1-Bromo-2-(bromomethyl)-4-(trifluoromethyl)benzene → (3,5-bis-trifluoromethyl-benzyl)-(2-bromo-5-trifluoromethyl-benzyl)-(2-methyl-2H-tetrazol-5-yl)amine

HRID 2075016Notes

Reaction equation

HRID 2075016 reaction equation
[F:1][C:2]([F:22])([F:21])[C:3]1[CH:4]=[C:5]([CH:14]=[C:15]([C:17]([F:20])([F:19])[F:18])[CH:16]=1)[CH2:6][NH:7][C:8]1[N:9]=[N:10][N:11]([CH3:13])[N:12]=1.CC(C)([O-])C.[K+].[Br:29][C:30]1[CH:35]=[CH:34][C:33]([C:36]([F:39])([F:38])[F:37])=[CH:32][C:31]=1[CH2:40]Br>C1COCC1>[F:18][C:17]([F:19])([F:20])[C:15]1[CH:14]=[C:5]([CH:4]=[C:3]([C:2]([F:1])([F:21])[F:22])[CH:16]=1)[CH2:6][N:7]([CH2:40][C:31]1[CH:32]=[C:33]([C:36]([F:37])([F:39])[F:38])[CH:34]=[CH:35][C:30]=1[Br:29])[C:8]1[N:9]=[N:10][N:11]([CH3:13])[N:12]=1

Participants

5

Reactant 3

HCID 27562491-Bromo-2-(bromomethyl)-4-(trifluoromethyl)benzeneHCID 230732215-[N-(3',5'-Bistrifluoromethylbenzyl)amino]-2-methyltetrazoleHCID 23665647Potassium tert-butoxide2×

Product 1

HCID 58966468(3,5-bis-trifluoromethyl-benzyl)-(2-bromo-5-trifluoromethyl-benzyl)-(2-methyl-2H-tetrazol-5-yl)amineYield 70%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of N-(3,5-bis(trifluoromethyl)benzyl)-2-methyl-2H-tetrazol-5-amine (3.9 g, 12 mmol) in THF (50 mL) at room temperature was added potassium tert-butoxide (KOtBu) (13.2 ml of 1M solution, 13.2 mmol) followed by 1-bromo-2-(bromomethyl)-4-(trifluoromethyl)benzene (4 g, 12.6 mmol). The mixture was stirred at room temperature for 16 hours. Additional KOtBu in THF (13.2 mL of 1M solution, 13.2 mmol) was added and the mixture was stirred at room temperature for 2 hours. The reaction mixture was partitioned between water (50 mL) and ethyl acetate (3×50 mL). The combined organic layers were washed with saturated NaCl (50 mL), dried (MgSO4) and concentrated. The residue was purified by flash chromatography (silica gel) (eluted with 3:1 hexane-ethyl acetate) to yield the title compound (4.72 g). 1H NMR (400 MHz, CDCl3) δ 4.2 (s, 3H) 4.8 (s, 2H) 4.9 (s, 2H) 7.4 (dd, J=8.2, 1.7 Hz, 1H) 7.5 (d, J=1.7 Hz, 1H) 7.7 (m, 3H) 7.8 (s, 1H). MS (ES+) Calc: 561.02, Found: 561.7 (M+1).

Workup

  1. stirringthe mixture was stirred at room temperature for 2 hours
  2. customThe reaction mixture was partitioned between water (50 mL) and ethyl acetate (3×50 mL)
  3. washThe combined organic layers were washed with saturated NaCl (50 mL)
  4. dry with materialdried (MgSO4)
  5. concentrationconcentrated
  6. customThe residue was purified by flash chromatography (silica gel) (eluted with 3:1 hexane-ethyl acetate)

Sources & evidence

ORD record
ord-da55f00f505e4df391ea043cfee26e77
Source dataset
uspto-grants-2011_04
Patent number
US07919506B2

Reaction notes

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