Tributylvinyltin → 2-Benzyl-4-vinylisoindoline

HRID 1924369Notes

Reaction equation

HRID 1924369 reaction equation
[CH2:1]([N:8]1[CH2:16][C:15]2[C:10](=[CH:11][CH:12]=[CH:13][C:14]=2Br)[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:18]([Sn](CCCC)(CCCC)C=C)[CH2:19]CC>C1(C)C=CC=CC=1.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>[CH2:1]([N:8]1[CH2:16][C:15]2[C:10](=[CH:11][CH:12]=[CH:13][C:14]=2[CH:18]=[CH2:19])[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 2

HCID 81998TributylvinyltinHCID 529881582-Benzyl-4-bromo-2,3-dihydro-1H-isoindole

Product 1

HCID 574311892-Benzyl-4-vinylisoindoline

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

A solution of 2-benzyl-4-bromoisoindoline (16.7 g, 58.0 mmol) and tributyl(vinyl)tin (20.3 mL, 69.6 mmol) in toluene (400 mL) was degassed by bubbling nitrogen gas through the solution for 0.25 h. Tetrakis(triphenylphosphine)palladium(0) (1.30 g, 1.16 mmol) was added and the resulting solution heated in a 100° C. oil bath under nitrogen for 24 h. The contents of the reaction flask were cooled, evaporated and subjected to flash column chromatography eluting with hexane/EtOAc 95/5 to give after evaporation the title compound as a pale oil that turned pink on standing. LRMS (ESI) m/z 236 [(M+H)+; calcd for C17H18N: 236].

Workup

  1. customby bubbling nitrogen gas through the solution for 0.25 h
  2. temperatureThe contents of the reaction flask were cooled
  3. customevaporated
  4. washeluting with hexane/EtOAc 95/5
  5. customto give
  6. customafter evaporation the title compound as a pale oil that

Sources & evidence

ORD record
ord-8fbf7d7c24c045e487ad5e40dbad3036
Source dataset
uspto-grants-2012_05
Patent number
US08178520B2

Reaction notes

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