4-Fluorobenzene-1,2-diamine → HCID 22139853, compound

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Reaction Steps

4-Fluoro-1,2-phenylendiamine (900 mg) was dissolved in THF (25 ml) and 4-chloro-3-thienylisothiocyanat (example 52c), dissolved in THF (15 ml), was added with stirring. The solution was stirred for about 3 h at room temperature and stood overnight. Then the reaction mixture was concentrated und the residue purified by preparative HPLC. The product containing fractions were combined, the acetonitrile was removed, the aqueous residue made basic and three times extracted with ethyl acetate. The organic layers were combined, dried (MgSO4) and filtered. After removal of the solvent the desired product (625 mg) was obtained.

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