Aniline → N-benzene sulfonyl phenyl cyanamide

HRID 1679480Notes

Reaction equation

HRID 1679480 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1N2C[CH2:15][N:10](CC2)C1.[C:16]1([S:22](Cl)(=[O:24])=[O:23])[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.N#CCl>C1COCC1>[C:16]1([S:22]([N:1]([C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)[C:15]#[N:10])(=[O:24])=[O:23])[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

Participants

6

Reactant 4

HCID 6115AnilineHCID 7369Benzenesulfonyl chlorideHCID 9237DabcoHCID 10477Cyanogen Chloride

Product 1

HCID 21323003N-benzene sulfonyl phenyl cyanamide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent3×

Procedure

To a 3 liter 3-necked flask equipped with a stirrer, addition funnel, thermometer, and drying tube was charged 93.1g (1.0 mole) of aniline, 111g (1.1 moles) of triethylene diamine and 250 ml. of tetrahydrofuran. To this reaction mixture was added dropwise a solution of 176.6g (1 mole) of benzenesulfonyl chloride in 300 ml. of tetrahydrofuran. The reaction mixture was stirred at room temperature for 2.5 hours and was then filtered. To the filtrate was added 111g of triethylene diamine and this solution was added dropwise to a solution of 87g (1.41 moles) of cyanogen chloride in 100 ml. of THF which was maintained at -5° C. with cooling. After this addition was complete the stirred reaction mixture was allowed to return to room temperature over a 161/2 hour period. The reaction mixture was filtered and the filament was added to water to precipitate the product. The product was recrystallized from aqueous methanol to yield 218g (84.7%) of N-benzene sulfonyl phenyl cyanamide, m.p. 65°-66° C.

Workup

  1. customTo a 3 liter 3-necked flask equipped with a stirrer, addition funnel
  2. customthermometer, and drying tube
  3. filtrationwas then filtered
  4. additionTo the filtrate was added 111g of triethylene diamine
  5. temperaturewith cooling
  6. additionAfter this addition
  7. customthe stirred reaction mixture
  8. customto return to room temperature over a 161
  9. custom2 hour period
  10. filtrationThe reaction mixture was filtered
  11. additionthe filament was added to water
  12. customto precipitate the product
  13. customThe product was recrystallized from aqueous methanol

Sources & evidence

ORD record
ord-d32684153bef48a4ae8ba314fb530b4b
Source dataset
uspto-grants-1978_03
Patent number
US04080483

Reaction notes

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