Toluene → 4-chloro-N-methylbenzothiazolone

HRID 847804

Reaktionsgleichung

Reaktionsgleichung von HRID 847804
[Cl:1][C:2]1[C:7]2[N:8]=[CH:9][S:10](=[O:11])[C:6]=2[CH:5]=[CH:4][CH:3]=1.[OH-].[Na+].[C:14]1(C)C=CC=CC=1.S(OC)(OC)(=O)=O>O.[Br-].C([N+](CCCC)(CCCC)CCCC)CCC>[Cl:1][C:2]1[C:7]2[N:8]([CH3:14])[CH2:9][S:10](=[O:11])[C:6]=2[CH:5]=[CH:4][CH:3]=1

Komponenten

7

Edukt 4

HCID 1140TolueneHCID 6497Dimethyl SulfateHCID 14798Sodium HydroxideHCID 534006884-Chlorobenzothiazolone

Produkt 1

HCID 696450104-chloro-N-methylbenzothiazoloneAusbeute 98,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 74236Tetrabutylammonium BromideKatalysatorHCID 962WaterLösungsmittel

Versuchsvorschrift

4-Chlorobenzothiazolone (9.28 g, 0.05 mole) was dissolved in a solution of sodium hydroxide (3.19 g, 0.075 mole) in water (220 ml), and tetra-n-butylammonium bromide (0.48 g, 0.0015 mole) and toluene (80 ml) were added thereto. Dimethyl sulfate (9.40 g, 0.075 mole) was added dropwise thereto at room temperature, and the mixture was stirred at room temperature for 1 hour, followed by phase-separation. The toluene layer was washed once with water, and the solvent was removed under reduced pressure to obtain 9.80 g of 4-chloro-N-methylbenzothiazolone as pale yellow crystals. Yield 98.2%, purity 98.2%, m.p. 130°-132° C.

Aufarbeitung

  1. additionwere added
  2. customfollowed by phase-separation
  3. washThe toluene layer was washed once with water
  4. customthe solvent was removed under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-a244a87ea35445fa86cd33d441bf9140
Quelldatensatz
uspto-grants-1981_10
Patentnummer
US04293702

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