Water → (7-Iodo-4-methoxy-benzothiazol-2-yl)-carbamic acid methyl ester

HRID 1063013

Reaktionsgleichung

Reaktionsgleichung von HRID 1063013
[CH3:1][O:2][C:3](=[O:16])[NH:4][C:5]1[S:6][C:7]2[CH:13]=[CH:12][CH:11]=[C:10]([O:14][CH3:15])[C:8]=2[N:9]=1.C([O-])(=O)C.[Na+].[I:22]Cl.O>C(O)(=O)C>[CH3:1][O:2][C:3](=[O:16])[NH:4][C:5]1[S:6][C:7]2[C:13]([I:22])=[CH:12][CH:11]=[C:10]([O:14][CH3:15])[C:8]=2[N:9]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 24640Iodine chlorideHCID 517045Sodium AcetateHCID 21303403(4-Methoxy-benzothiazol-2-yl)-carbamic acid methyl ester

Produkt 1

HCID 60117385(7-Iodo-4-methoxy-benzothiazol-2-yl)-carbamic acid methyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 176Acetic AcidLösungsmittel

Versuchsvorschrift

(4-Methoxy-benzothiazol-2-yl)-carbamic acid methyl ester (31.0 g, 130 mmol) and sodium acetate (32.3 g, 394 mmol) are dissolved in 400 ml of glacial acetic acid and slowly treated with iodine monochloride (13.5 ml, 264 mmol) at 0° C. The reaction mixture is then slowly warmed to room temperature and stirred for 15 hours. After addition of water (1.31), the formed precipitate is filtered off and washed with water. The filter cake is then dissolved in a minimal amount of tetrahydrofurane (about 150 ml) and decolorized with 1M aqueous sodium thiosulfate. The product is precipitated by the addition of water (about 2.0 l), filtered off and dried at 60° C. for 12 hours. 42.3 g (89%) white solid. MS: m/e=364 (M+).

Aufarbeitung

  1. filtrationthe formed precipitate is filtered off
  2. washwashed with water
  3. dissolutionThe filter cake is then dissolved in a minimal amount of tetrahydrofurane (about 150 ml)
  4. customThe product is precipitated by the addition of water (about 2.0 l)
  5. filtrationfiltered off
  6. customdried at 60° C. for 12 hours

Quellen und Nachweise

ORD-Eintrag
ord-63af70d7b9354733b2ab2b3e3911b62b
Quelldatensatz
uspto-grants-2005_11
Patentnummer
US06963000B2

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