2-Piperazinone, 3,3-dimethyl- → 4-((2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)methyl)-3,3-dimethylpiperazin-2-one

HRID 1946110

Reaction equation

HRID 1946110 reaction equation
[CH2:1]([C:3]1[N:7]([C:8]2[N:16]=[C:15]3[C:11]([N:12]=[C:13]([CH:18]=O)[N:14]3[CH3:17])=[C:10]([N:20]3[CH2:25][CH2:24][O:23][CH2:22][CH2:21]3)[N:9]=2)[C:6]2[CH:26]=[CH:27][CH:28]=[CH:29][C:5]=2[N:4]=1)[CH3:2].[CH3:30][C:31]1([CH3:38])[NH:36][CH2:35][CH2:34][NH:33][C:32]1=[O:37].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[CH2:1]([C:3]1[N:7]([C:8]2[N:16]=[C:15]3[C:11]([N:12]=[C:13]([CH2:18][N:36]4[CH2:35][CH2:34][NH:33][C:32](=[O:37])[C:31]4([CH3:38])[CH3:30])[N:14]3[CH3:17])=[C:10]([N:20]3[CH2:25][CH2:24][O:23][CH2:22][CH2:21]3)[N:9]=2)[C:6]2[CH:26]=[CH:27][CH:28]=[CH:29][C:5]=2[N:4]=1)[CH3:2]

Participants

5

Reactant 3

HCID 2111572-Piperazinone, 3,3-dimethyl-HCID 5049666Sodium triacetoxyborohydrideHCID 596059872-(2-Ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde

Product 1

HCID 596058864-((2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)methyl)-3,3-dimethylpiperazin-2-oneYield 11%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

A solution of 2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde (250 mg, 0.64 mmol), 3,3-dimethylpiperazin-2-one (100 mg, 0.78 mmol) and molecular sieves (4 Å, powdered, 1 g) in DCE (15 mL) was stirred at ambient temperature for 4 h. Sodium triacetoxyborohydride (204 mg, 0.96 mmol) was added and the mixture stirred for 16 h, then loaded onto an Isolute® SCX-2 cartridge (10 g). The cartridge was then washed with methanol and the desired product was subsequently eluted using 2 M NH3 in MeOH. The product was collected and concentrated in vacuo. The resultant residue was purified by flash chromatography (Si—PPC, DCM:MeOH, 100:0 to 98:2 to 95:5) to afford 649 as a yellow solid (34 mg, 11%). LCMS (method I): RT=3.12 min, M+H+=504. 1H NMR (CDCl3, 400 MHz) δ 8.02 (m, 1 H), 7.79 (m, 1 H), 7.30 (m, 2 H), 5.75 (bs, 1 H), 4.34 (m, 4 H), 3.94 (s, 2 H), 3.92 (s, 3 H), 3.87 (m, 4 H), 3.38 (q, J=7.4 Hz, 2 H), 3.23 (m, 2 H), 2.80 (m, 2 H), 1.54 (s, 6 H) and, 1.47 (t, J=7.4 Hz, 3 H)

Workup

  1. washThe cartridge was then washed with methanol
  2. washthe desired product was subsequently eluted
  3. customThe product was collected
  4. concentrationconcentrated in vacuo
  5. customThe resultant residue was purified by flash chromatography (Si—PPC, DCM:MeOH, 100:0 to 98:2 to 95:5)

Sources & evidence

ORD record
ord-16ac4804b5434032828cee80b057920a
Source dataset
uspto-grants-2013_03
Patent number
US08394796B2

Linked notes

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