6-Methoxy-2-(4-nitrophenyl)-1-[4-(phenylmethoxy)benzyl]-1,2,3,4-tetrahydroisoquinoline → 2-(4-Aminophenyl)-6-methoxy-1-[4-(phenylmethoxy)benzyl]-1,2,3,4-tetrahydroisoquinoline

HRID 2304657Notes

Reaction equation

HRID 2304657 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[CH:9]([CH2:13][C:14]1[CH:19]=[CH:18][C:17]([O:20][CH2:21][C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)=[CH:16][CH:15]=1)[N:8]([C:28]1[CH:33]=[CH:32][C:31]([N+:34]([O-])=O)=[CH:30][CH:29]=1)[CH2:7][CH2:6]2.Cl[Sn]Cl.O>C1COCC1.CC(O)=O.O>[NH2:34][C:31]1[CH:32]=[CH:33][C:28]([N:8]2[CH2:7][CH2:6][C:5]3[C:10](=[CH:11][CH:12]=[C:3]([O:2][CH3:1])[CH:4]=3)[CH:9]2[CH2:13][C:14]2[CH:19]=[CH:18][C:17]([O:20][CH2:21][C:22]3[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=3)=[CH:16][CH:15]=2)=[CH:29][CH:30]=1

Participants

5

Reactant 2

HCID 234408236-Methoxy-2-(4-nitrophenyl)-1-[4-(phenylmethoxy)benzyl]-1,2,3,4-tetrahydroisoquinolineHCID 43835034Tin dichloride dihydrate

Product 1

HCID 234407492-(4-Aminophenyl)-6-methoxy-1-[4-(phenylmethoxy)benzyl]-1,2,3,4-tetrahydroisoquinolineYield 95.8%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 23444217Acetic acid tetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

A suspension of 6-methoxy-2-(4-nitrophenyl)-1-[4-(phenylmethoxy)benzyl]-1,2,3,4-tetrahydroisoquinoline (0.70 g, 1.46 mmol) and SnCl2.H2O (1.35 g, 6.0 mmol) in 20 mL of THF/HOAc (1:1) and 3 mL of water was heated at 60° C. for 3 h. The reaction mixture was concentrated under reduced pressure and the resulting residue was quenched by the addition of saturated aqueous NaHCO3 (50 mL). The aqueous layer was extracted with EtOAc (3×50 mL) and the combined organic layer was dried over MgSO4 then concentrated. The crude product was purified by flash chromatography to provide the title compound (0.63 g, 95% yield). ES-MS, (m/z) 451 [M+H]+.

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. customthe resulting residue was quenched by the addition of saturated aqueous NaHCO3 (50 mL)
  3. extractionThe aqueous layer was extracted with EtOAc (3×50 mL)
  4. dry with materialthe combined organic layer was dried over MgSO4
  5. concentrationthen concentrated
  6. customThe crude product was purified by flash chromatography

Sources & evidence

ORD record
ord-4c4ff51341b345179c935014b6637512
Source dataset
uspto-grants-2002_08
Patent number
US06436923B1

Reaction notes

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