Isoprene → HCID 19842620, compound

HRID 857811Notes

Reaction equation

HRID 857811 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.C([Li])(CC)C.CN(CCN(C)C)C.[CH2:22]=[CH:23][C:24](=[CH2:26])[CH3:25]>C1CCCCC1>[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH2:22]=[CH:23][C:24](=[CH2:25])[CH3:26].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

6

Reactant 4

HCID 6557IsopreneHCID 7501Styrene2×HCID 8037N,N,N',N'-TetramethylethylenediamineHCID 178418400CID 53628100

Product 1

HCID 19842620HCID 19842620, compound

Reagents, catalysts & solvents 1

HCID 8078CyclohexaneSolvent

Procedure

In a pressure-resistant container replaced with dry nitrogen, styrene was polymerized at 60° C. using cyclohexane as a solvent and s-butyllithium as a polymerization initiator, TMEDA was added thereto as a Lewis base, and thereafter isoprene and styrene were successively polymerized thereto to give a styrene-isoprene-styrene block copolymer. The resulting block copolymer was hydrogenated in cyclohexane under a hydrogen atmosphere at a hydrogen pressure of 2 MPa using Pd/C as a catalyst, to give a hydrogenated block copolymer (the hydrogenated block copolymer obtained in Preparation Example 4 being hereinafter simply referred to as a block copolymer 4). The content of styrene, the number-average molecular weight, the content of vinyl bonds and the hydrogenation rate of the resulting block copolymer 4 are shown in Table 1.

Workup

  1. customwas polymerized at 60° C.

Sources & evidence

ORD record
ord-b8baf13fabc74010a4ef6b10a29d71d9
Source dataset
uspto-grants-2006_12
Patent number
US07147905B2

Reaction notes

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