698387-09-6Relevant articles and documents
Neratinib intermediate crystal as well as preparation method and application thereof
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, (2021/04/21)
The invention relates to a neratinib intermediate crystal as well as a preparation method and application thereof. The invention especially relates to a crystal form II of an intermediate A compound 6-amino-4-(3-chloro-4-(pyridine-2-substituted methoxy) aniline)-7-ethoxyquinoline carbonitrile. The crystal form II comprises diffraction peaks with diffraction angles 2 theta of 6.3 degrees, 7.8 degrees, 14.0 degrees, 15.1 degrees, 17.1 degrees, 18.8 degrees, 21.5 degrees, 22.2 degrees, 23.4 degrees and 27.5 degrees in an XRPD spectrum. When the intermediate crystal form II is used for preparing the neratinib, the dosage of a solvent can be remarkably reduced, the reaction time is shortened, the yield is increased, and meanwhile, the residual quantity of the intermediate A in a final product is remarkably reduced.
Preparation method of neratinib
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Page/Page column 10-11, (2019/11/04)
The invention relates to a preparation method of neratinib. The preparation method specifically comprises the steps: (1) in an organic solvent 1, trans-4-dimethylaminocrotonic acid hydrochloride and achloride agent react, and thus a solution containing (e)-4-(dimethylamino)but-2-enoyl chloride (hydrochloride) is obtained; (2) a solution of an organic solvent 2 containing 6-amino-4-[[3-chloro-4-[(pyridine-2-yl)methoxy]phenyl]amino]-3-cyano-7-ethoxyquinoline is added into the solution obtained in the step (1) to react, and then neratinib hydrochloride is obtained; and (3) the neratinib hydrochloride obtained in the step (2) is mixed with water and an organic solvent 3, a reaction is carried out after the pH value is regulated to be 7-10, and then the neratinib is obtained. The synthesis method has the advantages that the yield is high, the product purity is high, the production cost is low, operation is safe, easy and convenient, and large-scale industrial production is easy.
SOLID STATE FORMS OF NERATINIB AND SALTS THEREOF
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Paragraph 0076, (2018/02/28)
Solid state forms of Neratinib and salts thereof, processes for preparation thereof and pharmaceutical compositions thereof are disclosed.
Crystal forms and preparation method of neratinib free alkali
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Paragraph 0148; 0149, (2018/09/08)
The invention relates to crystal forms and a preparation method of neratinib free alkali. Specifically, the invention discloses new crystal forms of a compound shown in a formula (I) or a solvate thereof, namely a crystal form III, a crystal form IV, a crystal form V and a crystal form VI respectively. The new crystal forms disclosed by the invention are beneficial to separation and purification of a compound free alkali shown in the formula (I), and process efficiency and chemical quality of a product are greatly improved. (The formula (I) is as shown in the description.).
A to that of the preparation method of the Buddhist
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Paragraph 0033-0057, (2017/10/06)
The invention relates to the field of pharmaceuticals, in particular to a preparation method of neratinib. The preparation method specifically includes: successively condensing 6-[(E)-4-(dimethylamino)-2-butenamido]-7-ethoxy-4-chloro-3-cyanoquinoline (I) with 2-chloro-4-aminophenol (II) and 2-(chloromethyl)pyridine hydrochloride (III) through an intermediate (E)-N-{4-[3-chloro-4-hydroxyanilino]3-cyano-7-ethoxy-6-quinoline}-4-dimethylamino-2-butenamide (IV). The materials in the preparation method are easy to obtain, and the preparation method is simple, green and economical and has greatly worthy of application.
Preparation method of antineoplastic drug maleic acid neratinib
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Paragraph 0052; 0053, (2016/10/08)
The invention provides a preparation method of antineoplastic drug maleic acid neratinib. The defects in the prior art are overcome. The preparation method comprises the steps that the formula II and the formula III are coupled to form the formula IV under the effect of a catalyst; a nitro-compound IV is reduced under the effect of a reduction system to form a formula V; an amino compound V and a formula VI are condensed to obtain neratinib VII, and then the neratinib VII and maleic acid form a salt to obtain the maleic acid neratinib I. By the adoption of the technical route, the preparation method has the advantages that the synthetic route is short, reaction conditions are mild, the yield is high, raw materials are wide in source, and environmental protection is achieved.
Method for purifying neratinib
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Paragraph 0032; 0034-0035, (2017/04/14)
The invention relates to a method for purifying neratinib. The method provided by the invention is capable of effectively reducing the content of impurities in neratinib and preparing high-purity neratinib, and moreover is simple in operation, high in yield and very applicable to industrial production.
Method for preparing Neratinib
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Paragraph 0031; 0033, (2017/04/03)
The invention relates to a preparation method for neratinib. Specifically, N-[4-[[3-chloro-4-(2-pyridylmethoxy)phenyl]amino]-3-cyano-7-ethoxy-6-quinolyl]-2-diethyl phosphate-acetamide reacts with 2,2-diethoxy-N,N-dimethylethylamine or 2-(dimethylamino)acetaldehyde in the presence of a lithium salt and an alkali to produce neratinib. The method provided by the invention has the advantages of high yield, mild reaction conditions, usage of common and commercially available reagents, a low price, suitability for industrial production and good economic prospects.
The Wittig-Horner reaction for the synthesis of neratinib
Gu, Ning,Yang, Jiabin,Wang, Peng,Li, Lushen,Chen, Yang,Ji, Min
, p. 3105 - 3110 (2013/09/23)
The Wittig-Horner reaction is a classic method to get alkenes by reaction phosphonates with carbonyl compounds. In this study, it was used for the synthesis of the anticancer drug neratinib. In this method, ethyl diethoxyphosphinylacetate and dimethylaminoacetaldehyde diethylacetal, replacing (E)-4-(dimethylamino)but-2-enoyl acid hydrochloride and oxalyl chloride, were used to synthesize the 6-position side chain of neratinib.
IMPROVED PROCESS FOR PREPARATION OF COUPLED PRODUCTS FROM 4-AMINO-3-CYANOQUINOLINES USING STABILIZED INTERMEDIATES
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Page/Page column 9-10, (2010/05/13)
This invention discloses improved methods for coupling a 4-(amino)-2-butenoyl group to an amino group at the 6- or 7-position of a 4-amino-3-quinolinecarbonitrile by generating a stabilized 4-(amino)-2-butenoyl chloride hydrochloride.