HCID 178470035、化合物 → HCID 178516647、化合物

関与物質

反応条件

反応手順

2,4-Dihydroxy-6-trifluoromethyl-nicotinic acid ethyl ester (62 g/247 mmols) was added in several portions over 30 mins to 6M HCl(aq) (620 mls) at reflux. The resulting mixture was then heated at 100° C. overnight with vigorous stirring to obtain complete solution. The solution was then allowed to cool and concentrated in vacuo to a white solid. This was slurried in water (250 mls) and adjusted to pH 7 with conc. ammonia to get heavy white suspension. The resulting solid was collected by filtration, rinsed through with fresh water, and dried to provide the title compound (44.0 g) as a white solid.

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