Cyclopentylamine → N-cyclopentyl-3-[2-(cyclopentylamino)-4-pyrimidinyl]-2-(3-methylphenyl)pyrazolo[1,5-a]pyridin-7-amine

HRID 861145Notes

Reaction equation

HRID 861145 reaction equation
Cl[C:2]1[N:7]2[N:8]=[C:9]([C:23]3[CH:28]=[CH:27][CH:26]=[C:25]([CH3:29])[CH:24]=3)[C:10]([C:11]3[CH:16]=[CH:15][N:14]=[C:13]([NH:17][CH:18]4[CH2:22][CH2:21][CH2:20][CH2:19]4)[N:12]=3)=[C:6]2[CH:5]=[CH:4][CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(=O)([O-])[O-].[Cs+].[Cs+].CCOCC.[CH:87]1([NH2:92])[CH2:91][CH2:90][CH2:89][CH2:88]1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH:87]1([NH:92][C:2]2[N:7]3[N:8]=[C:9]([C:23]4[CH:28]=[CH:27][CH:26]=[C:25]([CH3:29])[CH:24]=4)[C:10]([C:11]4[CH:16]=[CH:15][N:14]=[C:13]([NH:17][CH:18]5[CH2:22][CH2:21][CH2:20][CH2:19]5)[N:12]=4)=[C:6]3[CH:5]=[CH:4][CH:3]=2)[CH2:91][CH2:90][CH2:89][CH2:88]1

Participants

7

Reactant 5

HCID 2906CyclopentylamineHCID 3283Diethyl EtherHCID 10796Cesium carbonateHCID 634876Binap, (A+-)-HCID 865967674-[7-chloro-2-(3-methylphenyl)pyrazolo[1,5-a]pyridin-3-yl]-N-cyclopentyl-2-pyrimidinamine

Product 1

HCID 10297787N-cyclopentyl-3-[2-(cyclopentylamino)-4-pyrimidinyl]-2-(3-methylphenyl)pyrazolo[1,5-a]pyridin-7-amineYield 64%

Reagents, catalysts & solvents 1

HCID 167845palladium(II) acetateCatalyst

Procedure

To a solution of 4-[7-chloro-2-(3-methylphenyl)pyrazolo[1,5-a]pyridin-3-yl]-N-cyclopentyl-2-pyrimidinamine (500 mg, 1.24 mmol) in cyclopentylamine (50 mL) was added successively racemic-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (308 mg, 0.49 mmol), cesium carbonate (0.81 g, 2.47 mmol) and palladium (II) acetate (70 mg, 0.31 mmol). The resultant mixture was heated to 95° C. for 18 hours at which time the reaction was judged complete by thin layer chromatography. The solution was cooled to room temperature and ether was added. The organic layer was washed with water and brine. The aqueous layer was extracted with ether and the combined organics dried over magnesium sulfate. Filtration and concentration, followed by flash chromatography (4:1 hexanes:ethyl acetate) provided N-cyclopentyl-3-[2-(cyclopentylamino)-4-pyrimidinyl]-2-(3-methylphenyl)pyrazolo[1,5-a]pyridin-7-amine (360 mg, 64%) as a yellow foam. 1H NMR (CDCl3) δ 7.94 (d, 1H), 7.79 (d, 1H), 7.46 (s, 1H), 7.40 (d, 1H), 7.34–7.29 (m, 2H), 7.24 (d, 1H), 6.27 (d, 1H), 6.03 (m, 2H), 5.12 (broad s, 1H), 4.35 (m, 1H), 3.99 (m, 1H), 2.40 (s, 3H), 2.14–2.04 (m, 4H), 1.81–1.52 (m, 12H); MS m/z 453 (M+1).

Workup

  1. washThe organic layer was washed with water and brine
  2. extractionThe aqueous layer was extracted with ether
  3. dry with materialthe combined organics dried over magnesium sulfate
  4. filtrationFiltration and concentration

Sources & evidence

ORD record
ord-5112672cbfa04abea08491bbe8be2eb5
Source dataset
uspto-grants-2006_12
Patent number
US07153855B2

Reaction notes

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