2-氯丙酸丁酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 6.1 g of 4-hydroxybenzaldehyde, 9 g of n-butyl α-chloropropionate, 4 g of sodium carbonate, 0.2 g of potassium iodide and 20 g of dimethyl formamide, were mixed, and the mixture was stirred at 100° C. for 5 hours and then cooled to room temperature. The inorganic salts were filtered off and washed with dimethylformamide. The solution from the washing was combined with the filtrate, followed by concentration and distillation under reduced pressure, whereby 11.3 g of butyl 2-(4-formylphenoxy)propionate was obtained as a colorless transparent liquid. The boiling point was from 135 to 140° C./0.1 mmHg. cooled to room temperature The inorganic salts were filtered off washed with dimethylformamide followed by concentration and distillation under reduced pressure

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: 121 g (1.1 moles) of hydroquinone were dissolved in 500 ml of dimethylsulfoxide, 37 g (0.5 mole) of calcium hydroxide were added to the solution, and the mixture was stirred for 1 hour at 45°-50° C. Thereafter, 82.3 g (0.455 mole) of optically active n-butyl 2-chloropropionate (αD20 =-13.0°) were added dropwise in the course of 1 hour at the same temperature. The mixture was stirred for a further 3 hours at 45°-50° C., cooled, and worked up as described in Example 1. 49.7 g (0.21 mole) of optically active n-butyl 2-(4-hydroxyphenoxy)-propionate were obtained. Yield: 46.2%; bp. =150°-152° C./0.22 mbar; αD20 =+11.8° ##STR7## The mixture was stirred for a further 3 hours at 45°-50° C. cooled

反应条件: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 6.1 g of 4-hydroxybenzaldehyde, 9 g of n-butyl α-chloropropionate, 4 g of sodium carbonate, 0.2 g of potassium iodide and 20 g of dimethyl formamide, were mixed, and the mixture was stirred at 100° C. for 5 hours and then cooled to room temperature. The inorganic salts were filtered off and washed with dimethylformamide. The solution from the washing was combined with the filtrate, followed by concentration and distillation under reduced pressure, whereby 11.3 g of butyl 2-(4-formylphenoxy)propionate was obtained as a colorless transparent liquid. The boiling point was from 135 to 140° C./0.1 mmHg. cooled to room temperature The inorganic salts were filtered off washed with dimethylformamide followed by concentration and distillation under reduced pressure