反应详情

A solution of (2-isopropylthiazol-4-yl)(1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone trifluoroacetate (example 22, step b) (0.325 g) in NMP (3 mL) was treated with acetic acid (0.067 mL) and stirred for 5 minutes. A solution of 2-chloro-3-(2-hydroxyethyl)benzaldehyde (example 80, step d) (0.217 g) in NMP (4 mL) was then added, the resulting solution was stirred for 1 hour and then treated with sodium triacetoxyborohydride (1.025 g). The mixture was stirred overnight at room temperature, then poured into saturated sodium bicarbonate and extracted twice with ethyl acetate. The combined extracts were washed three times with water, once with brine, then dried over anhydrous magnesium sulphate and purified by flash chromatography on silica eluted with 1:2:97 triethylamine:methanol:dichloromethane to afford the subtitled compound as a colourless gum. Yield 0.411 g.

1. stirringthe resulting solution was stirred for 1 hour
2. stirringThe mixture was stirred overnight at room temperature
3. extractionextracted twice with ethyl acetate
4. washThe combined extracts were washed three times with water
5. dry with materialonce with brine, then dried over anhydrous magnesium sulphate
6. custompurified by flash chromatography on silica
7. washeluted with 1:2:97 triethylamine