Phenyl isocyanate → HCID 569822, compound

HRID 508383Notes

Reaction equation

HRID 508383 reaction equation
[OH-].[K+].[C:3]([OH:11])(=[S:10])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[NH2:12]OS(O)(=O)=O.C1(N=C=O)C=CC=CC=1>O>[C:3]([S:10][NH2:12])(=[O:11])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1

Participants

6

Reactant 4

HCID 7672Phenyl isocyanateHCID 14797Potassium HydroxideHCID 76284hydroxylamine-O-sulfonic acidHCID 178526132HCID 178526132, compound

Product 1

HCID 569822HCID 569822, compoundYield 60%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a stirred solution of KOH (560 mg, 10 mmol) in water (15 mL) was added thiobenzoic acid (690 mg, 5 mmol) and hydroxylamine-O-sulfonic acid (565 mg, 5 mmol). The solution was stirred for 20 min at room temperature. The white solid (S-benzoylthiohydroxylamine) was collected by filtration and then dissolved in CH2Cl2 (10 mL). To this mixture was added phenyl isocyanate (1.19 g, 10 mmol). The resulting solution was allowed to stir overnight at room temperature. The crude product was collected by the filtration and recrystallized in CH2Cl2/hexane. Pure compound 14 was obtained as a white solid (overall yield 60%). m.p. 184-186° C.; 1H NMR (300 MHz, DMSO-d6) δ 9.11 (s, 1H), 7.99 (s, 1H), 7.88 (d, 7.5 Hz, 2H), 7.74 (t, J=8.1 Hz, 1H), 7.59 (t, J=7.5 Hz, 2H), 7.45 (d, J=7.5 Hz, 2H), 7.24 (t, J=7.8 Hz, 2H), 6.98 (t, J=7.2 Hz, 1H); 13C NMR (75 MHz, DMSO-d6) δ 193.4, 155.0, 140.1, 135.2, 134.6, 130.1, 129.4, 127.2, 123.1, 119.3; IR (thin film) cm−1 3286, 3240, 1697, 1638, 1541, 1474, 1459, 1207; MS m/z 273.1 [M+H]+; calcd for C14H13N2O2S 273.1.

Workup

  1. filtrationThe white solid (S-benzoylthiohydroxylamine) was collected by filtration
  2. dissolutiondissolved in CH2Cl2 (10 mL)
  3. stirringto stir overnight at room temperature
  4. filtrationThe crude product was collected by the filtration
  5. customrecrystallized in CH2Cl2/hexane

Sources & evidence

ORD record
ord-27b971eee2c54edf8f2b06453e1ca0a7
Source dataset
uspto-grants-2015_08
Patent number
US09096504B2

Reaction notes

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