Carbon Disulfide → HCID 178426107, compound

HRID 216557Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[C:10]([C:19]([NH:21][NH2:22])=[O:20])=[CH:11][C:12]3[NH:16][CH:15]=[N:14][C:13]=3[C:17]=2[F:18])=[C:4]([CH3:23])[CH:3]=1.[C:24](=S)=[S:25].[OH-].[K+]>CCO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[C:10]([C:19]3[O:20][C:24]([SH:25])=[N:22][N:21]=3)=[CH:11][C:12]3[NH:16][CH:15]=[N:14][C:13]=3[C:17]=2[F:18])=[C:4]([CH3:23])[CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

6-(4-Chloro-2-methyl-phenylamino)-7-fluoro-3H-benzoimidazole-5-carboxylic acid hydrazide 20b (0.050 g, 0.150 mmol) is suspended in 3 mL absolute EtOH and cooled to 0° C. under N2. CS2 is added (26 mg, 0.346 mmol) followed by powdered KOH (8 mg, 0.150 mmol). After stirring at 0° C. for 30 minutes, the reaction mixture is heated to reflux. After 3.5 hours, the reaction mixture is quenched by the addition of water, followed by the addition of ethyl acetate and 1N HCl. The layers are separated and the aqueous layer is extracted with ethyl acetate. The combined organic extracts are dried (Na2SO4) and concentrated under reduced pressure to give the desired product as a yellow solid: LC/MS ESI (+) m/z 376, 378 (M+ Cl pattern) detected; 1H NMR (400 MHz, DMSO-d6) δ 8.51 (s, 1H), 7.92 (s, 1H), 7.19 (s, 1H), 7.12 (s, 1H), 6.98 (d, 1H), 6.29 (d, 1H), 2.28 (s, 3H).

Workup

temperaturethe reaction mixture is heated to reflux
waitAfter 3.5 hours
customthe reaction mixture is quenched by the addition of water
additionfollowed by the addition of ethyl acetate and 1N HCl
customThe layers are separated
extractionthe aqueous layer is extracted with ethyl acetate
dry with materialThe combined organic extracts are dried (Na2SO4)
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-06372eeeba624a98bd8948277d6f7f1d
Source dataset: uspto-grants-2012_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08193230B2

Reaction notes

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