3-(Phenylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide → Phenyl isocyanate

HRID 1112333Notes

Reaction equation

HRID 1112333 reaction equation
[C:1]1([NH:7][C:8](OC2C(O)=C(C3C=CC=CC=3)S(=O)(=O)C=2C2C=CC=CC=2)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1>ClC1C=CC=CC=1Cl>[C:1]1([N:7]=[C:8]=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

3

Reactant 1

HCID 227636553-(Phenylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide

Product 1

HCID 7672Phenyl isocyanate

Reagents, catalysts & solvents 1

HCID 72391,2-DichlorobenzeneSolvent

Procedure

2.1 g of 3-(phenylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide in 50 ml of o-dichlorobenzene are heated at 150° C. for 2 hours. The phenyl isocyanate formed is then distilled off under reduced pressure produced by a water pump.

Sources & evidence

ORD record
ord-96f2533890464c4e809c0b27a6210780
Source dataset
uspto-grants-1978_10
Patent number
US04122090

Reaction notes

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