Diisopropylethylamine → N-{4-[(3R)-3-dimethylaminopyrrolidin-1-yl]-2-methoxy-5-nitrophenyl}-4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-amine

HRID 1842788Notes

Reaction equation

HRID 1842788 reaction equation
[CH3:1][N:2]([CH3:8])[C@@H:3]1[CH2:7][CH2:6][NH:5][CH2:4]1.F[C:10]1[C:15]([N+:16]([O-:18])=[O:17])=[CH:14][C:13]([NH:19][C:20]2[N:25]=[C:24]([C:26]3[CH:27]=[N:28][N:29]4[CH2:34][CH2:33][CH2:32][CH2:31][C:30]=34)[CH:23]=[CH:22][N:21]=2)=[C:12]([O:35][CH3:36])[CH:11]=1.CCN(C(C)C)C(C)C>CC(N(C)C)=O>[CH3:1][N:2]([CH3:8])[C@@H:3]1[CH2:7][CH2:6][N:5]([C:10]2[C:15]([N+:16]([O-:18])=[O:17])=[CH:14][C:13]([NH:19][C:20]3[N:25]=[C:24]([C:26]4[CH:27]=[N:28][N:29]5[CH2:34][CH2:33][CH2:32][CH2:31][C:30]=45)[CH:23]=[CH:22][N:21]=3)=[C:12]([O:35][CH3:36])[CH:11]=2)[CH2:4]1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 2758521(3R)-(+)-3-(Dimethylamino)pyrrolidineHCID 71240760N-(4-fluoro-2-methoxy-5-nitrophenyl)-4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-amine2×

Product 1

HCID 71270213N-{4-[(3R)-3-dimethylaminopyrrolidin-1-yl]-2-methoxy-5-nitrophenyl}-4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-amineYield 79.2%

Reagents, catalysts & solvents 1

HCID 31374DimethylacetamideSolvent

Conditions

Temperature
140 °C

Procedure

(3R)—N,N-Dimethylpyrrolidin-3-amine (64 mg, 0.56 mmol), N-(4-fluoro-2-methoxy-5-nitrophenyl)-4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-amine (Intermediate 127, 267 mg, 0.53 mmol) and DIPEA (0.186 mL, 1.07 mmol) were suspended in DMA (2 mL), sealed into a microwave tube and then heated to 140° C. for 1 h in a microwave reactor. After cooling to r.t. the mixture was part-purified by ion exchange chromatography, using an SCX column. The column was first washed with CH3OH and then eluted with 0.7M methanolic ammonia. Clean fractions were concentrated in vacuo to give crude material as an orange gum. Purification by FCC, eluting with 0-5% 7N methanolic ammonia in CH2Cl2 gave the title compound (201 mg, 79%) as a orange gum; 1H NMR (CDCl3): 1.89-1.98 (3H, m), 2.05-2.12 (2H, m), 2.16-2.23 (1H, m), 2.30 (6H, s), 2.78-2.87 (1H, m), 3.14-3.37 (5H, m), 3.54 (1H, td), 3.96 (3H, s), 4.20 (2H, t), 6.34 (1H, s), 6.85 (1H, d), 7.33 (1H, s), 7.95 (1H, s), 8.30 (1H, d), 8.95 (1H, s); m/z: ES+ MH+ 479.60.

Workup

  1. customsealed into a microwave tube
  2. temperatureAfter cooling to r.t. the mixture
  3. customwas part-purified by ion exchange chromatography
  4. washThe column was first washed with CH3OH
  5. washeluted with 0.7M methanolic ammonia
  6. concentrationwere concentrated in vacuo
  7. customto give crude material as an orange gum
  8. customPurification by FCC
  9. washeluting with 0-5% 7N methanolic ammonia in CH2Cl2

Sources & evidence

ORD record
ord-d07b94aefcfc4b80898429693bdd7970
Source dataset
uspto-grants-2015_02
Patent number
US08946235B2

Reaction notes

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