Toluene → 4-chloro-N-methylbenzothiazolone

HRID 847805

반응식

HRID 847805 반응식
[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.[Cl-].C([N+](CC)(CC)CC)C1C=CC=CC=1>[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

참가 물질

7

반응물 4

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

생성물 1

HCID 696450104-chloro-N-methylbenzothiazolone수율 90.3%

시약·촉매·용매 2

HCID 66133Benzyl triethylammonium chloride촉매HCID 962Water용매

실험 절차

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 benzyltriethylammonium chloride (0.34 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 4 hours, followed by phase-separation. The toluene layer was washed once with water, and the solvent was removed under reduced pressure to obtain 8.97 g of 4-chloro-N-methylbenzothiazolone as pale yellow crystals. Yield 90.3%, purity 96.7%, m.p. 129°-131° C.

후처리

  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

출처 및 근거

ORD 기록
ord-d646ea01e9074c4ab6ceb304c2449f60
출처 데이터셋
uspto-grants-1981_10
특허 번호
US04293702

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