2-Pyrrolidone → 2-Pyrrolidone

HRID 1982195Notes

Reaction equation

HRID 1982195 reaction equation
[NH:1]1[CH2:5][CH2:4][CH2:3][C:2]1=[O:6].C[N:8]1[CH2:12][CH2:11][CH2:10][C:9]1=[O:13]>>[NH:1]1[CH2:5][CH2:4][CH2:3][C:2]1=[O:6].[CH3:2][CH:12]1[NH:8][C:9](=[O:13])[CH2:10][CH2:11]1

Participants

4

Reactant 2

HCID 120252-PyrrolidoneHCID 13387N-methyl-2-pyrrolidone

Product 2

HCID 120252-PyrrolidoneHCID 660555-Methyl-2-pyrrolidone

Procedure

In general, even a minimal amount of 2-oxo-1-pyrrolidinyl groups in the reaction admixture of lactam, lactam polymerization initiator and lactam polymerization catalyst is effective in increasing the polymerization rate. The 2-oxo-1-pyrrolidinyl compounds can be any one of 2-pyrrolidinone, initiator compound capped with 2-oxo-1-pyrrolidinyl groups and 2-oxo-1-pyrrolidinyl magnesium halide and can therefor be added in the lactam initiator solution or in the catalyst stream or in both. Preferably all the 2-oxo-1-pyrrolidinyl compound is added in the initiator stream and more preferably it is all present as 2-oxo-1-pyrrolidinyl capped initiator. In contrast to 2-pyrrolidinone, other derivatives of pyrrolidinone such as N-methyl-2-pyrrolidinone and 5-methyl-2-pyrrolidinone provided no accelerating effect.

Workup

  1. temperaturein increasing the polymerization rate

Sources & evidence

ORD record
ord-787e6b10085345229d87c896353eba73
Source dataset
uspto-grants-1986_06
Patent number
US04595746

Reaction notes

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