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2H-Benzimidazole-2-thione,1,3-dihydro-1-(1-methylethyl)-(9CI) synthesis

2synthesis methods
3705-87-1 Synthesis
1H-Benzimidazole,2-chloro-1-(1-methylethyl)-(9CI)

3705-87-1
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Yield:2416-65-1 91.4%

Reaction Conditions:

with thiourea in ethanol at 90; for 3 h;

Steps:

22.B Step B: 1-Isopropyl-1H-benzoimidazole-2-thiol (3).

To a solution of 2-Chloro-1- isopropyl-1H-benzoimidazole (1.3 g, 0.57 mmol) in EtOH (50 mL) was added thiourea (800 mg). The reaction mixture was stirred at 90 oC for 3 hours. The reaction mixture solvent was removed under reduced pressure and the residue was purified via column chromatography directly (Petroleum ether/EtOAc) to give title compound (1.02 g, 91.4% yield) as a yellow solid. LC-MS: Calculated exact mass = 192.1; Found [M+H]+ = 193.3.

References:

WO2019/140387,2019,A1 Location in patent:Paragraph 00416; 00418