6 results about "Acetamide" patented technology

The invention discloses a method for preparing oxiracetam (4-hydroxylethylpyrrolidone-2-acetamide) used for improving brain functions. The method comprises the following steps: taking chloroacetoacetic ester and aminoacetonitrile hydrochloride (aminoacetonitrile sulphate) as raw materials, and conducting the steps such as hydrogenation, substitution, cyclization and the like on the chloroacetoacetic ester, and finally synthesizing and obtaining the objective product; and the preparation method has the advantages that the price of the raw materials is cheap and the materials are easy to obtain, the cost is low, the technical process is simple, and compared with the prior art, the yield rate is higher, the product quality is better, thus being more suitable for the industrialized scale production.

The invention provides a cadmium sulfide quantum dot and a preparation method thereof.The preparation method comprises the steps of placing plant tubers containing starch in a container, adding water,conducting heating extraction, cooling and filtering, and obtaining a plant leaching solution containing starch; and adding thioacetamide and cadmium sulfate, stirring, putting into an electronic steam pressure sterilization pot, reacting at the temperature of 121 DEG C under the pressure of 102kPa, and cooling to obtain the cadmium sulfide quantum dots. According to the method, the cadmium sulfide quantum dots are prepared in situ in one step in a short reaction time under the conditions of low temperature and low pressure by taking the plant leaching solution containing starch as a stabilizer and a modifier.

The invention discloses a preparation process of N-(2-acetamido)-2-iminodiacetic acid. The preparation process comprises the following steps: subjecting a reactant 1 with a structure as shown in a formula as described in the specification to reacting with a nitrogen-containing compound, and subjecting the obtained intermediate product to reacting with an amination reagent to obtain N-(2-acetamido)-2-iminodiacetic acid. In the formula, Y, Y1, Y2 and Y3 are respectively one selected from the group consisting of OH, OM, halogen, OR and SR; and Z is one selected from the group consisting of halogen, OH and SH. According to the invention, low-price starting raw materials are used, so cost can be greatly reduced; reaction conditions are mild, a subsequent purification process is simple, and theyield of N-(2-acetamido)-2-iminodiacetic acid is high; and the whole process disclosed by the invention is relatively simple to operate and easy to control, is beneficial for scale-up production, shortens the reaction production period, and is also beneficial to academic research and the like of N-(2-acetamido)-2-iminodiacetic acid.

The invention belongs to the technical field of pharmaceutical and chemical intermediates and related chemistry, and provides a preparation method of an N-1, 5-diaryl-4-pentene-1-acetamide compound. The preparation method comprises the following steps: taking a cinnamyl alcohol derivative as a raw material, under the action of copper salt, silver salt and an acid as shown in specification as co-catalysts and ligands, reacting with a styrene compound and a nitrile compound under the solvent-free condition of 80-120 DEG C; or reacting with the styrene compound directly in a nitrile solvent at the temperature of 80-120 DEG C, and reacting for 16 hours to obtain the N-1, 5-diaryl-4-pentene-1-acetamide compound. The preparation method is simple and convenient to operate, the starting materialsare cheap and easy to obtain, no by-product is generated, the possibility of industrialization is realized, and the N-1, 5-diaryl-4-pentene-1-acetamide compound is obtained in high yield; and the synthesized product can be further functionalized to obtain various compounds, and is applied to the development and research of natural products, functional materials and fine chemicals.