反应详情

Lithium aluminum hydride (380 mg, 10.0 mmol) was suspended in tetrahydrofuran (10 ml), and a suspension (10 ml) of 2-(4-chloro-2-methoxyphenyl)-4-methylthiazole-5-carboxylic acid (1.42 g, 5.00 mmol) prepared in Example 7-1 in tetrahydrofuran was added thereto at a room temperature. The mixture was stirred for 3 hours at a room temperature. Under an ice cooling, 5 drops of a saturated sodium bicarbonate solution were slowly added to the mixture. Ethyl acetate was added to the mixture, and another 5 drops of a saturated sodium bicarbonate solution were added thereto. The precipitate was removed by filtration, and the removed solid was washed with chloroform. The washings and the filtrate were concentrated together. The concentrate was purified by silica gel column chromatography (chloroform:methanol=20:1) to give the title compound (580 mg, 43%) as a light-brown powder.

1. customat a room temperature
2. customThe precipitate was removed by filtration
3. washthe removed solid was washed with chloroform
4. concentrationThe washings and the filtrate were concentrated together
5. customThe concentrate was purified by silica gel column chromatography (chloroform:methanol=20:1)