Potassium Acetate → tert-butyl 4-((1R)-1-(5-(6-(bis(4-methoxybenzyl)amino)-2-methyl-4-pyrimidinyl)-6-fluoro-3-pyridinyl)ethyl)-1-piperazinecarboxylate

HRID 1621877Notes

Reaction equation

HRID 1621877 reaction equation
Cl[C:2]1[N:7]=[C:6]([CH3:8])[N:5]=[C:4]([N:9]([CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][CH:21]=2)[CH2:10][C:11]2[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[CH:13][CH:12]=2)[CH:3]=1.[C:28]([O:32][C:33]([N:35]1[CH2:40][CH2:39][N:38]([C@@H:41]([C:43]2[CH:44]=[C:45](B(O)O)[C:46]([F:49])=[N:47][CH:48]=2)[CH3:42])[CH2:37][CH2:36]1)=[O:34])([CH3:31])([CH3:30])[CH3:29].CC([O-])=O.[K+]>O1CCOCC1.O>[CH3:18][O:17][C:14]1[CH:15]=[CH:16][C:11]([CH2:10][N:9]([CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][CH:21]=2)[C:4]2[N:5]=[C:6]([CH3:8])[N:7]=[C:2]([C:45]3[CH:44]=[C:43]([C@H:41]([N:38]4[CH2:37][CH2:36][N:35]([C:33]([O:32][C:28]([CH3:29])([CH3:31])[CH3:30])=[O:34])[CH2:40][CH2:39]4)[CH3:42])[CH:48]=[N:47][C:46]=3[F:49])[CH:3]=2)=[CH:12][CH:13]=1

Participants

6

Reactant 3

HCID 517044Potassium AcetateHCID 595484046-chloro-N,N-bis(4-methoxybenzyl)-2-methylpyrimidin-4-amineHCID 66600472(R)-5-(1-(4-(tert-butoxycarbonyl)piperazin-1-yl)ethyl)-2-fluoropyridin-3-ylboronic acid

Product 1

HCID 66600507tert-butyl 4-((1R)-1-(5-(6-(bis(4-methoxybenzyl)amino)-2-methyl-4-pyrimidinyl)-6-fluoro-3-pyridinyl)ethyl)-1-piperazinecarboxylateYield 43.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

6-chloro-N,N-bis(4-methoxybenzyl)-2-methylpyrimidin-4-amine (Example 177) (0.766 g, 1.996 mmol), (5-((1R)-1-(4-(tert-butoxycarbonyl)-1-piperazinyl)ethyl)-2-fluoro-3-pyridinyl)boronic acid (Example 146, Step 4)(0.705 g, 1.996 mmol), PdCl2AmPhos (0.071 g, 0.100 mmol), and KOAc (0.588 g, 5.99 mmol) in a mixture of dioxane (16.6 mL) and water (3.3 mL) was sparged with nitrogen and then heated at 100° C. for 2.5 h. The yellow reaction mixture was subsequently partitioned between CH2Cl2 (60 mL) and water (50 mL). The organic layer was separated, and the aqueous layer was extracted with CH2Cl2 (2×50 mL). The combined organic extracts were then dried over Na2SO4 and concentrated. The crude material was adsorbed onto a plug of silica gel and purified by chromatography through a silica gel column (80 g), eluting with a gradient of 0% to 100% EtOAc in hexane, to provide tert-butyl 4-((1R)-1-(5-(6-(bis(4-methoxybenzyl)amino)-2-methyl-4-pyrimidinyl)-6-fluoro-3-pyridinyl)ethyl)-1-piperazinecarboxylate (0.570 g, 0.868 mmol, 43.5% yield) as light-yellow foam. m/z (ESI, +ve) 657.2 (M+H)+. 1H NMR (400 MHz, CDCl3) δ 8.43 (d, J=8.22 Hz, 1H); 8.18 (s, 1H); 7.18 (d, J=7.24 Hz, 4H); 6.82-6.89 (m, 5H); 4.75 (br. s., 4H); 3.79 (s, 6H); 3.60 (d, J=7.04 Hz, 1H); 3.43 (br. s., 4H); 2.63 (s, 3H); 2.30-2.53 (m, 4H); 1.44 (s, 12H).

Workup

  1. customwas sparged with nitrogen
  2. customThe yellow reaction mixture was subsequently partitioned between CH2Cl2 (60 mL) and water (50 mL)
  3. customThe organic layer was separated
  4. extractionthe aqueous layer was extracted with CH2Cl2 (2×50 mL)
  5. dry with materialThe combined organic extracts were then dried over Na2SO4
  6. concentrationconcentrated
  7. custompurified by chromatography through a silica gel column (80 g)
  8. washeluting with a gradient of 0% to 100% EtOAc in hexane

Sources & evidence

ORD record
ord-021bbf308b9841b18097ec27fa8f29b0
Source dataset
uspto-grants-2014_07
Patent number
US08772480B2

Reaction notes

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