1-(1-Ethylpiperazin-4-yl)-3-bromoisoquinoline → HCID 22502927, compound

HRID 1251245Notes

Reaction equation

HRID 1251245 reaction equation
[CH3:1][CH:2]([CH2:7][C:8]1[CH:13]=[CH:12][C:11]([Sn](CCCC)(CCCC)CCCC)=[CH:10][CH:9]=1)[C:3]([O:5][CH3:6])=[O:4].Br[C:28]1[N:29]=[C:30]([N:38]2[CH2:43][CH2:42][N:41]([CH2:44][CH3:45])[CH2:40][CH2:39]2)[C:31]2[C:36]([CH:37]=1)=[CH:35][CH:34]=[CH:33][CH:32]=2>C1(C)C(C)=CC=CC=1.C(OCC)(=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH2:44]([N:41]1[CH2:40][CH2:39][N:38]([C:30]2[C:31]3[C:36](=[CH:35][CH:34]=[CH:33][CH:32]=3)[CH:37]=[C:28]([C:11]3[CH:10]=[CH:9][C:8]([CH2:7][CH:2]([C:3]([O:5][CH3:6])=[O:4])[CH3:1])=[CH:13][CH:12]=3)[N:29]=2)[CH2:43][CH2:42]1)[CH3:45]

Participants

6

Reactant 2

HCID 225024471-(1-Ethylpiperazin-4-yl)-3-bromoisoquinolineHCID 22502975HCID 22502975, compound

Product 1

HCID 22502927HCID 22502927, compoundYield 88.6%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 7237O-XyleneSolventHCID 8857Ethyl AcetateSolvent

Procedure

Methyl 2-methyl-3-(4-tributylstannylphenyl)propionate (2.69 g) and 3-bromo-1-(4-ethylpiperazin-1-yl)isoquinoline (1.16 g) were heated under reflux overnight in the presence of tetrakistriphenylphosphinepalladium(0) (0.17 g) in xylene in nitrogen atmosphere. After cooling, the reaction solution was diluted with ethyl acetate and filtered. The filtrate was extracted with 2N hydrochloric acid. The aqueous layer was washed with ethyl acetate, adjusted to pH 10 with a 8N aqueous solution of sodium hydroxide, and then extracted with ethyl acetate. The extract was washed with a 10% aqueous solution of sodium carbonate and brine, and dried over magnesium sulfate. The solvent was evaporated, and the resulting residue was purified by silica gel column chromatography (toluene/acetone system), to give obtain 1-(4-ethylpiperazin-1-yl)-3-[4-(2-methoxycarbonylpropyl)phenyl]isoquinoline (1.34 g) in pale yellow viscous oil.

Workup

  1. temperatureAfter cooling
  2. filtrationfiltered
  3. extractionThe filtrate was extracted with 2N hydrochloric acid
  4. washThe aqueous layer was washed with ethyl acetate
  5. extractionextracted with ethyl acetate
  6. washThe extract was washed with a 10% aqueous solution of sodium carbonate and brine
  7. dry with materialdried over magnesium sulfate
  8. customThe solvent was evaporated
  9. customthe resulting residue was purified by silica gel column chromatography (toluene/acetone system)
  10. customto give

Sources & evidence

ORD record
ord-24f786c585644893bf598ec798a1afc7
Source dataset
uspto-grants-2002_01
Patent number
US06340759B1

Reaction notes

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