1,2-Dichloro-3-isocyanatobenzene → HCID 9911041, compound

HRID 2301501Notes

Reaction equation

HRID 2301501 reaction equation
[CH3:1][N:2]([CH3:15])[S:3]([C:6]1[C:11]([Cl:12])=[CH:10][CH:9]=[C:8]([NH2:13])[C:7]=1[OH:14])(=[O:5])=[O:4].[Cl:16][C:17]1[C:22]([Cl:23])=[CH:21][CH:20]=[CH:19][C:18]=1[N:24]=[C:25]=[O:26]>CN(C)C=O.C(OCC)(=O)C>[Cl:12][C:11]1[CH:10]=[CH:9][C:8]([NH:13][C:25]([NH:24][C:18]2[CH:19]=[CH:20][CH:21]=[C:22]([Cl:23])[C:17]=2[Cl:16])=[O:26])=[C:7]([OH:14])[C:6]=1[S:3]([N:2]([CH3:15])[CH3:1])(=[O:5])=[O:4]

Participants

5

Reactant 2

HCID 330501,2-Dichloro-3-isocyanatobenzeneHCID 23447758N,N-Dimethyl-3-amino-6-chloro-2-hydroxybenzenesulfonamide

Product 1

HCID 9911041HCID 9911041, compoundYield 45%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of N,N-dimethyl-3-amino-6-chloro-2-hydroxybenzenesulfonamide (80 mg, 0.32 mmol) and 2,3-dichlorophenylisocyanate (50 μL, 0.38 mmol) in 2 mL of N,N-dimethylformamide was stirred at room temperature for 20 hours. The mixture was diluted with ethyl acetate and washed with water to give the crude material. Purification by column chromatography on silica gel, eluting with ethyl acetate/hexane (20/80, v/v), followed by recrystallization from ethyl acetate and hexane, gave the desired product (63 mg, 45%). 1H NMR (DMSO-d6): δ 10.51 (s, 1H), 9.34 (s, 1H), 9.27 (s, 1H), 8.29 (d, 1H), 7.32 (m, 2H), 7.16 (d, 1H), 2.87 (s, 6H).

Workup

  1. washwashed with water
  2. customto give the crude material
  3. customPurification by column chromatography on silica gel
  4. washeluting with ethyl acetate/hexane (20/80
  5. customv/v), followed by recrystallization from ethyl acetate and hexane

Sources & evidence

ORD record
ord-d64ac17cdc1946a09c5399fb5b88cd09
Source dataset
uspto-grants-2002_12
Patent number
US06500863B1

Reaction notes

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