Water → (2S)-Benzyl-[5-(1,3,5-trimethyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydro-naphthalen-2-yl]-amine

HRID 420781Notes

Reaction equation

HRID 420781 reaction equation
[CH2:1]([N:8](C(C(C)(C)C)=O)[C@H:9]1[CH2:18][CH2:17][C:16]2[C:11](=[CH:12][CH:13]=[CH:14][C:15]=2[C:19]2[C:20]([CH3:26])=[N:21][N:22]([CH3:25])[C:23]=2[CH3:24])[CH2:10]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(O)(C(F)(F)F)=O.O>C(Cl)Cl>[CH2:1]([NH:8][C@H:9]1[CH2:18][CH2:17][C:16]2[C:11](=[CH:12][CH:13]=[CH:14][C:15]=2[C:19]2[C:20]([CH3:26])=[N:21][N:22]([CH3:25])[C:23]=2[CH3:24])[CH2:10]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 962WaterHCID 6422Trifluoroacetic acidHCID 66658895N-benzyl-N-tert-butylcarbonyl-N-[(2S)-5-(1,3,5-trimethyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydronaphthalen-2-yl]amine

Product 1

HCID 24989524(2S)-Benzyl-[5-(1,3,5-trimethyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydro-naphthalen-2-yl]-amineYield 73%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

From N-benzyl-N-tert-butylcarbonyl-N-[(2S)-5-(1,3,5-trimethyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydronaphthalen-2-yl]amine: TFA (0.330 mL, 4.275 mmol) was added to a 0° C. cooled solution of starting material (0.381 g, 0.855 mmol) in CH2Cl2 (15 mL). The reaction was allowed to reach room temperature, and stirred at this temperature for 7 h. It was poured into H2O (20 mL), extracted with CH2Cl2 (1×25 mL) and washed with NaOH aqueous solution (10%, 2×20 mL). The organic layer was dried over anhydrous Na2SO4, filtered and concentrated. The crude residue was flash chromatographed on silica gel (0-5-10% MeOH/CH2Cl2) to give 0.215 g of the title product (Rf=0.2 (10% MeOH/CH2Cl2), yellow oil, 73% yield).

Workup

  1. customto reach room temperature
  2. extractionextracted with CH2Cl2 (1×25 mL)
  3. washwashed with NaOH aqueous solution (10%, 2×20 mL)
  4. dry with materialThe organic layer was dried over anhydrous Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customchromatographed on silica gel (0-5-10% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-9c9d6cb3362f411099137cfe6e325dbc
Source dataset
uspto-grants-2012_01
Patent number
US08097641B2

Reaction notes

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