Lawesson's reagent → 8-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carbothioic acid (2-chloro-phenyl)-amide

HRID 84593Notes

Reaction equation

HRID 84593 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[NH:8][C:9]([C:11]1[S:12][C:13]2[CH2:14][CH2:15][O:16][C:17]3[CH:24]=[C:23]([Br:25])[CH:22]=[CH:21][C:18]=3[C:19]=2[N:20]=1)=O.COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:35])=CC=1>C1(C)C=CC=CC=1>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[NH:8][C:9]([C:11]1[S:12][C:13]2[CH2:14][CH2:15][O:16][C:17]3[CH:24]=[C:23]([Br:25])[CH:22]=[CH:21][C:18]=3[C:19]=2[N:20]=1)=[S:35]

Participants

4

Reactant 2

HCID 87949Lawesson's reagentHCID 668689618-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (2-chloro-phenyl)-amide

Product 1

HCID 866348468-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carbothioic acid (2-chloro-phenyl)-amideYield 74.2%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of 8-bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (2-chloro-phenyl)-amide (260 mg), Lawesson's reagent (193 mg) and toluene (10 mL) was heated to reflux. After 5 hours, the reaction mixture was cooled and the precipitate was collected by filtration to yield the corresponding thioamide, 8-bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carbothioic acid (2-chloro-phenyl)-amide (160 mg).

Workup

  1. temperaturewas heated to reflux
  2. temperaturethe reaction mixture was cooled
  3. filtrationthe precipitate was collected by filtration

Sources & evidence

ORD record
ord-4e951da36d544ae3a6211a07e07dbc6e
Source dataset
uspto-grants-2014_09
Patent number
US08846762B2

Reaction notes

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