Sodium triacetoxyborohydride → N-((1-((2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)methyl)azetidin-3-yl)methyl)-N-methyloxetan-3-amine

HRID 1945951Notes

Reaction equation

HRID 1945951 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].[NH:30]1[CH2:33][CH:32]([CH2:34][N:35]([CH3:40])[CH:36]2[CH2:39][O:38][CH2:37]2)[CH2:31]1.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:30]4[CH2:31][CH:32]([CH2:34][N:35]([CH3:40])[CH:36]5[CH2:37][O:38][CH2:39]5)[CH2:33]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

5

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 59605256HCID 59605256, compoundHCID 596059872-(2-Ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde

Product 1

HCID 59606015N-((1-((2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)methyl)azetidin-3-yl)methyl)-N-methyloxetan-3-amineYield 59.2%

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 (78 mg, 0.2 mmol), (azetidin-3-ylmethyl)methyloxetan-3-yl-amine (47 mg, 0.3 mmol), and 4 Å molecular sieves (250 mg) in 1,2-dichloroethane (2 mL) was stirred at RT for 6 h. Sodium triacetoxyborohydride (85 mg, 0.4 mmol) was added and the resulting reaction mixture was stirred at RT under nitrogen atmosphere for 16 h. The suspension was filtered through Celite and the filtrate was concentrated in vacuo. The crude residue was loaded on an Isolute® SCX-2 cartridge (5 g). The cartridge was washed with DCM/MeOH and the desired product was subsequently eluted using a mixture of 2M NH3 in MeOH and DCM. The residue was purified by column chromatography (Si—PPC, MeOH:DCM, gradient 0:100 to 8:92) to afford 421 as an off-white foam (63 mg, 59%). LCMS (Method I): RT 2.11 min, [M+H]+ 532. 1H NMR (400 MHz, CDCl3): δ 7.97-7.96 (1 H, m), 7.72-7.71 (1 H, m), 7.23 (2 H, t, J=3.78 Hz), 4.61 (2 H, t, J=6.53 Hz), 4.53 (2 H, t, J=6.23 Hz), 4.32 (4 H, s), 3.82-3.81 (9 H, m), 3.51-3.50 (3 H, m), 3.32 (2 H, q, J=7.48 Hz), 3.03-2.89 (2 H, m), 2.68-2.57 (1 H, m), 2.40 (2 H, d, J=7.26 Hz), 2.04 (3 H, s), 1.41 (3 H, t, J=7.47 Hz)

Workup

  1. customthe resulting reaction mixture
  2. stirringwas stirred at RT under nitrogen atmosphere for 16 h
  3. filtrationThe suspension was filtered through Celite
  4. concentrationthe filtrate was concentrated in vacuo
  5. washThe cartridge was washed with DCM/MeOH
  6. washthe desired product was subsequently eluted
  7. additiona mixture of 2M NH3 in MeOH and DCM
  8. customThe residue was purified by column chromatography (Si—PPC, MeOH:DCM, gradient 0:100 to 8:92)

Sources & evidence

ORD record
ord-0bac7b290a7442fa80dd200491eac4b4
Source dataset
uspto-grants-2013_03
Patent number
US08394796B2

Reaction notes

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