Cyclopentanecarbaldehyde → (S)-(3,5-Bistrifluoromethylbenzyl)-(1-cyclopentylmethyl-7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)-(2-methyl-2H-tetrazol-5-yl)amine

HRID 507037Notes

Reaction equation

HRID 507037 reaction equation
[CH:1]1([CH:6]=O)[CH2:5][CH2:4][CH2:3][CH2:2]1.[F:8][C:9]([F:45])([F:44])[C:10]1[CH:11]=[C:12]([CH:37]=[C:38]([C:40]([F:43])([F:42])[F:41])[CH:39]=1)[CH2:13][N:14]([C:31]1[N:32]=[N:33][N:34]([CH3:36])[N:35]=1)[C@H:15]1[CH2:21][CH2:20][CH2:19][NH:18][C:17]2[CH:22]=[C:23]([C:27]([F:30])([F:29])[F:28])[C:24]([CH3:26])=[CH:25][C:16]1=2.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(O)(=O)C.ClCCCl.C(Cl)Cl>[F:45][C:9]([F:8])([F:44])[C:10]1[CH:11]=[C:12]([CH:37]=[C:38]([C:40]([F:43])([F:41])[F:42])[CH:39]=1)[CH2:13][N:14]([C@H:15]1[CH2:21][CH2:20][CH2:19][N:18]([CH2:6][CH:1]2[CH2:5][CH2:4][CH2:3][CH2:2]2)[C:17]2[CH:22]=[C:23]([C:27]([F:28])([F:29])[F:30])[C:24]([CH3:26])=[CH:25][C:16]1=2)[C:31]1[N:32]=[N:33][N:34]([CH3:36])[N:35]=1

Participants

7

Reactant 3

HCID 70106CyclopentanecarbaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 59432408(S)-(3,5-bistrifluoromethylbenzyl)-(2-methyl-2H-tetrazol-5-yl)-(7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)amine

Product 1

HCID 11505545(S)-(3,5-Bistrifluoromethylbenzyl)-(1-cyclopentylmethyl-7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)-(2-methyl-2H-tetrazol-5-yl)amineYield 70.3%

Reagents, catalysts & solvents 3

HCID 111,2-DichloroethaneSolventHCID 176Acetic AcidSolventHCID 6344DichloromethaneSolvent

Procedure

Add cyclopentanecarboxaldehyde (462 mg, 4.71 mmol) to a solution of (S)-(3,5-bistrifluoromethylbenzyl)-(2-methyl-2H-tetrazol-5-yl)-(7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)amine (520 mg, 0.941 mmol) in acetic acid (1 mL) and 1,2-dichloroethane (10 mL) at room temperature under nitrogen and stir for 1 h. Add sodium triacetoxy borohydride (998 mg, 4.71 mmol) and stir for 5 min. Dilute the mixture with methylene chloride (30 mL) and wash with saturated aqueous sodium bicarbonate solution (2×10 mL). Extract the combined aqueous washes with methylene chloride (20 mL) and wash the combined organic extracts with brined (20 mL) and dry over anhydrous sodium sulfate. Remove the solvents under reduced pressure and purify the residue by column chromatography on silica gel, eluting with ethyl acetate/hexanes (1:2), to provide the title compound as a colorless oil (420 mg, 70%). APCI MS m/z 635 (M+H)+.

Workup

  1. washwash with saturated aqueous sodium bicarbonate solution (2×10 mL)
  2. extractionExtract the combined aqueous washes with methylene chloride (20 mL)
  3. washwash the combined organic extracts with brined (20 mL)
  4. dry with materialdry over anhydrous sodium sulfate
  5. customRemove the solvents under reduced pressure
  6. custompurify the residue by column chromatography on silica gel
  7. washeluting with ethyl acetate/hexanes (1:2)

Sources & evidence

ORD record
ord-f3059f5175884d1ab973024a544eee51
Source dataset
uspto-grants-2010_08
Patent number
US07786108B2

Reaction notes

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