Sodium Hydroxide → 2,3-Difluoro-1,4-di(2-thienyl)-5,6-diamino-benzene

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Reaction Steps

2,3-difluoro-1,4-di(2-thienyl)-5,6-dinitro-benzene (3.0 g, 8.15 mmol), iron powder (5.5 g, 98 mmol) and acetic acid (100 ml) were stirred at 45° C. for 4 h. Then the mixture was poured into cold 5% NaOH solution (250 ml) and extracted with diethyl ether three times. The ether phase was washed with NaHCO3 solution, dried over MgSO4 and concentrated. Purification with column chromatograph afforded 2,3-difluoro-1,4-di(2-thienyl)-5,6-diamino-benzene as yellow powder (2.1 g, 84%). 1H and 19F NMR spectra were as expected.

Provenance & Evidence