Cesium carbonate → 4-[2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purin-8-yl]piperidine-1-carboxylic acid tert-butyl ester

HRID 1923290Notes

Reaction equation

HRID 1923290 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]2[N:15]([CH3:30])[C:16]3[C:21]([N:22]=2)=[C:20]([N:23]2[CH2:28][CH2:27][O:26][CH2:25][CH2:24]2)[N:19]=[C:18](Cl)[N:17]=3)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH2:31]([C:33]1[NH:34][C:35]2[CH:41]=[CH:40][CH:39]=[CH:38][C:36]=2[N:37]=1)[CH3:32].CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.CCOC(C)=O.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[CH2:31]([C:33]1[N:34]([C:18]2[N:17]=[C:16]3[C:21]([N:22]=[C:14]([CH:11]4[CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])[CH2:9][CH2:10]4)[N:15]3[CH3:30])=[C:20]([N:23]3[CH2:28][CH2:27][O:26][CH2:25][CH2:24]3)[N:19]=2)[C:35]2[CH:41]=[CH:40][CH:39]=[CH:38][C:36]=2[N:37]=1)[CH3:32]

Participants

8

Reactant 4

HCID 10796Cesium carbonateHCID 158072-EthylbenzimidazoleHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 596059154-(2-chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-yl)piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 596062024-[2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purin-8-yl]piperidine-1-carboxylic acid tert-butyl esterYield 83.1%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of 4-(2-chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-yl)piperidine-1-carboxylic acid tert-butyl ester (375 mg, 0.858 mmol), 2-ethylbenzimidazole (151 mg, 1.03 mmol), Xphos (43 mg, 0.09 mmol) and Cs2CO3 (421 mg, 1.29 mmol) in dioxane (5 mL) was degassed with nitrogen bubbling for 15 minutes. Tris(dibenzylideneacetone)dipalladium (20 mg, 0.022 mmol) was added and the mixture was heated to 120° C. for 20 hours. The reaction mixture was diluted with EtOAc, filtered, concentrated in vacuo and purified by column chromatography (Si—PCC, EtOAc:cyclohexane, 40-90%) affording 647 (390 mg, 83%). LCMS: RT 4.54 min, [M+H]+ 547.24 1H NMR (400 MHz, DMSO): δ 8.00-7.99 (m; 1 H); 7.68-7.60 (m; 1 H); 7.25-7.24 (m; 2 H); 4.45-4.12 (m; 4 H); 4.12-4.01 (d; J=13.26 Hz, 2 H); 3.85-3.70 (m; 6 H); 3.25-3.10 (m, 4 H); 3.04-2.82 (m, 2 H); 2.00-1.90 (d; J=13.26 Hz, 2 H); 1.76-1.59 (m, 2); 1.43 (s; 9 H); 1.35 (t, J=7.44 Hz, 3 H).

Workup

  1. customwas degassed with nitrogen bubbling for 15 minutes
  2. filtrationfiltered
  3. concentrationconcentrated in vacuo
  4. custompurified by column chromatography (Si—PCC, EtOAc:cyclohexane, 40-90%)

Sources & evidence

ORD record
ord-9ec9ae45b4dc4b54bbf5b108159f883b
Source dataset
uspto-grants-2012_05
Patent number
US08173650B2

Reaction notes

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