Hexamethyldisilazane → HCID 178498124, compound

HRID 1462198Notes

Reaction equation

HRID 1462198 reaction equation
[O:1]1[CH2:6][C:5](=O)[NH:4][C:3](=[O:8])[NH:2]1.[NH2:9][C:10]1[CH:18]=[CH:17][C:13]([C:14]([O-:16])=[O:15])=[C:12](C)[CH:11]=1.[CH3:20][Si](C)(C)N[Si](C)(C)C>S([O-])([O-])(=O)=O.[NH4+].[NH4+].O1CCOCC1>[O:8]=[C:3]1[N:4]=[C:5]([NH:9][C:10]2[CH:18]=[CH:17][C:13]([C:14]([O:16][CH3:20])=[O:15])=[CH:12][CH:11]=2)[CH2:6][O:1][NH:2]1

Participants

6

Reactant 3

HCID 13838HexamethyldisilazaneHCID 642154HCID 642154, compoundHCID 22600504HCID 22600504, compound

Product 1

HCID 178498124HCID 178498124, compoundYield 63%

Reagents, catalysts & solvents 2

HCID 6097028Ammonium SulfateCatalystHCID 312751,4-DioxaneSolvent

Procedure

A solution of 1.16 g (0.010 mole) of 6H-1,2,4-oxadiazin-3,5(2H,4H)-dione, 5 mg ammonium sulfate, 1.80 g (0.012 mole) of p-amino-methylbenzoate and 20 ml hexamethyldisilazane in 40 ml freshly distilled dry dioxane is refluxed for 17 hours. After cooling, the dioxane and hexamethyldisilazane are removed in vacuo and the syrupy residue is dried on a vacuum pump for 2 hours. The resulting semi-solid residue is triturated with 100 ml of petroleum ether and filtered to yield 1.56 g (63 percent) of 4-((3,6-dihydro-3-oxo-2H-1,2,4-oxadiazin-5-yl)amino)benzoic acid, methyl ester.

Workup

  1. temperatureis refluxed for 17 hours
  2. temperatureAfter cooling
  3. customthe dioxane and hexamethyldisilazane are removed in vacuo
  4. customthe syrupy residue is dried on a vacuum pump for 2 hours
  5. customThe resulting semi-solid residue is triturated with 100 ml of petroleum ether
  6. filtrationfiltered

Sources & evidence

ORD record
ord-4d18aff7e10745c08310f7075840f089
Source dataset
uspto-grants-1984_07
Patent number
US04459403

Reaction notes

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