Sodium triacetoxyborohydride → 2-(4-tert-butylphenyl)-7-(4-((2-ethyl-5-methyl-1H-imidazol-4-yl)methyl)piperazin-1-yl)-3H-imidazo[4,5-c]pyridine

HRID 729356Notes

Reaction equation

HRID 729356 reaction equation
C(O[C:9]([N:11]1[CH2:16][CH2:15][N:14]([C:17]2[C:18]3[N:25]=[C:24]([C:26]4[CH:31]=[CH:30][C:29]([C:32]([CH3:35])([CH3:34])[CH3:33])=[CH:28][CH:27]=4)[NH:23][C:19]=3[CH:20]=[N:21][CH:22]=2)[CH2:13][CH2:12]1)=O)C1C=CC=CC=1.[CH2:36]([C:38]1[NH:42][C:41](C=O)=[C:40]([CH3:45])[N:39]=1)[CH3:37].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C1COCC1.[Pd]>[C:32]([C:29]1[CH:30]=[CH:31][C:26]([C:24]2[NH:25][C:18]3[C:17]([N:14]4[CH2:15][CH2:16][N:11]([CH2:9][C:41]5[NH:42][C:38]([CH2:36][CH3:37])=[N:39][C:40]=5[CH3:45])[CH2:12][CH2:13]4)=[CH:22][N:21]=[CH:20][C:19]=3[N:23]=2)=[CH:27][CH:28]=1)([CH3:34])([CH3:33])[CH3:35]

Participants

6

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 578327604-[2-(4-tert-Butyl-phenyl)-3H-imidazo[4,5-c]pyridin-7-yl]-piperazine-1-carboxylic acid benzyl esterHCID 178437630HCID 178437630, compound

Product 1

HCID 1784376222-(4-tert-butylphenyl)-7-(4-((2-ethyl-5-methyl-1H-imidazol-4-yl)methyl)piperazin-1-yl)-3H-imidazo[4,5-c]pyridineYield 34.6%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 8028TetrahydrofuranSolvent

Procedure

4-[2-(4-tert-Butyl-phenyl)-3H-imidazo[4,5-c]pyridin-7-yl]-piperazine-1-carboxylic acid benzyl ester 7 (12 mg, 0.026 mmol) was dissolved in THF (2 ml) with 10% Pd/C (10 mg) and allowed to stir under a hydrogen atmosphere for 12 hours. The reaction was judged complete by MS. 2-Ethyl-5-methyl-3H-imidazole-4-carbaldehyde 8 (7 mg, 0.05 mmol) and sodium triacetoxyborohydride (15 mg. 0.072 mmol) were added, and the reaction was allowed to stir for 12 hours. It was judged complete by MS, and the crude was purified by HPLC (Method E) to yield the title product 9 (4 mg (25%), 0.009 mmol). 1H NMR (CD3OD-d4): δ 8.58 (s, 1H), 8.12 (d, J=8.6 Hz, 2H), 7.72 (s, 1H), 7.58 (d, J=8.6 Hz, 2H), 3.93 (m, 5H), 3.25 (s, 3H), 3.05 (m, 3H), 2.79 (q, J=7.4 Hz, 2H), 1.35 (s, 9H). MS (ESI-POS): [M+H]+=458; MS (ESI-NEG):[M−H]−=456.

Workup

  1. stirringto stir for 12 hours
  2. customthe crude was purified by HPLC (Method E)

Sources & evidence

ORD record
ord-dd293431d1b74e90acee1697fe5c153d
Source dataset
uspto-grants-2009_09
Patent number
US07582634B2

Reaction notes

Loading…