Melamine → Methylphosphonic acid melamine salt

HRID 1614661Notes

Reaction equation

HRID 1614661 reaction equation
[CH3:1][P:2](=[O:5])([OH:4])[OH:3].[N:6]1[C:13]([NH2:14])=[N:12][C:10]([NH2:11])=[N:9][C:7]=1[NH2:8]>O>[N:6]1[C:13]([NH2:14])=[N:12][C:10]([NH2:11])=[N:9][C:7]=1[NH2:8].[CH3:1][P:2](=[O:3])([OH:5])[OH:4]

Participants

4

Reactant 2

HCID 7955MelamineHCID 13818Methylphosphonic acid

Product 1

HCID 21951458Methylphosphonic acid melamine salt

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

A solution of methylphosphonic acid (28.8 parts, 0.3 mol) in water (50 milliliters) is added dropwise to a suspension of melamine (37.8 parts, 0.3 mol) in water (500 milliliters) at refluxing temperatures over 30 mins. A clear solution is formed. Heating is continued for a further 2 hours and the reaction mixture is evaporated to dryness under reduced pressure. The solid product is collected, washed with methanol and dried at 80° C. under vacuum to give 64 parts of methylphosphonic acid melamine salt having melting point >250° C.

Workup

  1. temperatureat refluxing temperatures over 30 mins
  2. customA clear solution is formed
  3. temperatureHeating
  4. customthe reaction mixture is evaporated to dryness under reduced pressure
  5. customThe solid product is collected
  6. washwashed with methanol
  7. customdried at 80° C. under vacuum

Sources & evidence

ORD record
ord-27e5a55eb7d44aa2872968fcaf409985
Source dataset
uspto-grants-1993_03
Patent number
US05198483

Reaction notes

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