Melamine → Methylphosphonic acid melamine salt

HRID 2371566

Reaction equation

HRID 2371566 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. Calculated for C4H11N6O3P: %C 21.62, %H 4.95, %N 37.84, %P 13.96. Found: %C 21.51, %H 4.80, %N 37.64, %P 13.66.

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-57060f45c1f74f169c158b1cde9d7a22
Source dataset
uspto-grants-1992_03
Patent number
US05093494

Linked notes

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