[CH:1]([O:4][C:5]1[CH:6]=[C:7]([CH:10]=[C:11]([C:13]([F:16])([F:15])[F:14])[CH:12]=1)[C:8]#[N:9])([CH3:3])[CH3:2].O.[SH2:18].[Na].O.O.O.O.O.O.[Cl-].[Mg+2].[Cl-].C(OCC)(=O)C.CCCCCC>CN(C=O)C>[CH:1]([O:4][C:5]1[CH:6]=[C:7]([CH:10]=[C:11]([C:13]([F:14])([F:15])[F:16])[CH:12]=1)[C:8](=[S:18])[NH2:9])([CH3:3])[CH3:2]3-Isopropoxy-5-(trifluoromethyl)benzonitrile (1000 g, 4.3 moles) was dissolved in DMF (4000 mL) and sodium hydrogensulfide hydrate (636 g; 8.6 moles) was added followed by magnesium chloride hexahydrate (960.2 g, 4.7 moles). The reaction mixture was stirred for 1 hr at 25 to 30° C. Reaction completion was monitored by TLC using ethyl acetate:hexane (2:8) as the mobile phase. The reaction mixture was quenched in an ice-water slurry (250 mL) and the pH was adjusted to 5 by addition of 10% aqueous HCl. The reaction mixture was extracted with MTBE and was washed with 20% brine solution. The organic layer was concentrated under vacuum to give 1136 g (4.3 moles; 100%) of the title compound, which was taken as such to next step. HPLC purity—97.37% a/a.
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