Potassium Hydroxide → 1-(4-Butylbenzyl)isoquinoline

HRID 2077998Notes

Reaction equation

HRID 2077998 reaction equation
[CH2:1]([C:5]1[CH:10]=[CH:9][C:8]([C:11]([C:13]2[C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[CH:16]=[CH:15][N:14]=2)=O)=[CH:7][CH:6]=1)[CH2:2][CH2:3][CH3:4].O.NN.[OH-].[K+]>C(O)COCCO>[CH2:1]([C:5]1[CH:10]=[CH:9][C:8]([CH2:11][C:13]2[C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[CH:16]=[CH:15][N:14]=2)=[CH:7][CH:6]=1)[CH2:2][CH2:3][CH3:4]

Participants

5

Reactant 3

HCID 14797Potassium HydroxideHCID 24654Hydrazine hydrate (1:1)HCID 17851496(4-Butylphenyl)(isoquinolin-1-yl)methanone

Product 1

HCID 99002251-(4-Butylbenzyl)isoquinolineYield 55.3%

Reagents, catalysts & solvents 1

HCID 8117Diethylene GlycolSolvent

Conditions

Temperature
160 °C

Procedure

The compound of Example B3 (1.7 g, 6.0 mmol), hydrazine monohydrate (836 mg, 17 mmol), and potassium hydroxide (769 mg, 14 mmol) were added to diethylene glycol (8.5 ml), and this mixture was stirred at 80° C. for 1 hour, at 160° C. for 3.5 hours, then at 200° C. for 1 hour. The mixture was cooled to room temperature, ice water was added, and this was extracted with ethyl acetate. The extract was washed with water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to give the title compound (914 mg).

Workup

  1. waitat 200° C. for 1 hour
  2. temperatureThe mixture was cooled to room temperature
  3. extractionthis was extracted with ethyl acetate
  4. washThe extract was washed with water
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-1c1d1dcf8efa471bbf21a4d46ecb5860
Source dataset
uspto-grants-2011_04
Patent number
US07928209B2

Reaction notes

Loading…