反应详情

4-(tert-Butyl-dimethyl-silanyloxymethyl)-pyridin-2-ylamine (8-5, 5.94 g, 24.9 mmol) was dissolved in 50 mL anhydrous THF under N2. NaH (60% suspension, 2.99 g, 74.8 mmol, 3 equiv) was added (vigorous bubbling occurs) and the resulting mixture was stirred for 15 min. 2-Chloro-thiazole-5-carbonitrile (4.32 g, 29.9 mmol) was added and the reaction was heated to reflux. After 2 h the reaction was cooled and was quenched by the addition of water. The THF was removed in vacuo and the resulting aqueous solution was adjusted to pH=7 by the addition of 1M HCl (aq). The resulting precipitate was filtered and washed with water to provide reasonably pure desired product. 1H NMR (CDCl3) δ10.32 (bs, 1H), 8.33 (d, 1H, J=5.3 Hz), 7.99 (s, 1H), 6.96 (s, 1H), 6.91 (d, 1H, J=5.3 Hz), 4.78 (s, 2H), 0.98 (s, 9H), 0.16 (s, 6H)

1. custom(vigorous bubbling occurs)
2. temperaturethe reaction was heated to reflux
3. temperatureAfter 2 h the reaction was cooled
4. customwas quenched by the addition of water
5. customThe THF was removed in vacuo
6. additionthe resulting aqueous solution was adjusted to pH=7 by the addition of 1M HCl (aq)
7. filtrationThe resulting precipitate was filtered
8. washwashed with water