反应详情

温度

80 °C

Sodium hydride (254 mg, 60% suspension in mineral oil, 6.35 mmol) was added to a solution of (1S,2R,4S,7S)-7-{[9-(tert-butyldimethylsilanyloxy)nonyl]methylamino}-bicyclo[2.2.1]heptan-2-ol (1.01 g, 2.54 mmol) in dry toluene (20 mL) at 0° C. under a nitrogen atmosphere. As soon as the gas evolution subsided hydroxy-di-thiophen-2-yl-acetic acid ethyl ester (817 mg, 3.04 mmol) was added in portions, and when the gas evolution stopped the reaction mixture was heated at 80° C. on a preheated sand bath. After 2.5 h the reaction mixture was poured onto satd ammonium chloride (aq) and ether. The layers were separated, the aqueous layer extracted with ether, and the combined organic layers were washed with brine, dried (Na2SO4), filtered, and concentrated to dryness to afford a light brown viscous oil. The crude product was purified by column chromatography over silica gel using a gradient of 1-40% ethyl acetate in DCM as eluent to afford the product as a very light brown viscous oil.

1. additionwas added in portions, and when the gas evolution
2. customThe layers were separated
3. extractionthe aqueous layer extracted with ether
4. washthe combined organic layers were washed with brine
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated to dryness
8. customto afford a light brown viscous oil
9. customThe crude product was purified by column chromatography over silica gel using a gradient of 1-40% ethyl acetate in DCM as eluent
10. customto afford the product as a very light brown viscous oil