2-[2-(5-Methyl-2-phenyl-4-oxazolyl)ethoxy)-5-nitropyridine → 5-Amino-2-[2-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]pyridine

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Reaction Steps

A mixture of 2-[2-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]-5-nitropyridine (13.4 g), palladium carbon (5%, 1.5 g) and ethyl acetate (200 ml) methanol (150 ml) was subjected to catalytic hydrogenation at room temperature under 1 atmospheric pressure. The catalyst was filtered off, and the filtrate was concentrated under reduced pressure to leave crystals. The crystals were collected by filtration to obtain 5-amino-2-[2-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]pyridine (11.4 g, 93%), which was recrystallized from ethyl acetate--hexane to give brown crystals, m.p.107°-108° C.

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