L-Pyroglutamic Acid → L-Pyroglutamic Acid

HRID 585631Notes

Reaction equation

HRID 585631 reaction equation
[NH:1]1[C:5](=[O:6])[CH2:4][CH2:3][C@H:2]1[C:7]([OH:9])=[O:8].[CH2:10]=[CH:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.[CH2:18]=[CH:19][CH:20]=[CH2:21].CN(CCN(C)C)C.[Li]CCCC>CCCCCC>[NH:1]1[C:5](=[O:6])[CH2:4][CH2:3][C@H:2]1[C:7]([OH:9])=[O:8].[CH2:10]=[CH:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.[CH2:18]=[CH:19][CH:20]=[CH2:21]

Participants

8

Reactant 5

HCID 7405L-Pyroglutamic Acid2×HCID 7501Styrene2×HCID 78451,3-ButadieneHCID 8037N,N,N',N'-TetramethylethylenediamineHCID 178418339Butyllithium

Product 2

HCID 7405L-Pyroglutamic AcidHCID 62697Benzene, ethenyl-, polymer with 1,3-butadiene

Reagents, catalysts & solvents 1

HCID 8058HexaneSolvent

Procedure

In this experiment, a 0.5/19.5/80 Pyr-AMS/styrene/1,3-butadiene terpolymer was prepared. The procedure described in Example 1 was used except that a premix containing Pyr-AMS, styrene and 1,3-butadiene in hexane at a weight ratio of 0.5:19.5:80 was used as the monomer premix solution and the molar ratio of potassium 3,7-dimethyl-3-octanoxide to TMEDA to n-BuLi was 0.015:2:1. The GC analysis of residual monomer again showed that polymerization rates of the three monomers were almost identical indicating that both Pyr-AMS and styrene were randomly distributed along the polymer chain.

Workup

  1. additionpremix solution
  2. customThe GC analysis of residual monomer again showed that polymerization rates of the three monomers

Sources & evidence

ORD record
ord-7219366de388406f92a75ab2daf35433
Source dataset
uspto-grants-2005_08
Patent number
US06933358B2

Reaction notes

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