Tetrahydrofuran → {5-[1-Hydroxy-2-(2-methoxy-phenyl)-ethyl]-thiazol-2-yl}-carbamic acid tert-butyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of n-butyl lithium (2.5 M, 250 mL, 0.62 mol) was added to a solution of N-Boc-2-aminothiazole (56 g, 0.28 mol) in anhydrous tetrahydrofuran (500 mL) was added at −78° C. After the addition was completed, the mixture was allowed to stir at −78° C. for one hour. A solution of (2-methoxy-phenyl)-acetaldehyde (36 g, 0.24 mol) in tetrahydrofuran (100 mL) was slowly added to the reaction mixture while maintaining a temperature of −78° C. The mixture was allowed to warm to room temperature and stirred for 15 hours. The reaction was quenched with a saturated aqueous solution of ammonium chloride (1000 mL) and extracted three times with ethyl acetate (400 mL). The combined organic layers were washed with a saturated aqueous solution of sodium chloride, dried over sodium sulfate, and evaporated to dryness. The crude product was purified by column chromatography to give the pure product (28 g, 0.080 mol, 28%).

Herkunft & Nachweise