2-(3-Chlorophenoxy)ethanethioamide → 2-((3-Chlorophenoxy)methyl)-4-(2-fluorophenyl)-5-(4-methylthiophenyl)thiazole

HRID 1378598Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8](=O)[CH:9]([C:11]1[CH:16]=[CH:15][C:14]([S:17][CH3:18])=[CH:13][CH:12]=1)Br.[Cl:20][C:21]1[CH:22]=[C:23]([CH:29]=[CH:30][CH:31]=1)[O:24][CH2:25][C:26]([NH2:28])=[S:27]>C(#N)C.CO>[Cl:20][C:21]1[CH:22]=[C:23]([CH:29]=[CH:30][CH:31]=1)[O:24][CH2:25][C:26]1[S:27][C:9]([C:11]2[CH:16]=[CH:15][C:14]([S:17][CH3:18])=[CH:13][CH:12]=2)=[C:8]([C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=2[F:1])[N:28]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A solution of 1-(2-fluorophenyl)-2-(4-methylthiophenyl)-2-bromo ethanone, (1.64 g, 4.8 mmol) (Example 34, Step 3) and 3-chlorophenoxy thioacetamide (0.98 g, 4.8 mmol) in 25 mL of acetonitrile was heated to reflux for 14 hours. The solution was diluted with methanol, cooled to 0° C. in an ice bath and a precipitate formed that was removed by filtration to provide pure 2-((3-chlorophenoxy)methyl)-4-(2-fluorophenyl)-5-(4-methylthiophenyl)thiazole (0.69 g; 32%). The filtrate was concentrated in vacuo, and the residue dissolved in ethyl acetate, washed with water, brine, dried over anhydrous MgSO4, filtered and concentrated in vacuo to provide additional product that was crystallized from a mixture of dichloromethane and isooctane to provide 200 mg of additional material for a total yield of 890 mg (42%): mp 115°-118° C.: 1H NMR (CDCl3) 300 MHz 7.52-6.90 (m, 12H), 5.38 (s, 2H), 2.46 (s, 3H). 19F NMR (CDCl3) -113.61 (m). High resolution mass spectrum calc'd. for C23H17ClFNOS2 (M+): 441.0424. Found: 441.0467.

Workup

temperatureto reflux for 14 hours
customa precipitate formed
customthat was removed by filtration

Sources & evidence

ORD record: ord-fd237f381750413db083f122096a57cb
Source dataset: uspto-grants-1997_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05668161

Reaction notes

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