4,4-二甲基-2-戊酮

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 100 mL reaction flask is charged with 4,4-dimethyl-pentan-2-one (10 g, 0.1 mol), formamidine acetate (57 g, 0.5 mol), and butanol (50 mL). The reaction mixture is heated to 130° C. and stirred for 24 hours. The crude mass is washed once with aqueous sulfuric acid (10%, 100 mL) followed by twice with brine (30 mL). Butanol is recovered by roto-evaporation. The crude product is further purified with liquid chromatography (Biotage® system) and then crystallized. Product 4-(2,2-dimethyl-propyl)-pyrimidine (˜5 g) is obtained. A 100 mL reaction flask The crude mass is washed once with aqueous sulfuric acid (10%, 100 mL) Butanol is recovered by roto-evaporation The crude product is further purified with liquid chromatography (Biotage® system) crystallized

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To an ice-cooled solution of sodium ethanolate (128.5 g, 1.79 mol) in EtOH (2500 ml) under nitrogen atmosphere is added 4,4-dimethyl-pentan-2-one (195.0 g, 1.71 mol). Half an hour later, oxalic acid diethyl ester (231.5 g, 1.71 mol) is added. After being stirred at rt for 24 h, the reaction mixture is diluted with water, and acidified to pH 2.0 by 6N aq hydrochloric acid. The mixture is contracted to about 1 L and extracted with DCM. The combined extracts are washed with brine, dried over sodium sulfate, and concentrated in vacuo to yield the product as a brown liquid. extracted with DCM The combined extracts are washed with brine dried over sodium sulfate concentrated in vacuo

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 100 mL reaction flask is charged with 4,4-dimethyl-pentan-2-one (10 g, 0.1 mol), formamidine acetate (57 g, 0.5 mol), and butanol (50 mL). The reaction mixture is heated to 130° C. and stirred for 24 hours. The crude mass is washed once with aqueous sulfuric acid (10%, 100 mL) followed by twice with brine (30 mL). Butanol is recovered by roto-evaporation. The crude product is further purified with liquid chromatography (Biotage® system) and then crystallized. Product 4-(2,2-dimethyl-propyl)-pyrimidine (˜5 g) is obtained. A 100 mL reaction flask The crude mass is washed once with aqueous sulfuric acid (10%, 100 mL) Butanol is recovered by roto-evaporation The crude product is further purified with liquid chromatography (Biotage® system) crystallized