1-Aminomethyl-3-cyclohexyl-5,6-dimethoxy-3,4-dihydronaphthalene hydrochloride → [1R,3S]1-Aminomethyl-3-cyclohexyl-5,6-dimethoxy-1,2,3,4-tetrahydronaphthalene Hydrochloride

HRID 233396Notes

Reaction equation

HRID 233396 reaction equation
[ClH:1].[NH2:2][CH2:3][C:4]1[C:13]2[C:8](=[C:9]([O:16][CH3:17])[C:10]([O:14][CH3:15])=[CH:11][CH:12]=2)[CH2:7][CH:6]([CH:18]2[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]2)[CH:5]=1.[H][H]>C(O)C.[Pd]>[ClH:1].[NH2:2][CH2:3][C@H:4]1[C:13]2[C:8](=[C:9]([O:16][CH3:17])[C:10]([O:14][CH3:15])=[CH:11][CH:12]=2)[CH2:7][C@@H:6]([CH:18]2[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]2)[CH2:5]1

Participants

5

Reactant 2

HCID 199611061-Aminomethyl-3-cyclohexyl-5,6-dimethoxy-3,4-dihydronaphthalene hydrochlorideHCID 178418361HCID 178418361, compound

Product 1

HCID 18641645[1R,3S]1-Aminomethyl-3-cyclohexyl-5,6-dimethoxy-1,2,3,4-tetrahydronaphthalene HydrochlorideYield 100%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 702EthanolSolvent2×

Procedure

1-Aminomethyl-3-cyclohexyl-5,6-dimethoxy-3,4-dihydronaphthalene hydrochloride (1 g, 3.3 mmol), from Step 2 of Example 36, was dissolved in 20 mL of ethanol and 0.25 g of 10% palladium on carbon was added to the ethanol solution. The reaction mixture was sealed under one atmosphere of hydrogen and shaken at ambient temperature for 24 h. The reaction mixture was filtered to remove the catalyst and concentrated to give 1 g (100% yield) of the title compound. m.p. 282°-283° C.; 1H NMR (d6 -DMSO) δ: 1.0-1.5 (m, 8H), 1.5-1.9 (m, 5H), 2.0-2.2 (m, 2H), 2.7-3.1 (m, 3H), 3.3-3.4 (m, 1H), 3.8 (s, 3H), 3.9 (s, 3H), 6.4-6.8 (m, 2H).

Workup

  1. filtrationThe reaction mixture was filtered
  2. customto remove the catalyst
  3. concentrationconcentrated

Sources & evidence

ORD record
ord-fceb92bef83b4d8ca2914b726a031874
Source dataset
uspto-grants-1997_01
Patent number
US05591884

Reaction notes

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