- Structure-Based Discovery of Pyrimidine Aminobenzene Derivatives as Potent Oral Reversal Agents against P-gp- And BCRP-Mediated Multidrug Resistance
-
Overexpression of ATP binding cassette (ABC) transporters, including P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP), is an important factor leading to multidrug resistance (MDR) in cancer treatments. Three subclasses of dual inhibitors of P-gp and BCRP were designed based on the active moieties of BCRP inhibitors, tyrosine kinase inhibitors, and P-gp inhibitors, of which compound 21 possessed low cytotoxicity, high reversal potency, and good lipid distribution coefficient. 21 also increased the accumulation of Adriamycin (ADM) and Mitoxantrone (MX), blocked Rh123 efflux, and made no change in the protein expression of P-gp and BCRP. Importantly, coadministration of 21 can significantly improve the oral bioavailability of paclitaxel (PTX). It was also demonstrated that 21 significantly inhibited the growth of K562/A02 xenograft tumors by increasing the sensitivity of ADM in vivo. In summary, 21 has the potential to overcome MDR caused by P-gp and BCRP and to improve the oral bioavailability of PTX.
- Qiu, Qianqian,Zou, Feng,Li, Huilan,Shi, Wei,Zhou, Daoguang,Zhang, Ping,Li, Teng,Yin, Ziyu,Cai, Zilong,Jiang, Yuxuan,Huang, Wenlong,Qian, Hai
-
p. 6179 - 6197
(2021/06/01)
-
- Method for preparing N-(5-carboxyl-2-methylphenyl)-4-(3-pyridine)-2-pyrilamine
-
The invention discloses a method for preparing N-(5-carboxyl-2-methylphenyl)-4-(3-pyridine)-2-pyrilamine. The method specifically comprises the following steps: step 1, carrying out ethyl esterification reaction on 3-nitro-4-methyl benzoic acid serving as an initial raw material to generate a compound 2; step 2, reducing nitro of the compound 2 through hydrogenation reduction reaction in the presence of palladium on carbon to generate a compound 3; step 3, reacting the compound 3 with a nitrile amine aqueous solution, and then carrying out base exchange to obtain a compound 4; step 4, carrying out cyclization between the compound 4 and a compound 6 to obtain a compound 7; and step 5, hydrolyzing the compound 7 under the action of an alkaline to generate a compound 8, namely N-(5-carboxyl-2-methylphenyl)-4-(3-pyridine)-2-pyrilamine. The method overcomes the defects that in the prior art such as long reaction time, low yield, high cost, difficulty for industrial production, and the like. A preparation method, which is high in yield, is environmentally-friendly, and is suitable for industrial production, is provided.
- -
-
-
- SYNTHESIS OF 6-METHYL-N1-(4-(PYRIDIN-3-YL)PYRIMIDIN-2-YL)BENZENE-1,3-DIAMINE
-
Processes and useful intermediates for the synthesis of the tyrosine kinase inhibitors Formula (II) nilotinib and Formula (IV) imatinib. Key intermediates, method for their synthesis and their use in a divergent synthesis, making use of a Curtius rearrangement, to nilotinib and imatinib are described.
- -
-
-
- MANUFACTURING METHOD OF BENZOIC ACID COMPOUND
-
PROBLEM TO BE SOLVED: To provide a simple and high yield manufacturing method of 3-[(aminoiminomethyl)amino]-4-methylbenzoic acid (C1 to C4 alkyl)ester sulfate and ester thereof. SOLUTION: There is provided a method for manufacturing 3-[(aminoiminomethyl)amino]-4-methylbenzoic acid (C1 to C4 alkyl)ester sulfate (sulfate of the formula 2) from 3-amino-4-methylbenzoic acid (C1 to C4 alkyl)ester and cyanamide. In the formula R1 represents a C1 to C4 alkyl group. Further there is provided a simple and high yield 4-methyl-3-{[4-(pyridine-3-yl)pyrimidine-2-yl]amino}-benzoic acid which is a manufacturing intermediate of nilotinib using the compound. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
- -
-
-
- Molecular requirements for the expression of antiplatelet effects by synthetic structural optimized analogues of the anticancer drugs imatinib and nilotinib
-
Background: Platelets play important roles in cancer progression and metastasis, as well as in cancer-associated thrombosis (CAT). Tyrosine kinases are implicated in several intracellular signaling pathways involved in tumor biology, thus tyrosine kinase inhibitors (TKIs) represent an important class of anticancer drugs, based on the concept of targeted therapy. Purpose: The objective of this study is the design and synthesis of analogues of the TKIs imatinib and nilotinib in order to develop tyrosine kinase inhibitors, by investigating their molecular requirements, which would express antiplatelet properties. Methods: Based on a recently described by us improved approach in the preparation of imatinib and/or nilotinib analogues, we designed and synthesized in five-step reaction sequences, 8 analogues of imatinib (I–IV), nilotinib (V, VI) and imatinib/nilotinib (VII, VIII). Their inhibitory effects on platelet aggregation and P-selectin membrane expression induced by arachidonic acid (AA), adenosine diphosphate (ADP) and thrombin receptor activating peptide-6 (TRAP-6), in vitro, were studied. Molecular docking studies and calculations were also performed. Results: The novel analogues V–VIII were well established with the aid of spectroscopic methods. Imatinib and nilotinib inhibited AA-induced platelet aggregation, exhibiting IC50 values of 13.30 μΜ and 3.91 μΜ, respectively. Analogues I and II exhibited an improved inhibitory activity compared with imatinib. Among the nilotinib analogues, V exhibited a 9-fold higher activity than nilotinib. All compounds were less efficient in inhibiting platelet aggregation towards ADP and TRAP-6. Similar results were obtained for the membrane expression of P-selectin. Molecular docking studies showed that the improved antiplatelet activity of nilotinib analogue V is primarily attributed to the number and the strength of hydrogen bonds. Conclusion: Our results show that there is considerable potential to develop synthetic analogues of imatinib and nilotinib, as TKIs with antiplatelet properties and therefore being suitable to target cancer progression and metastasis, as well as CAT by inhibiting platelet activation.
- Alivertis, Dimitrios,Brentas, Alexios,Ntemou, Nikoleta,Pantazi, Despoina,Skobridis, Konstantinos,Tselepis, Alexandros D.
-
p. 4225 - 4238
(2019/12/25)
-
- Smo inhibitor as well as synthesis method and application thereof
-
The invention discloses an Smo inhibitor as well as a synthesis method and application thereof. A structural formula of the Smo inhibitor is shown by a formula (I) as shown in the specification. The invention also discloses the synthesis method and the application of the Smo inhibitor. According to the invention, nilotinib is optimized into the dual-targeted inhibitor being active against Smo andBcr-Abl, and the inhibitor can overcome the tolerance problem caused by single-targeted drugs, has the advantages of improving anti-tumor efficacy and reducing toxic or side effects, and provides a reference for future research on dual-targeted anti-hematologic malignant drugs.
- -
-
-
- An optimized approach in the synthesis of imatinib intermediates and analogues
-
We revisited the classical synthetic procedure for imatinib synthesis providing an improved and optimized approach in the preparation of a series of new imatinib analogues. The proposed methodology effectively overcomes certain problematic steps, saves time and labor, provides a very high yield and purity and has the potential to be used for the synthesis of many analogues. The formation of the desired guanidine salt 4, one of the key steps to the imatinib synthesis, was proceeded almost quantitatively by the reaction of the hydrochloride of the suitable aniline 3 with excess of molten cyanamide, without any solvent. Pure arylamine intermediates 6a-d were obtained quantitatively in a short reaction time after reduction of the nitro group of the intermediate pyrimidines 5a-d with hydrogen over the Adam's catalyst. In addition, the application of this optimized approach can be extended in the synthesis of nilotinib and its analogues intermediates.
- Kinigopoulou,Filippidou,Gogou,Giannousi,Fouka,Ntemou,Alivertis,Georgis,Brentas,Polychronidou,Voulgari,Theodorou,Skobridis
-
p. 61458 - 61467
(2016/07/12)
-
- AN IMPROVED PROCESS FOR THE PREPARATION OF NILOTINIB AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF
-
The present invention relates to an improved process for the preparation of nilotinib and pharmaceutically acceptable salts thereof, with high purity and yields.
- -
-
-
- Design, synthesis and biological evaluation of pyridin-3-yl pyrimidines as potent Bcr-Abl inhibitors
-
A series of pyridin-3-yl pyrimidines was synthesized and evaluated for their Bcr-Abl inhibitory and anticancer activity. The preliminary results indicated that some compounds were promising anticancer agents. Compounds A2, A8, and A9 exhibited potent Bcr-Abl inhibitory activity, suggesting that aniline containing halogen substituents might be important for biological activity. Molecular docking was carried out to investigate the binding mode of them with Bcr-Abl. Details of synthesis and SAR studies of these compounds are described. A series of phenylaminopyrimidines was designed and synthesized as potent Bcr-Abl inhibitors. The screening of these rationally designed compounds for antitumor activity had identified three candidate leads which could be further optimized to improve the anticancer activities.
- Pan, Xiaoyan,Dong, Jinyun,Gao, Hongping,Wang, Fang,Zhang, Yanmin,Wang, Sicen,Zhang, Jie
-
p. 592 - 599
(2014/05/06)
-
- NOVEL HYDRAZIDE CONTAINING TYROSINE KINASE INHIBITORS
-
The present invention relates to compounds of formula (I), and salts thereof, wherein P represents a 5 or 6-membered heteroaryl ring; R1 is aryl or unsaturated heterocyclyl radical optionally substituted by one or more identical or different radicals R5.
- -
-
Page/Page column 31
(2009/10/22)
-
- Rapid synthesis of Abelson tyrosine kinase inhibitors using click chemistry
-
Protein kinases catalyze the phosphorylation of serine, threonine, tyrosine and histidine residues in proteins. Aberrant regulation of kinase activity has been implicated in many diseases including cancer. Thus development of new strategies for kinase inhibitor design remains an active area of research with direct relevance to drug development. Abelson (Abl) tyrosine kinase is one of the Src-family of tyrosine kinases and is directly implicated in Chronic Myelogenous Leukemia (CML). In this article, we have, for the first time, developed an efficient method for the construction of small molecule-based bisubstrate inhibitors of Abl kinase using click chemistry. Subsequent biochemical screenings revealed a set of moderately potent inhibitors, a few of which have comparable potency to Imatinib (an FDA-approved drug for treatment of chronic myeloid leukemia) against Abl.
- Kalesh, Karunakaran A.,Liu, Kai,Yao, Shao Q.
-
experimental part
p. 5129 - 5136
(2010/04/04)
-
- COMPOUNDS AND COMPOSITIONS AS C-KIT AND PDGFR KINASE INHIBITORS
-
The invention provides a novel class of compounds, pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with abnormal or deregulated kinase activity, particularly diseases or disorders that involve abnormal activation of c-kit, PDGFR alpha and PDGFR beta kinases
- -
-
-
- PYRIMIDINE DERIVATIVES AND COMPOSITIONS AS C-KIT AND PDGFR KINASE INHIBITORS
-
The invention provides a novel class of pyrimidine derivatives, pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with abnormal or deregulated kinase activity, particularly diseases or disorders that involve abnormal activation of c-kit, PDGFRα and PDGFRβ kinases.
- -
-
-
- HETEROCYCLIC COMPOUNDS AND USES THEREOF
-
The present invention provides compounds, pharmaceutically acceptable compositions thereof, and methods of using the same.
- -
-
Page/Page column 59-60
(2009/01/20)
-
- COMPOUNDS AND COMPOSITIONS AS PROTEIN KINASE INHIBITORS
-
The invention provides a novel class of compounds, pharmaceutical compositions comprising such compounds and methods of using such compounds to beat or prevent diseases or disorders associated with abnormal or deregulated kinase activity, particularly diseases or disorders that involve abnormal activation of c-kit, PDGFRα and PDGFRβ kinases. Formula (I).
- -
-
Page/Page column 31
(2008/12/05)
-
- INHIBITORS OF TYROSINE KINASES
-
The invention relates to compounds of formula (I) Wherein the substituents R1, R2 and R4 have the meaning as set forth and explained in the description of the invention, to processes for the preparation of these compounds, pharmaceutical compositions containing same, the use thereof optionally in combination with one or more other pharmaceutically active compounds for the therapy of a disease which responds to an inhibition of protein kinase activity, especially a neoplastic disease, in particular leukaemia, and a method for the treatment of such disease.
- -
-
-
