 6.66 (1H, s), 6.97 (1H, td), 7.35-7.42 (1H, m), 7.52 (1H, s), 8.41 (1H, s), 8.49 (1H, d), 8.56 (1H, d), 8.92 (1H, s), 9.02 (1H, s); m/z: ES+ MH+ 566.52.

Workup

  1. temperaturethen cooled to r.t
  2. customThe mixture was purified directly by ion exchange chromatography
  3. washeluting with 7M methanolic ammonia
  4. customto provide crude product after concentration of appropriate fractions
  5. customFurther purification by FCC
  6. washeluting with 0-5% CH3OH in CH2Cl2

Sources & evidence

ORD record
ord-a55d8c16b2d444b493a7419950fd6f77
Source dataset
uspto-grants-2015_02
Patent number
US08946235B2

Linked notes

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