Dimethylformamide → 1-[({[(4R,5R)-4,5-bis(nitrooxy)hexyl]oxy}carbonyl)oxy]ethyl 2-ethoxy-1-{[2'-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1H-benzimidazole-7-carboxylate

HRID 889520

Reaction equation

HRID 889520 reaction equation
CN(C)C=O.[C:6](=[O:26])([O:22][CH:23](Cl)[CH3:24])[O:7][CH2:8][CH2:9][CH2:10][C@@H:11]([O:18][N+:19]([O-:21])=[O:20])[C@H:12]([O:14][N+:15]([O-:17])=[O:16])[CH3:13].[CH2:27]([O:29][C:30]1[N:34]([CH2:35][C:36]2[CH:41]=[CH:40][C:39]([C:42]3[CH:47]=[CH:46][CH:45]=[CH:44][C:43]=3[C:48]3[N:52]([C:53]([C:66]4[CH:71]=[CH:70][CH:69]=[CH:68][CH:67]=4)([C:60]4[CH:65]=[CH:64][CH:63]=[CH:62][CH:61]=4)[C:54]4[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=4)[N:51]=[N:50][N:49]=3)=[CH:38][CH:37]=2)[C:33]2[C:72]([C:76]([OH:78])=[O:77])=[CH:73][CH:74]=[CH:75][C:32]=2[N:31]=1)[CH3:28].C(=O)([O-])[O-].[Cs+].[Cs+]>O>[CH2:27]([O:29][C:30]1[N:34]([CH2:35][C:36]2[CH:37]=[CH:38][C:39]([C:42]3[CH:47]=[CH:46][CH:45]=[CH:44][C:43]=3[C:48]3[N:52]([C:53]([C:60]4[CH:61]=[CH:62][CH:63]=[CH:64][CH:65]=4)([C:54]4[CH:55]=[CH:56][CH:57]=[CH:58][CH:59]=4)[C:66]4[CH:71]=[CH:70][CH:69]=[CH:68][CH:67]=4)[N:51]=[N:50][N:49]=3)=[CH:40][CH:41]=2)[C:33]2[C:72]([C:76]([O:78][CH:23]([O:22][C:6]([O:7][CH2:8][CH2:9][CH2:10][C@@H:11]([O:18][N+:19]([O-:21])=[O:20])[C@H:12]([O:14][N+:15]([O-:17])=[O:16])[CH3:13])=[O:26])[CH3:24])=[O:77])=[CH:73][CH:74]=[CH:75][C:32]=2[N:31]=1)[CH3:28]

Participants

6

Reactant 4

HCID 6228Dimethylformamide2×HCID 10796Cesium carbonateHCID 103125632-Ethoxy-1-((2'-(1-(triphenylmethyl)-1H-tetrazol-5-yl)(1,1'-biphenyl)-4-yl)methyl)-1H-benzimidazole-7-carboxylic acidHCID 86647015(4R,5R)-4,5-bis(nitrooxy)hexyl 1-chloroethyl carbonate

Product 1

HCID 866470171-[({[(4R,5R)-4,5-bis(nitrooxy)hexyl]oxy}carbonyl)oxy]ethyl 2-ethoxy-1-{[2'-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1H-benzimidazole-7-carboxylate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
70 °C

Procedure

A N,N-dimethylformamide (20 mL) solution of (4R,5R)-4,5-bis(nitrooxy)hexyl 1-chloroethyl carbonate (2.94 g, 8.89 mmol) was added to a stirred N,N-dimethylformamide (20 mL) suspension of 2-ethoxy-1-{[2′-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1H-benzimidazole-7-carboxylic acid (7.46 g, 10.9 mmol) and cesium carbonate (3.95 g, 12.1 mmol). The solution was stirred at 70° C. for 2 hours. Water (100 mL) was added, and the solution was extracted with ethyl acetate (3×100 mL). The combined organic layers were dried (magnesium sulfate), filtered, and concentrated in vacuo. The residue was purified by column chromatography on silica gel, eluting with 20-60% ethyl acetate/hexanes to give the title compound as a white solid. 1H NMR (500 MHz, CDCl3) δ 7.84 (dd, J=1.6, 7.3 Hz, 1H), 7.76 (dd, J=1.0, 7.9 Hz, 1H), 7.58 (dd, J=1.0, 7.9 Hz, 1H), 7.45 (dt, J=1.7, 7.4 Hz, 1H), 7.42 (dt, J=1.7, 7.4 Hz, 1H), 7.32 (t, J=7.4 Hz, 3H), 7.29 (dd, J=1.5, 7.4 Hz, 1H), 7.24 (t, J=7.8 Hz, 6H), 7.17 (t, J=7.9 Hz, 1H), 6.98 (d, J=8.2 Hz, 2H), 6.92 (d, J=8.2 Hz, 6H), 6.85 (q, J=5.4 Hz, 1H), 6.78 (d, J=8.2 Hz, 2H), 5.56 (s, 2H), 5.12-5.22 (m, 2H), 4.58-4.68 (m, 2H), 4.06-4.20 (m, 2H), 1.64-1.94 (m, 4H), 1.41-1.46 (m, 6H), 1.33 (d, J=6.4 Hz, 3H); LC-MS: m/z 999.5 (M+Na).

Workup

  1. extractionthe solution was extracted with ethyl acetate (3×100 mL)
  2. dry with materialThe combined organic layers were dried (magnesium sulfate)
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by column chromatography on silica gel
  6. washeluting with 20-60% ethyl acetate/hexanes

Sources & evidence

ORD record
ord-2dac838d4af54667aca4735a8211cad2
Source dataset
uspto-grants-2012_08
Patent number
US08252825B2

Linked notes

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