37 results about "2-chloropyrimidine" patented technology

The invention relates to a synthetic method of an anti-tumor medicine, namely N-[2-[[2-(dimethylamino) ethyl] methyl amino]-4-methoxy-5-[[4-(1-methyl-1H-indole-3-yl)-2-pyrimidyl] amino] phenyl]-2-acrylamide (AZD9291) and a key intermediate of the anti-tumor medicine. The synthetic method comprises the following steps: performing Boc acid anhydride protection on 4-fluoro-2-methoxy-5-nitroaniline to obtain 4-fluoro-2-methoxy-5-nitroanilino tert-butyl formate, then reacting with N,N,N'-trimethylethylenediamine to obtain 4-(N,N,N'-trimethylethylenediamino)-2-methoxy-5-nitroanilino tert-butyl formate, then reducing to obtain 2-(N,N,N'-trimethylethylenediamino)-4-methoxy-5-tert-butyl carbamate phenylamine, then completely reacting with acryloyl chloride and directly removing a Boc protecting group to obtain 2-methoxy-4-N,N,N'-trimethylethylenediamino-5-acrylamido phenylamine, and finally reacting with 3-(2-chloropyrimidine-4-yl)-1-methylindole to obtain AZD9291. A process disclosed by the invention is simple in step, relatively high in yield, mild in reaction condition and easy for realization of industrial production.

The invention relates to a preparation method of piribedil. The method is characterized in that piperidine is used as a starting raw material, and piperonyl chlorine is prepared through a Blanc reaction; in addition, 2-cloro pyridine is used as a starting raw material to carry out single alkylation on piperazine to obtain 1-(2-pyrimidyl)piperazine; and the prepared piperonyl chlorine and the 1-(2-pyrimidyl)piperazine are subjected to an N-alkylation reaction to obtain the piribedil. The invention has the advantages that the raw material piperidine has low price and is easy to obtain; the reaction condition is moderate, and reactions of all steps can be quickly carried out at lower temperature without high temperature, high pressure or special catalysts; the yield of products is higher; a purification method is simple; the purity is better (the purity content of HPLC is not lower than 99.8 percent), and the like, thus the method is a route which has simple operation, higher yield, lower cost and stable quality and is suitable for industrial production.

The invention provides a novel preparation method for a selective kinases inhibitor Palbociclib for cyclin-dependent kinases CDK4 and CDK6, and belongs to the technical field of medicament preparation. The preparation method comprises taking 4-amino-5-bromo-2-chloropyrimidine as an initial raw material, performing acetylation with N-methoxy-N-methylacetamide to obtain an intermediate 2, performing Friedlaender reaction on the intermediate and a raw material ethyl acetoacetate to obtain an intermediate 3, and performing amino substitution on the intermediate 3 and a halogenated cyclopentane to obtain an intermediate 4; performing substitution reaction on a raw material 5-bromo-2-nitropyridine and a raw material tert-butyl 1-piperazinecarboxylate to obtain an intermediate 5, and reducing the intermediate 5 to obtain an intermediate 6; performing substitution reaction on the intermediate 4 and the intermediate 6, and performing deprotection to obtain the target product 6-acetyl-8-cyclopentyl-5-methyl-2-[[5-(piperazin-1-yl)pyridin-2-yl]amino]-8H-pyrido[2,3-d]pyrimidin-7-one with the yield of 45% or more. A brand-new route is employed, the reaction raw materials are cheap and easy to obtain, reaction conditions are mild, noble metal catalysts are avoided, and the preparation method is suitable for industrialized production.

The invention discloses a new method for preparing piribedil in a high-purity high-yield manner. The method is characterized by comprising the following steps of: utilizing piperidine as a raw material, and preparing the piribedil through four-step reaction, namely a blanc chloromethylation, an N-single protection piperazine ammoniation, deprotection and 2-cloro pyridine condensation. Compared with the traditional method, the method provided by the invention has the advantages that the N-single protection piperazine replaces piperazine, the piperazine dosage is reduced, a side reaction is alleviated, the impurities of a reaction process are reduced, the operation is simple, the condition is mild and is easy to control, the aftertreatment is convenient, according to the method, the environmental protection is realized, the total recovery is high, and the method is novel and used for industrially compounding piribedil.

The invention relates to a method for preparing 2-chloropyrimidine-4 formic acid. The method comprises the following steps: performing debydrochlorination reaction on 2-chlorine-4-methyl pyridine hydrochloride and phosphorus oxychloride and separating, thereby acquiring 2-chlorine-4-methyl pyridine; and performing methyl oxidizing reaction on 2-chlorine-4-methyl pyridine and methyl oxidant and separating, thereby acquiring 2-chloropyrimidine-4 formic acid. According to the process route provided by the invention, the yield of the target product is high, the process route can be amplified, the raw materials can be easily acquired and have low cost, and industrial production can be carried out.

The invention discloses a method of preparing 2-chloropyrimidine. The method comprises the following steps: firstly carrying out reaction on malonic acid bis-ethylacetate and urea with sodium methoxide as a catalyst to obtain barbituric acid, then carrying out reaction on the barbituric acid and phosphorus oxychloride with N, N-dimethylaniline as a catalyst to obtain 2, 4, 6-trichloropyrimidine, and finally carrying out redox reaction on the 2, 4, 6-trichloropyrimidine and zinc powder in a solvent of methanol and water under the alkaline condition to obtain the 2-chloropyrimidine, wherein the molar ratio of the 2, 4, 6-trichloropyrimidine to the zinc powder is 1:(1-1.2). According to the method disclosed by the invention, by virtue of the 2, 4, 6-trichloropyrimidine and the zinc powder with the molar ratio to be 1:(1-1.2), only chlorine on 4 and 6 bits on a pyrimidine ring of the 2, 4, 6-trichloropyrimidine can be reduced, so that the side effect of generating dichloride or pyrimidine is reduced; and by virtue of the reaction route, the 2-chloropyrimidine with high purity and yield is obtained.

The invention discloses a method for synthesizing a 2-triisopropyl silicon substrate acetylene indoles compound. The method comprises the steps of firstly adopting the indoles compound as a raw material, and under an alkaline condition of sodium hydride, generating a 1-(pyrimidyl-2-base)-1H-indoles compound through the reaction of indole or substituted indole and 2-chloropyrimidine; introducing a pyridine guiding group into the indoles compound; then carrying out alkynylation reaction on the 1-(pyrimidyl-2-base)-1H-indoles compound under the participation of bispalladium dichloride, cesium carbonate, silver hexafluoroantimonate, aluminium oxide, triisopropyl silicon substrate acetylene bromine and a 1,4-dioxane solvent; finally synthesizing the 2-triisopropyl silicon substrate acetylene indoles compound. The method applies a direct C-H activation reaction method, so that a pre-functionalization process is eliminated, reaction steps are reduced, and the reaction economical efficiency is improved.

The invention discloses a method for synthesizing 2-chloro/hydroxypyrimidine-5-carboxylic acid, and belongs to the field of synthesis of pharmaceutical intermediates. The invention comprises the following steps: reacting 2-chloro-5-bromopyrimidine with Boc2O under action of an active metallic reagent; then, adding an aqueous acid solution or an aqueous alkali solution to reflux at room temperature; and treating to obtain 2-chloropyrimidine-5-carboxylic acid and 2-hydroxypyrimidine-5-carboxylic acid, respectively. The method avoids a problem of low yield during scale-up by a method of feeding CO2, has good batch-to-batch operation reproducibility, and provides a new way for production scale-up.

The invention relates to a preparation method of hexachloroacetone, belonging to the technical field of the preparation of organic chemical gas. The preparation method comprises the following steps: mixing a compound A with a chlorine molecule B, and reacting at 30-150 DEG C under the effect of a catalyst, wherein a reaction product is a mixture containing hexachloroacetone and the catalyst; and separating the catalyst from the mixture, so as to obtain a crude product; purifying the crude product, so as to obtain hexachloroacetone, wherein the compound A is at least one of acetone and chloroacetone with the chlorine atomic number of 1-5, the chlorine molecule B is chlorine or a mixture of chlorine and diluent gas, the diluent gas is inert gas or nitrogen, and the catalyst is pyrimidine, 2-chloropyrimidine or symtriazine. The method has the beneficial effects that the catalyst is easily recycled, and hexachloroacetone with extremely low impurity content can be obtained in a high-yield manner.

The invention discloses a synthetic C2-acetoxy-3-indolone compound and a method thereof. The method comprises the following steps: using indole compounds as raw materials; carrying out a reaction between indole or substituent indole with 2-chloropyrimidine under alkaline conditions of sodium hydride to generate 1-(pyrimidinyl-2-yl)-1H-indole compound; introducing a pyrimidine directing group into the indole compound; allowing 1-(pyrimidinyl-2-yl)-1H-indole compound to participate in an oxidation reaction in the presence of iodosobenzene diacetate as an oxidant and a mixed solvent of acetic acid and acetic anhydride; finally synthesizing the C2-acetoxy-3-indolone compound. As an indole structure is directly used in an oxidizing reaction, a pre-functionalization process is eliminated to reduce reaction steps, the reaction economic efficiency is improved, and the C2-acetoxy-3-indolone compound is synthesized effectively under a relatively mild condition. The structural unit can be used as pharmaceutical intermediate, polymer substrate, premise of total synthesis, and has a wide biological activity and a broad application prospect.

The invention discloses a method for preparing 2-chloropyrimidine. According to the method, firstly, tetraalkoxy malonaldehyde and guanidine salt have a cyclization reaction in a polar solvent at the temperature of subzero 5 DEG C-0 DEG C under the catalysis of strong acid action exchange resin serving as a catalyst, pH of a product obtained through the cyclization reaction is adjusted to 7-8, reduced pressure distillation is performed, 2-aminopyrimidine is obtained and is reduced at the temperature of subzero 10 DEG C-5 DEG C under the catalysis of NaNO2, HCl and ZnCl2 serving as catalysts, and a 2-chloropyrimidine product is obtained. By means of the synthetic route, 2-chloropyrimidine with higher purity and higher yield is obtained.

The invention discloses a synthesis process of 2-chloropyrimidine. The synthesis method of the invention is as below: reacting guanidine nitrate and 1,1,3,3-tetramethoxy propane in an absolute ethyl alcohol solvent with continuous introduction of dry hydrogen chloride gas at 20-30 DEG C for 4-6 h to obtain 2-aminopyrimidine; and then reducing 2-aminopyrimidine in the presence of catalysts of NaNO2, HCl and ZnCl2 at -10-5 DEG C to obtain the product. Through the above preparation route, 2-chloropyrimidine with high purity and high yield can be obtained.