Sulfuryl chloride → Amidosulfuron

HRID 1416432

Reaktionsgleichung

Reaktionsgleichung von HRID 1416432
[S:1](Cl)(Cl)(=[O:3])=[O:2].[O-:6][C:7]#[N:8].[Na+].[CH3:10][NH:11][S:12]([CH3:15])(=[O:14])=[O:13].[NH2:16][C:17]1[N:22]=[C:21]([O:23][CH3:24])[CH:20]=[C:19]([O:25][CH3:26])[N:18]=1>O.C(#N)C>[CH3:15][S:12]([N:11]([S:1]([NH:8][C:7]([NH:16][C:17]1[N:18]=[C:19]([O:25][CH3:26])[CH:20]=[C:21]([O:23][CH3:24])[N:22]=1)=[O:6])(=[O:3])=[O:2])[CH3:10])(=[O:14])=[O:13]

Komponenten

7

Edukt 4

HCID 24648Sulfuryl chlorideHCID 97632N-MethylmethanesulfonamideHCID 1189462-Amino-4,6-dimethoxypyrimidineHCID 517096Sodium Cyanate

Produkt 1

HCID 91777AmidosulfuronAusbeute 82,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6342AcetonitrileLösungsmittel

Reaktionsbedingungen

Temperatur
20 °C

Versuchsvorschrift

340 g (2.52 mol) of sulfuryl chloride are introduced into 1.5 l of acetonitrile, and 260 g (4.0 mol) of sodium cyanate are added in portions within the space of 20 min while stirring vigorously (20° C.). The mixture is stirred for a further 15 min and then 222 g (2.0 mol) of N-methylmethanesulfonamide are added dropwise at 25° C., the temperature is raised slowly and the mixture is heated to reflux for 200 min while stirring vigorously. Subsequently, the excess sulfuryl chloride is distilled off with the solvent under 100 mbar up to an internal temperature of 50° C. After releasing the pressure under nitrogen, 1.5 l of acetonitrile (optionally also toluene etc.) are added and 155 g (1.0 mol) of 2-amino-4,6-dimethoxy-pyrimidine are introduced at 0° C. After 75 min, 1.0 l of water is added and the precipitate is separated off and washed. 304 g of 1-[(N-methylsulfonyl-N-methyl-amino)-sulfonyl]-3-(4,6-dimethoxy-2-pyrimidyl)-urea are obtained with a melting point of 176 to 178° C. The product is in accordance with a comparison sample and, according to analysis by high pressure liquid chromatography (HPLC), has a purity of 96%; yield: 77% of theory.

Aufarbeitung

  1. additionare added in portions within the space of 20 min
  2. stirringThe mixture is stirred for a further 15 min
  3. temperaturethe temperature is raised slowly
  4. temperaturethe mixture is heated
  5. temperatureto reflux for 200 min
  6. stirringwhile stirring vigorously
  7. distillationSubsequently, the excess sulfuryl chloride is distilled off with the solvent under 100 mbar up to an internal temperature of 50° C
  8. addition1.5 l of acetonitrile (optionally also toluene etc.) are added
  9. customthe precipitate is separated off
  10. washwashed

Quellen und Nachweise

ORD-Eintrag
ord-c221dba3e5b84367bbf3b5f667b96d3c
Quelldatensatz
uspto-grants-1999_06
Patentnummer
US05912379

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