Acetic Acid → 4-(2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-8-((4-(oxetan-3-yl)piperidin-1-yl)methyl)-9H-purin-6-yl)morpholine

HRID 1923061Notes

Reaction equation

HRID 1923061 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].[O:30]1[CH2:33][CH:32]([CH:34]2[CH2:39][CH2:38][NH:37][CH2:36][CH2:35]2)[CH2:31]1.COC(OC)OC.C(O)(=O)C.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:37]4[CH2:38][CH2:39][CH:34]([CH:32]5[CH2:33][O:30][CH2:31]5)[CH2:35][CH2:36]4)[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

7

Reactant 5

HCID 176Acetic AcidHCID 9005Trimethyl orthoformateHCID 5049666Sodium triacetoxyborohydride2×HCID 552642454-(Oxetan-3-yl)piperidineHCID 596059872-(2-Ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde

Product 1

HCID 596053584-(2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-8-((4-(oxetan-3-yl)piperidin-1-yl)methyl)-9H-purin-6-yl)morpholineYield 35%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

A mixture of 2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde (0.105 g, 0.27 mmol), 4-oxetan-3-ylpiperidine (0.045 g, 0.32 mmol) in DCE (2 mL), trimethoxymethane (0.314 mL, 2.9 mmol) and acetic acid (0.017 mL, 0.29 mmol) was stirred for 18 h at room temperature. Sodium triacetoxyborohydride (0.101 g, 0.48 mmol) was added and the reaction mixture was stirred for 5 h at room temperature. After adding sodium triacetoxyborohydride (0.101 g, 0.48 mmol) the reaction mixture was stirred for a further 2 h and the suspension was partitioned between DCM and water. The organic layer was separated, washed with brine, dried over sodium sulphate and concentrated. The residue was purified by flash chromatography (Si—PPC, MEOH:DCM gradient 0:100 to 5:95) then (Si—PPC, acetone:EtOAc, 0:100 to 70:30) followed by reverse phase HPLC (Phenomenex Gemini 5u C18, 20 mM triethylamine in water on a gradient of acetonitrile 95:5 to 2:98) to give 314 as an off-white solid (0.048 g, 35%). LCMS (Method G): RT=5.92 min, [M+H]+ 517.3. 1H NMR (CDCl3, 400 MHz) δ 8.03-7.99 (m, 1 H); 7.78-7.74 (m, 1H); 7.29-7.25 (m, 2 H); 4.76 (dd, J=7.9, 6.2 Hz, 2 H); 4.46 (t, J=6.2 Hz, 2 H); 4.44-4.35 (m, 4 H); 3.90-3.84 (m, 7 H); 3.78-3.73 (m, 2 H); 3.36 (q, J=7.5 Hz, 2 H); 2.95-2.91 (m, 2H); 2.79-2.71 (m, 1 H); 2.21-2.17 (m, 2 H); 1.81-1.50 (m, 4 H); 1.49-1.41 (t, J=7.5 Hz, 3H); 1.21-1.15 (m, 1 H)

Workup

  1. stirringthe reaction mixture was stirred for 5 h at room temperature
  2. stirringwas stirred for a further 2 h
  3. customthe suspension was partitioned between DCM and water
  4. customThe organic layer was separated
  5. washwashed with brine
  6. dry with materialdried over sodium sulphate
  7. concentrationconcentrated
  8. customThe residue was purified by flash chromatography (Si—PPC, MEOH:DCM gradient 0:100 to 5:95)

Sources & evidence

ORD record
ord-57a94d56a5254de8a23d905e212f6f3c
Source dataset
uspto-grants-2012_05
Patent number
US08173650B2

Reaction notes

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