反应详情

温度

150 °C

A solution of 0.835 g of benzyl 4-[4-(azetidin-3-yloxy)phenyl]-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate (Example 257c) and 0.233 g of 2-chlorobenzothiazole in 16 ml of N,N-dimethylformamide is admixed with 0.345 g of potassium carbonate. The mixture is stirred at 150° C. over 1 hour, cooled to room temperature and poured onto a mixture of 100 ml of brine, 50 ml of water and 150 ml of ethyl acetate. The phases are separated and the aqueous phase is extracted with 150 ml of ethyl acetate. The combined organic phases are dried over sodium sulphate and concentrated by evaporation. The title compound is obtained as a light yellow resin from the residue by means of flash chromatography (SiO2 60F). Rf=0.35 (4:1 EtOAc-heptane); Rt=4.78.

1. temperaturecooled to room temperature
2. customThe phases are separated
3. extractionthe aqueous phase is extracted with 150 ml of ethyl acetate
4. dry with materialThe combined organic phases are dried over sodium sulphate
5. concentrationconcentrated by evaporation