Carbon Disulfide → Benzyl Isothiocyanate

HRID 1090437Notes

Reaction equation

HRID 1090437 reaction equation
C1(N=C=NC2CCCCC2)CCCCC1.[C:16](=[S:18])=S.[CH2:19]([NH2:26])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>CCOCC>[CH2:19]([N:26]=[C:16]=[S:18])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1

Participants

5

Reactant 3

HCID 6348Carbon DisulfideHCID 7504BenzylamineHCID 10868Dicyclohexylcarbodiimide

Product 1

HCID 2346Benzyl IsothiocyanateYield 62%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent2×

Procedure

Dicyclohexylcarbodiimide (10.3 g) and carbon disulphide (20 ml) are stirred in a round-bottomed flask with 20 ml of diethyl ether at -10° C. Benzylamine (5.35 g, 5.5 ml) in 20 ml ether is added slowly when a white precipitate forms immediately. The reaction mixture is stirred overnight, filtered and the ether removed in vacuo. The residue is suspended in ether, filtered and the ether removed in vacuo. The remaining oil is distilled under vacuum (0.5 mm, 100° C. approx.) to give benzylisothiocyanate as an oil (4.7 g, 62%).

Workup

  1. filtrationfiltered
  2. customthe ether removed in vacuo
  3. filtrationfiltered
  4. customthe ether removed in vacuo
  5. distillationThe remaining oil is distilled under vacuum (0.5 mm, 100° C. approx.)

Sources & evidence

ORD record
ord-afaf05e0d7b94c7e89fa07b72ecc719e
Source dataset
uspto-grants-1992_01
Patent number
US05081282

Reaction notes

Loading…