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(1-Bromoethyl)benzene → 6-Bromo-2-(1-phenylethyl)-isoquinolin-1-one

HRID 1037618
Notes
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Reaction equation

HRID 1037618 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8]([OH:12])=[N:7][CH:6]=[CH:5]2.Br[CH:14]([C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[CH3:15].[OH-].[Na+]>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.C1(C)C=CC=CC=1.C(OCC)C>[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](=[O:12])[N:7]([CH:14]([C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[CH3:15])[CH:6]=[CH:5]2
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 3

HCID 11454(1-Bromoethyl)benzeneHCID 14798Sodium HydroxideHCID 178517609HCID 178517609, compound

Product 1

HCID 672849966-Bromo-2-(1-phenylethyl)-isoquinolin-1-oneYield 100%

Reagents, catalysts & solvents 3

HCID 74236Tetrabutylammonium BromideCatalyst
HCID 1140
Toluene
Solvent
HCID 3283Diethyl EtherSolvent

Conditions

Temperature
70 °C

Procedure

6-Bromo-1-hydroxyisoquinoline (150 mg, 0.67 mmol, 1.0 equiv), tetrabutylammonium bromide (25 mg, 0.07 mmol, 0.1 equiv), and 1-bromoethylbenzene (160 uL, 0.8 mmol, 1.2 equiv) were combined in toluene (7 mL) and treated with 50% aq. NaOH (2 mL) and the resulting mixture was stirred rapidly while heating to 70° C. After additional stirring for 14 hours, the mixture was diluted with diethyl ether and washed with water and brine. The organic phase was dried over Na2SO4. Addition of silica gel, concentration, and purification of the residue using flash silica gel chromatography (gradient 2→12% ethyl acetate/hexanes) gave 6-bromo-2-(1-phenylethyl)-isoquinolin-1-one (227 mg, 0.67 mmol, quant.) as a yellowish oil. This isoquinolinone (220 mg, 0.67 mmol) was converted, via Methods 1 and 2, to compound 4 (109 mg, 56%) and isolated as a white solid. [M−H]−=292.1 m/z. Activity: B

Workup

  1. stirringAfter additional stirring for 14 hours
  2. washwashed with water and brine
  3. dry with materialThe organic phase was dried over Na2SO4
  4. additionAddition of silica gel, concentration, and purification of the residue

Sources & evidence

ORD record
ord-8fdd81ce166f4d3282a00cec1caa2c74
Source dataset
uspto-grants-2013_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08546564B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes