Hydrochloric Acid → HCID 15222069, compound

HRID 274815Notes

Reaction equation

HRID 274815 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[N:7]1[CH2:12][CH2:11][NH:10][CH2:9][CH2:8]1.Cl.C[Al](C)C.C[O:19][C:20]([C:22]1[N:23]=[C:24]([CH2:68][CH2:69][CH3:70])[N:25]([CH2:31][C:32]2[CH:37]=[CH:36][C:35]([C:38]3[CH:43]=[CH:42][CH:41]=[CH:40][C:39]=3[C:44]3[N:48]([C:49]([C:62]4[CH:67]=[CH:66][CH:65]=[CH:64][CH:63]=4)([C:56]4[CH:61]=[CH:60][CH:59]=[CH:58][CH:57]=4)[C:50]4[CH:55]=[CH:54][CH:53]=[CH:52][CH:51]=4)[N:47]=[N:46][N:45]=3)=[CH:34][CH:33]=2)[C:26]=1[C:27]([O:29][CH3:30])=[O:28])=O>C(Cl)Cl.CCOCC.C1(C)C=CC=CC=1>[CH3:30][O:29][C:27]([C:26]1[N:25]([CH2:31][C:32]2[CH:33]=[CH:34][C:35]([C:38]3[CH:43]=[CH:42][CH:41]=[CH:40][C:39]=3[C:44]3[N:48]([C:49]([C:62]4[CH:67]=[CH:66][CH:65]=[CH:64][CH:63]=4)([C:56]4[CH:57]=[CH:58][CH:59]=[CH:60][CH:61]=4)[C:50]4[CH:55]=[CH:54][CH:53]=[CH:52][CH:51]=4)[N:47]=[N:46][N:45]=3)=[CH:36][CH:37]=2)[C:24]([CH2:68][CH2:69][CH3:70])=[N:23][C:22]=1[C:20]([N:10]1[CH2:9][CH2:8][N:7]([C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=2)[CH2:12][CH2:11]1)=[O:19])=[O:28]

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 944591-(2-Pyridyl)piperazineHCID 15222104HCID 15222104, compoundHCID 16682925Trimethylaluminum

Product 1

HCID 15222069HCID 15222069, compoundYield 71%

Reagents, catalysts & solvents 3

HCID 1140TolueneSolventHCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
10 °C

Procedure

To a solution of 0.72 g (4.4 mmol) of 1-(2-pyridyl)piperazine in 10 mL of anhydrous CH2Cl2 under N2 was added 4.4 mL (4.4 mmol) of a 1 N solution of HCl in ether. After 15 min., the suspension was cooled to 10° C. and treated with 2.2 mL (4.4 mmol) of 2.0 M Me3Al in toluene. Slow gas evolution was noted. After 30 min., a solution of 2.81 g (4.00 mmol) of 4,5-bis(methoxycarbonyl)-2-propyl-1-[(2'-(N-trityltetrazol-5-yl)biphen-4-yl)methyl]imidazole in 12 mL of CH2Cl2 was added. The reaction mixture was allowed to warm to room temperature and stir for 2 h, then partitioned between EtOAc and H2O. The water layer was washed with EtOAc and the combined organic extracts were washed with water and brine, then dried over MgSO4. After removal of solvents at reduced pressure, the residual tan foam (4.08 g) was purified using flash chromatography (eluent: 50/50 EtOAc-hexane to 1% MeOH-EtOAc) to give 2.36 g (71%)of the title compound as a white foam. 1H NMR (300 MHz, CDCl3): δ 0.88 (t, J=7.5 Hz, 3H, CH3); 1.70 (sextet, J=7.5 Hz, 2H, CH2); 2.52 (t, J=7.5 Hz, 2H, CH2); 3.45 (m, 2H, piperazine); 3.54 (m, 2H, piperazine); 3.63 (m, 2H, piperazine); 3.71 (s, 3H, CO2CH3); 3.93 (m, 2H, piperazine); 5.46 (s, 2H, benzyl); 6.67 (m, 2H, aromatic); 6.82 (d, J=8.0 Hz, 2H, p-disubstituted aromatic); 6.94 (d, J=7.5 Hz, 6H, trityl); 7.11 (d, J=8.0 Hz, 2H, p-disubstituted aromatic); 7.2-7.4 (m, 10H, aromatic); 7.4-7.5 (m, 3H, aromatic); 7.91 (dd, J= 7.0, 6.0 Hz, 1H, tetrazolyl-phenyl); 8.19 (approx. dd, J=5.5, 2 . 0 Hz, 1H, pyridyl).

Workup

  1. waitAfter 30 min.
  2. temperatureto warm to room temperature
  3. custompartitioned between EtOAc and H2O
  4. washThe water layer was washed with EtOAc
  5. washthe combined organic extracts were washed with water and brine
  6. dry with materialdried over MgSO4
  7. customAfter removal of solvents at reduced pressure
  8. customthe residual tan foam (4.08 g) was purified

Sources & evidence

ORD record
ord-5f40e303e32643289900f9793076f9f5
Source dataset
uspto-grants-1995_02
Patent number
US05389635

Reaction notes

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