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

HRID 372666Notes

Reaction equation

HRID 372666 reaction equation
[CH2:1]=[CH:2][C:3](=[CH2:5])[CH3:4].[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[Li]CCCC>CCCCCCC>[CH2:1]=[CH:2][C:3](=[CH2:4])[CH3:5].[CH2:6]=[CH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1

Participants

5

Reactant 3

HCID 6557Isoprene2×HCID 7501StyreneHCID 178418339Butyllithium

Product 1

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

Reagents, catalysts & solvents 1

HCID 8900HeptaneSolvent

Procedure

One operates under the same polymerization conditions in 250 cc. Steinie bottles, in heptane medium (123 g.) with 9.24 g. of isoprene and 3.08 g. of styrene (25% referred to the isoprene). Copolymerization is effected for 2 hours at 70° C. in the presence of 50 × 10-6 moles of active n-BuLi.

Workup

  1. customOne operates under the same polymerization conditions in 250 cc
  2. customCopolymerization

Sources & evidence

ORD record
ord-fcc9e40c2e05430f89a4dd58849a0fd1
Source dataset
uspto-grants-1978_05
Patent number
US04092268

Reaction notes

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