aluminium trichloride; phosphorus trichoride 2 h; Heating; Yields of byproduct given;

trifluorormethanesulfonic acid in dichloromethane 12 h; Reflux;

1: 1-(Methylthio)-4-fluorobenzene With n-butyllithium in tetrahydrofuran; hexane T=-50°C; Metallation; 6 h; 2: methyl iodide in tetrahydrofuran; hexane T=20°C; Methylation; 3 h; Title compound not separated from byproducts;

triethylamine in acetone

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