2-Bromophenyl isocyanate → N-[3-(N''-Benzylaminosulfonyl)-4-chloro-2-hydroxyphenyl]-N'(2-bromophenyl) urea

HRID 2301499Notes

Reaction equation

HRID 2301499 reaction equation
[CH2:1]([NH:8][S:9]([C:12]1[C:17]([Cl:18])=[CH:16][CH:15]=[C:14]([NH2:19])[C:13]=1[OH:20])(=[O:11])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Br:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=1[N:28]=[C:29]=[O:30]>CN(C)C=O.C(OCC)(=O)C>[CH2:1]([NH:8][S:9]([C:12]1[C:13]([OH:20])=[C:14]([NH:19][C:29]([NH:28][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=2[Br:21])=[O:30])[CH:15]=[CH:16][C:17]=1[Cl:18])(=[O:11])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 2

HCID 1370972-Bromophenyl isocyanateHCID 18373453N-Benzyl-3-amino-6-chloro-2-hydroxybenzenesulfonamide

Product 1

HCID 11627629N-[3-(N''-Benzylaminosulfonyl)-4-chloro-2-hydroxyphenyl]-N'(2-bromophenyl) ureaYield 61%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of N-benzyl-3-amino-6-chloro-2-hydroxybenzenesulfonamide (80 mg, 0.26 mmol) and 2-bromophenylisocyanate (47 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 (30/70 to 70/30, v/v), gave the desired product (80 mg, 61%). EI-MS (m/z) 508.1, 510.2, 512.2 (M−).

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 (30/70 to 70/30, v/v)

Sources & evidence

ORD record
ord-4fb5ca65859f47ce82044d0aca034899
Source dataset
uspto-grants-2002_12
Patent number
US06500863B1

Reaction notes

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