4-hydroxybenzamide

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 25.0 g (182.3 mmol) of 4-hydroxybenzamide and 23.0 mL (182.3 mmol) of ethyl bromopyruvate was stirred and heated at 115° C. for 30 minutes. The mixture cooled to room temperature and sat under N2 atmosphere overnight. Ethyl acetate (100 mL) was added and the mixture stirred for 1 hour. The solid oxazole (36.99 g, 158.6 mmol) was collected by suction filtration in 87% yield: 1H NMR (CDCl3) δ10.21 (broad s, 1H), 8.82 (s, 1H), 7.83 (d, J=8.7 Hz, 2H), 6.90 (d, J=8.7 Hz, 2H), 4.29 (q, 2H), 1.29 (t, 3H); IR (cm-1) 3400, 3169, 1731, 1612, 1731, 1507, 1444; FDMS 233. Anal. (C12H11NO4) C, H, N. The mixture cooled to room temperature the mixture stirred for 1 hour

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of p-hydroxybenzamide (3.43 g), methyl bromoacetate (2.37 ml) and K2CO3 (3.45 g) was stirred for 12 hr in 25 ml of DMF. The reaction mixture was diluted with water (150 ml); the solid was filtered, washed with water, and air dried. Crystallization from ethanol gave 3.3 g (63%) of the title compound as white crystals. the solid was filtered washed with water, and air dried Crystallization from ethanol

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 50 g (0.365 mole) of 4-hydroxybenzamide, 114.8 g (0.729 mole) of 1-bromo-3-chloropropane and 151.3 g (1.1 mole) of anhydrous potassium carbonate in 1 liter of acetone was heated at reflux for 20 hr. The mixture was concentrated under reduced pressure and the rsidue was stirred with 1.2 liter of water to remove inorganic solids. The mixture was filtered and the filter cake was washed with water and petroleum ether and dried to yield 75.5 g (97%) of the title compound as a white solid. An analytical sample was recrystallized from ethyl acetate, m.p. 142°-143° C. was heated at reflux for 20 hr The mixture was concentrated under reduced pressure to remove inorganic solids The mixture was filtered the filter cake was washed with water and petroleum ether dried

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 50 g of 4-hydroxybenzamide, 106.1 g of 1-bromotetradecane, 75.59 g of potassium hydroxide, 5.46 g of sodium iodide and 600 ml of dimethylformamide is heated at 110° C. for 24 hours; followed by stirring at room temperature for 72 hours. The reaction is poured into water, the resulting solid collected and washed with water. The solid is recrystallized first from chloroform then ethyl acetate to give 58 g of the desired product. the resulting solid collected washed with water The solid is recrystallized first from chloroform

反応条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 50 g of 4-hydroxybenzamide, 106.1 g of 1-bromotetradecane, 75.59 g of potassium hydroxide, 5.46 g of sodium iodide and 600 ml of dimethylformamide is heated at 110° C. for 24 hours; followed by stirring at room temperature for 72 hours. The reaction is poured into water, the resulting solid collected and washed with water. The solid is recrystallized first from chloroform then ethyl acetate to give 58 g of the desired product. the resulting solid collected washed with water The solid is recrystallized first from chloroform