Toluene → 2-Methylbuta-1,3-diene;styrene

HRID 1671463Notes

Reaction equation

HRID 1671463 reaction equation
[C:1]1([CH3:7])[CH:6]=CC=[CH:3][CH:2]=1.[CH2:8]=[CH:9][C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.C=CC(=C)C>CO>[CH2:3]=[CH:2][C:1](=[CH2:6])[CH3:7].[CH2:8]=[CH:9][C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1

Participants

5

Reactant 3

HCID 1140TolueneHCID 6557IsopreneHCID 7501Styrene

Product 1

HCID 1599892-Methylbuta-1,3-diene;styrene

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

To a 100 ml-flask in a Glove Box, (C5Me4SiMe3)Sc(CH2SiMe3)2(THF) (10 mg, 21 μmol) and [Ph3C][B(C6F5)4] (19 mg, 21 μmol) were added, and toluene (30 ml)was further added. To the obtained solution a mixture of styrene (2.148 g, 21 mmol) and isoprene (1.431 g, 21 mmol) was added, and the whole was subjected to a polymerization reaction at 25° C. After 12 hours, methanol was added to stop the polymerization reaction. The reaction mixture was poured into methanol (200 ml) to precipitate a polymer. The precipitated polymer was filtrated, and dried at 60° C. under reduced pressure, to thereby obtain 1.64 g of isoprene-styrene copolymer.

Workup

  1. additionwas added
  2. customthe whole was subjected to a polymerization reaction at 25° C
  3. customthe polymerization reaction
  4. customto precipitate a polymer
  5. filtrationThe precipitated polymer was filtrated
  6. customdried at 60° C. under reduced pressure

Sources & evidence

ORD record
ord-75aee9b5542a48bb9ac3a9fd2296131e
Source dataset
uspto-grants-2011_08
Patent number
US07994267B2

Reaction notes

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