CN112759583B - Quinoline derivative containing furyl and preparation method and application thereof - Google Patents

Abstract

The invention belongs to the field of anti-cancer drugs, and particularly relates to a quinoline derivative containing furyl and a preparation method and application thereof. The present invention provides compounds of formula I, stereoisomers or pharmaceutically acceptable salts thereof:

Description

Quinoline derivative containing furyl and preparation method and application thereof

Technical Field

The invention belongs to the field of anti-cancer drugs, and particularly relates to a quinoline derivative containing furyl and a preparation method and application thereof.

Background

Cancer is the second leading death killer worldwide after cardiovascular disease, chemotherapy is one of the main therapeutic approaches to inhibit tumor growth and metastasis, however, many patients encounter interference from various side effects during chemotherapy or acquire drug resistance after a period of treatment, and the disease recurs again. Therefore, the development of new antitumor agents remains elusive.

Protein tyrosine kinases are capable of catalyzing the phosphorylation of specific tyrosyl residues in a variety of proteins involved in the regulation of cell growth and differentiation. Protein tyrosine kinases can be broadly classified as receptor (e.g., EGFR, HER2 (C-ERB-2), C-MET, TIE-2, PDGFR, FGFR) or non-receptor (e.g., C-SRC, LCK, ZAP 70) kinases. Inappropriate or uncontrolled activation of many of these kinases (e.g., aberrant protein tyrosine kinase activity resulting from overexpression or mutation) has been shown to result in uncontrolled cell growth. Abnormal activity of protein tyrosine kinases such as HER2, C-SRC, C-MET, EGFR, PDGFR and the like is associated with human malignancies. For example, increased EGFR activity is associated with non-small cell lung cancer, bladder cancer, and head and neck cancer, and increased HER2 activity is associated with cancers of the breast, ovary, stomach, and pancreas. Thus, inhibition of protein tyrosine kinases should provide a treatment for the above-mentioned tumors.

At present, the defects of nonselectivity, acute toxicity or high cell drug resistance of the antitumor drugs generally exist. Research shows that the multi-target anticancer drug is expected to improve the treatment effect of single-target anticancer drugs and reduce drug resistance, so that the multi-target anticancer drug is an important research direction for research and development of anticancer drugs. Therefore, there is a need to develop new anti-cancer drugs with multiple targets to enrich the choice of treatment options and/or to improve the problems of existing anti-cancer drugs.

Disclosure of Invention

To ameliorate the above problems of the prior art, the present invention provides a compound represented by the following formula I:

wherein R is ₁ Selected from CN, halogen, OH, SH, unsubstituted or substituted by one or more R _a Substituted of the following groups: c _1-40 Alkyl radical, C _1-40 Alkyloxy, NH ₂ 、-Y-C(O)R ₆ 、-C(O)-Y-R ₆ 、-Y-S(O) ₂ R ₇ 、-S(O) ₂ -Y-R ₇ ；

Each Y is the same or different and is independently selected from a bond or-O-;

R ₂ 、R ₃ identical or different, independently of one another, from H, unsubstituted or substituted by one or more R _b Substituted of the following groups: c _1-40 Alkyl radical, C _3-40 Cycloalkyl radical, C _6-20 Aryl, 5-20 membered heteroaryl, 3-20 membered heterocyclyl;

R ₄ selected from unsubstituted or substituted by one or more R _c Substituted of the following groups: a 5-20 membered heteroaryl or 3-20 membered heterocyclyl, provided that at least 1 ring atom of the heteroaryl or heterocyclyl is O;

R ₅ selected from unsubstituted or substituted by one or more R _d Substituted C _1-40 An alkyl group;

each R _a 、R _b 、R _c 、R _d Identical or different, independently of one another, from halogen, CN, OH, SH, oxo (= O), NO ₂ Unsubstituted or substituted by one or more R _e Substituted of the following groups: c _1-40 Alkyl radical, C _2-40 Alkenyl radical, C _3-40 Cycloalkyl, C _3-40 Cycloalkenyl radical, C _6-20 Aryl, 5-20 membered heteroaryl, 3-20 membered heterocyclyl, C _1-40 Alkyloxy, C _2-40 Alkenyloxy radical, C _3-40 Cycloalkyl oxy, C _3-40 Cycloalkenyloxy, C _6-20 Aryloxy, 5-20 membered heteroaryloxy, 3-20 membered heterocyclyloxy, NH ₂ 、-Y-C(O)R ₆ 、-C(O)-Y-R ₆ 、-Y-S(O) ₂ R ₇ 、-S(O) ₂ -Y-R ₇ ；

Each R _e Identical or different, independently of one another, from halogen, CN, OH, SH, oxo (= O), NO ₂ Unsubstituted or substituted by one or more R _f Substituted of the following groups: c _1-40 Alkyl radical, C _2-40 Alkenyl radical, C _3-40 Cycloalkyl radical, C _3-40 Cycloalkenyl radical, C _6-20 Aryl, 5-20 membered heteroaryl, 3-20 membered heterocyclyl, C _1-40 Alkyloxy, C _2-40 Alkenyloxy radical, C _3-40 Cycloalkyl oxy, C _3-40 Cycloalkenyloxy, C _6-20 Aryloxy, 5-20 membered heteroaryloxy, 3-20 membered heterocyclyloxy, NH ₂ 、-Y-C(O)R ₆ 、-C(O)-Y-R ₆ 、-Y-S(O) ₂ R ₇ 、-S(O) ₂ -Y-R ₇ ；

Each R _f Identical or different, independently of one another, from halogen, CN, OH, SH, oxo (= O), NO ₂ 、C _1-40 Alkyl radical, C _2-40 Alkenyl radical, C _3-40 Cycloalkyl radical, C _3-40 Cycloalkenyl radical, C _6-20 Aryl, 5-20 membered heteroaryl, 3-20 membered heterocyclyl, C _1-40 Alkyloxy, C _2-40 Alkenyloxy radical, C _3-40 Cycloalkyloxy radical, C _3-40 Cycloalkenyloxy, C _6-20 Aryloxy, 5-20 membered heteroaryloxy, 3-20 membered heterocyclyloxy, NH ₂ 、-Y-C(O)R ₆ 、-C(O)-Y-R ₆ 、-Y-S(O) ₂ R ₇ 、-S(O) ₂ -Y-R ₇ ；

Each R ₆ 、R ₇ Identical or different, independently of one another, from H, C _1-40 Alkyl radical, C _3-40 Cycloalkyl radical, C _6-20 Aryl, 5-20 membered heteroaryl, 3-20 membered heterocyclyl.

According to an embodiment of the invention, in formula I

Represents R ₄ The other groups on the double bond to which they are bonded may be in either the cis (Z) or trans (E) configuration.

For example, the compound of formula I may have a structure as shown in formula I':

wherein R is ₁ 、R ₂ 、R ₃ 、R ₄ 、R ₅ Having the definitions described above.

According to the bookEmbodiments of the invention, R ₁ Selected from CN, halogen, OH, SH, C _1-6 Alkyl, NH ₂ 、COOH、-OC(O)C _1-6 Alkyl, -C (O) OC _1-6 An alkyl group.

According to an embodiment of the invention, R ₂ 、R ₃ Identical or different, independently of one another, from H or by one or more R _b Substituted C _6-10 And (3) an aryl group.

According to an embodiment of the present invention, R _b Selected from halogen, CN, OH, SH, NO ₂ Unsubstituted or substituted by one or more R _e Substituted of the following groups: c _1-6 Alkyl radical, C _1-6 An alkyloxy group.

According to an embodiment of the invention, R _e Selected from halogen, CN, OH, SH, NO ₂ Unsubstituted or substituted by one or more R _f Substituted C _6-10 And (3) an aryl group.

According to an embodiment of the present invention, R _f Selected from halogens.

According to an embodiment of the invention, the halogen is selected from F, cl, br or I.

According to exemplary embodiments of the invention, R ₂ Selected from 4- (benzyloxy) phenyl, 4-chlorophenyl, 4- (3-fluorobenzyloxy) -3-chlorophenyl.

According to an embodiment of the invention, R ₄ Selected from unsubstituted or substituted by one or more R ^c A substituted 5-6 membered heteroaryl or 5-6 membered heterocyclyl, provided that 1 ring-forming atom of the heteroaryl or heterocyclyl is O. As an example, R ₄ Selected from unsubstituted or substituted by one or more R ^c Substituted of the following groups: furan-2-yl, furan-3-yl.

According to an embodiment of the invention, R ₅ Is selected from C _1-6 An alkyl group.

According to an embodiment of the invention, each R is _a 、R _b 、R _c 、R _d Identical or different, independently of one another, from halogen, CN, OH, SH, oxo (= O), NO ₂ 、C _1-6 Alkyl radical, C _1-6 Alkyloxy, C _6-10 Aryloxy, 5-6 membered heteroaryloxy, 5-6 membered heterocyclyloxy。

According to a preferred embodiment of the invention, the compound of formula I has the structure shown in formula I-1 below:

according to a more preferred embodiment of the invention, the compound of formula I has the structure shown in formula I-2 below:

according to a more preferred embodiment of the invention, the compound of formula I is selected from the following compounds:

(E) -N- (4- (4- (benzyloxy) anilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide (a);

(E) -N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide (b);

(E) -N- (4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide (c).

The invention also provides a preparation method of the compound shown in the formula I, which comprises the step of reacting the compound shown in the formula II with the compound shown in the formula III to obtain the compound shown in the formula I:

wherein R is ₁ 、R ₂ 、R ₃ 、R ₄ And R ₅ Having the definitions as described above.

According to an embodiment of the present invention, the reaction of the compound of formula II with the compound of formula III may be carried out in the presence of an organic solvent, which may be selected from N-methylpyrrolidone.

According to an embodiment of the present invention, the reaction temperature of the compound of formula II and the compound of formula III may be 0 to 10 ℃, and the reaction time may be 1 to 5 hours; the product of the reaction can be purified by recrystallization, which can be a mixed solvent of dichloromethane and methanol, wherein the volume ratio of dichloromethane to methanol can be 1.

According to an embodiment of the invention, the compound of formula II is prepared by reaction of a compound of formula IV below with a halogenating agent:

wherein R is ₄ Having the definitions as described above.

According to an embodiment of the present invention, the halogenating agent may be selected from, for example, one of a phosphorus halide, a sulfoxide halide (e.g., thionyl chloride), a triphenylphosphine halide, an oxalyl halide; the reaction temperature of the compound of formula IV with the halogenating agent can be in the range of 10-78 deg.C; the reaction time can be 1-10h; the reaction may be carried out in the presence or absence of an additional organic solvent, and preferably, the halogenating agent may serve as a solvent for the above reaction.

According to an embodiment of the invention, the compound of formula III is prepared by the reaction of a compound of formula V below with a compound of formula VI below:

wherein L is selected from a leaving group, such as Cl, br or I;

R ₁ 、R ₂ 、R ₃ 、R ₄ and R ₅ Having the definitions as described above.

According to an embodiment of the present invention, the reaction temperature of the compound of formula V with the compound of formula VI may be 10-90 ℃ and the reaction time may be 10-20h.

According to an embodiment of the present invention, the reaction of the compound of formula V with the compound of formula VI may be carried out in the presence of an organic solvent, which may be selected from alcohol compounds, for example one or more selected from isopropanol, methanol or ethanol.

According to a preferred embodiment of the present invention, the reaction product of the compound of formula V and the compound of formula VI may be purified by recrystallization in an organic solvent, which may be selected from alcoholic compounds, for example from one or more of isopropanol, methanol or ethanol.

According to an embodiment of the present invention, a step of forming an acid addition salt of the compound represented by formula I with an acid may also be included.

The invention also provides a pharmaceutical composition, which comprises a therapeutically effective amount of the compound shown in the formula I, a stereoisomer or a pharmaceutically acceptable salt thereof.

According to the present invention, the pharmaceutical composition further comprises one or more pharmaceutically acceptable carriers or excipients.

According to the present invention, the pharmaceutical composition may further comprise one or more additional therapeutic agents.

Also provided herein is a method of inhibiting cell proliferation in vitro or in vivo, comprising contacting a cell with an effective amount of a compound of formula I, a stereoisomer, or a pharmaceutically acceptable salt thereof, as defined herein.

The invention also provides a method for preventing or treating EGFR and/or HER2 kinase-mediated diseases, comprising administering to a patient a prophylactically or therapeutically effective amount of a compound of formula I, a stereoisomer, or a pharmaceutically acceptable salt thereof.

Also provided herein is a method of treating cancer and/or inhibiting metastasis associated with cancer in a patient in need of such treatment, comprising administering to the patient a prophylactically or therapeutically effective amount of a compound of formula I, a stereoisomer, or a pharmaceutically acceptable salt thereof, as defined herein.

The invention also provides application of the compound shown in the formula I, the stereoisomer or the pharmaceutically acceptable salt thereof in preparing medicines. Preferably, the medicament is for the prevention or treatment of an EGFR and/or HER2 kinase mediated disease, preferably selected from cancer. Or preferably, the medicament is for the prevention or treatment of cancer and/or the inhibition of metastasis associated with cancer.

According to an embodiment of the invention, the cancer may be selected from a hematological cancer or a solid tumor, such as a solid tumor selected from: lung cancer (e.g., small cell lung cancer or non-small cell lung cancer), papillary thyroid cancer, medullary thyroid cancer, differentiated thyroid cancer, recurrent thyroid cancer, refractory differentiated thyroid cancer, lung adenocarcinoma, bronchiolar lung cancer, multiple endocrine tumors of type 2A or 2B (MEN 2A or MEN 2B), pheochromocytoma, parathyroid hyperplasia, breast cancer, colorectal cancer (e.g., metastatic colorectal cancer), papillary renal cell carcinoma, ganglioneuroma disease of the gastrointestinal mucosa, inflammatory myofibroblastoma, or cervical cancer. In some embodiments of any of the methods or uses described herein, the cancer is selected from the group consisting of: <xnotran> (ALL), (AML), , , , , , / , , , , , , , , , , , , , , , , (CLL), (CML), , , , , T , , , , , , , , , , , , , , , , , , (GIST), , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , </xnotran> <xnotran> , , , , / , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ( ), , , , , , , T , , , , , , , , , , , . </xnotran>

In some embodiments, the patient is a human.

When used as a medicament, the compounds of the present invention may be administered in the form of a pharmaceutical composition. These compositions may be prepared in a manner well known in the pharmaceutical arts and may be administered by a variety of routes depending on whether local or systemic treatment is desired and the area to be treated. Can be administered topically (e.g., transdermal, dermal, ocular, and mucosal including intranasal, vaginal, and rectal delivery), pulmonary (e.g., by inhalation or insufflation of powders or aerosols, including by nebulizer; intratracheal, intranasal), orally, or parenterally. Parenteral administration includes intravenous, intraarterial, subcutaneous, intraperitoneal or intramuscular injection or infusion; or intracranial, e.g., intrathecal or intracerebroventricular, administration. The administration may be parenteral in a single bolus form, or may be by, for example, a continuous infusion pump. Pharmaceutical compositions and formulations for topical administration may include transdermal patches, ointments, lotions, creams, gels, drops, suppositories, sprays, liquids and powders. Conventional pharmaceutical carriers, water, powders or oily bases, thickeners and the like may be necessary or desirable. Coated condoms (Coated condoms), gloves and the like may also be useful.

In preparing the compositions of the invention, the active ingredient is typically mixed with an excipient, diluted by an excipient or enclosed within such a carrier, for example, in the form of a capsule, sachet, paper or other container. When the excipient serves as a diluent, it may be a solid, semi-solid, or liquid material that serves as a vehicle, carrier, or medium for the active ingredient. Thus, the composition may be in the form of: tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (solid or dissolved in a liquid vehicle); ointments, soft and hard gelatin capsules, suppositories, sterile injectable solutions and sterile packaged powders containing, for example, up to 10% by weight of the active compound.

Some examples of suitable excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, and methyl cellulose. The formulation may also contain: lubricants such as talc, magnesium stearate and mineral oil; a humectant; emulsifying and suspending agents; preservatives such as methyl benzoate and hydroxypropyl benzoate; sweetening agents and flavoring agents. The compositions of the present invention may be formulated so as to provide immediate, sustained or delayed release of the active ingredient after administration to the patient by employing methods known in the art.

The compositions may be formulated in unit dosage forms, each dosage containing from about 5 to 1000mg, more usually from about 100 to 500mg, of the active ingredient. The term "unit dosage form" refers to physically discrete single dosage units suitable as unitary dosages for human patients and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in admixture with suitable pharmaceutical excipients.

The effective dose of the active compound can vary widely and is generally administered in a pharmaceutically effective amount. However, it will be understood that the amount of the compound actually administered will generally be determined by a physician, in the light of the relevant circumstances, and will include the condition to be treated, the chosen route of administration, the actual compound administered; age, weight and response of the individual patient; severity of patient symptoms, etc.

For preparing solid compositions such as tablets, the principal active ingredient is mixed with pharmaceutical excipients to form a solid preformulation composition containing a homogeneous mixture of the compound of the invention. When referring to these preformulation compositions as homogeneous, it is meant that the active ingredient is generally uniformly distributed throughout the composition such that the composition may be readily divided into equally effective unit dosage forms such as tablets, pills and capsules. The solid pre-formulations are then divided into unit dosage forms of the type described above containing, for example, from about 0.1 to 1000mg of the active ingredient of the invention.

The tablets or pills of the present invention may be coated or compounded to provide a dosage form affording the advantage of prolonged action. For example, a tablet or pill contains an inner dose and an outer dose component, the latter being in the form of a capsule of the former. The two components may be separated by an enteric layer which serves to resist disintegration in the stomach, leaving the inner component intact through the duodenum or delayed in release. A variety of materials may be used for such enteric layers or coatings, such materials including various polymeric acids and mixtures of polymeric acids with such materials as shellac, cetyl alcohol and cellulose acetate.

Liquid forms in which the compounds and compositions of the present invention may be incorporated for oral or injectable administration include aqueous solutions, suitably flavoured syrups, aqueous or oil suspensions; and flavored emulsions with edible oils such as cottonseed oil, sesame oil, coconut oil or peanut oil; as well as elixirs and similar pharmaceutical vehicles.

Compositions for inhalation or insufflation include solutions, suspensions, and powders dissolved in pharmaceutically acceptable water or organic solvents or mixtures thereof. The liquid or solid compositions may contain suitable pharmaceutically acceptable excipients as described above. In certain embodiments, the composition is administered by the oral or nasal respiratory route to achieve a local or systemic effect. The composition may be atomized by use of an inert gas. The nebulized solution may be inhaled directly from the nebulizing device, or the nebulizing device may be connected to a mask or intermittent positive pressure ventilator. The solution, suspension or powder composition may be administered orally or nasally by means of a device that delivers the formulation in a suitable manner.

The amount of compound or composition administered to a patient is not fixed and depends on the drug administered, the purpose of the administration such as prevention or treatment; the condition of the patient, the mode of administration, etc. In therapeutic applications, compositions can be administered to a patient already suffering from a disease in an amount sufficient to cure or at least partially arrest the symptoms of the disease and its complications. The effective dosage will depend on the disease state being treated and the judgment of the attending clinician, which will depend on factors such as the severity of the disease, the age, weight and general condition of the patient.

Therapeutic dosages of the compounds of the invention may be determined, for example, by: the specific use of the treatment, the mode of administration of the compound, the health and condition of the patient, and the judgment of the prescribing physician. The proportion or concentration of the compound of the invention in the pharmaceutical composition may not be fixed and will depend on a variety of factors including dosage, chemical properties (e.g., hydrophobicity), and the route of administration. The compounds of the present invention can be provided, for example, by a physiological buffered aqueous solution containing about 0.1-10% w/v of the compound for parenteral administration. Some typical dosage ranges are from about 1. Mu.g/kg to about 1g/kg body weight/day. In certain embodiments, the dosage range is from about 0.01mg/kg to about 100mg/kg body weight/day. The dosage will likely depend on such variables as the type and extent of progression of the disease or disorder, the general health status of the particular patient, the relative biological efficacy of the selected compound, the excipient formulation and its route of administration. Effective doses can be extrapolated from dose-response curves derived from in vitro or animal model test systems.

Terms and definitions

Unless otherwise indicated, the definitions of radicals and terms described in the specification and claims of the present application, including definitions thereof as examples, exemplary definitions, preferred definitions, definitions described in tables, definitions of specific compounds in the examples, and the like, may be arbitrarily combined and coupled with each other. The definitions of the groups and the structures of the compounds in such combinations and after the combination should fall within the scope of the present specification.

Unless otherwise indicated, the numerical ranges set forth in the specification and claims are equivalent to at least each specific integer recited therein. For example, the numerical range of "1 to 40" is equivalent to describing each of the integer values of the numerical range of "1 to 10", i.e., 1,2, 3,4, 5,6, 7, 8, 9, 10, and each of the integer values of the numerical range of "11 to 40", i.e., 11, 12, 13, 14, 15, 35, 36, 37, 38, 39, 40. It is to be understood that "more" in one, two, or more of the substituents used herein when describing substituents shall mean an integer ≧ 3, such as 3,4, 5,6, 7, 8, 9, or 10. Further, when certain numerical ranges are defined as "numbers," it should be understood to recite both the endpoints of the range, each integer within the range, and each decimal within the range. For example, "a number of 0 to 10" should be understood to recite not only each integer of 0, 1,2, 3,4, 5,6, 7, 8, 9, and 10, but also at least the sum of each integer thereof with 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, respectively.

The term "halogen" or "halo" means one of fluorine, chlorine, bromine and iodine.

The term "C _1-40 Alkyl "is understood to preferably mean a straight-chain or branched, saturated monovalent hydrocarbon radical having from 1 to 40 carbon atoms. For example, "C _1-6 Alkyl "denotes straight-chain and branched alkyl groups having 1,2, 3,4, 5 or 6 carbon atoms. <xnotran> , , , , , , , , , , ,2- ,1- ,1- ,1,2- , ,1,1- ,4- ,3- ,2- ,1- ,2- ,1- ,3,3- ,2,2- ,1,1- </xnotran>Butyl, 2, 3-dimethylbutyl, 1, 3-dimethylbutyl or 1, 2-dimethylbutyl, and the like or isomers thereof.

The term "C _2-40 Alkenyl "is understood to preferably mean a straight-chain or branched monovalent hydrocarbon radical comprising one or more double bonds and having from 2 to 40 carbon atoms, preferably" C _2-6 Alkenyl ". "C _2-6 Alkenyl "is understood to preferably mean a straight-chain or branched monovalent hydrocarbon radical which contains one or more double bonds and has 2,3, 4,5 or 6 carbon atoms, in particular 2 or 3 carbon atoms (" C) _2-3 Alkenyl "), it being understood that in the case where the alkenyl group comprises more than one double bond, the double bonds may be separated from each other or conjugated. The alkenyl group is, for example, vinyl, allyl, (E) -2-methylvinyl, (Z) -2-methylvinyl, (E) -but-2-enyl, (Z) -but-2-enyl, (E) -but-1-enyl, (Z) -but-1-enyl, pent-4-enyl, (E) -pent-3-enyl, (Z) -pent-3-enyl, (E) -pent-2-enyl, (Z) -pent-2-enyl, (E) -pent-1-enyl, (Z) -pent-1-enyl, hex-5-enyl, (E) -hex-4-enyl, (Z) -hex-4-enyl, (E) -hex-3-enyl, (Z) -hex-3-enyl, (E) -hex-2-enyl, (Z) -hex-2-enyl, (E) -hex-1-enyl, (Z) -hex-1-enyl, isopropenyl, 2-methylprop-2-enyl, 1-methylprop-2-enyl, 2-methylprop-1-enyl, (E) -1-methylprop-1-enyl, (Z) -1-methylprop-1-enyl, 3-methylbut-3-enyl, 2-methylbut-3-enyl, 1-methylbut-3-enyl, 3-methylbut-2-enyl, (E) -2-methylbut-2-enyl, (Z) -2-methylbut-2-enyl, (E) -1-methylbut-2-enyl, (Z) -1-methylbut-2-enyl, (E) -3-methylbut-1-enyl, (Z) -3-methylbut-1-enyl, (E) -2-methylbut-1-enyl, (Z) -2-methylbut-1-enyl, (E) -1-methylbut-1-enyl, (Z) -1-methylbut-1-enyl, 1-dimethylprop-2-enyl, 1-ethylprop-1-enyl, 1-propylvinyl, 1-isopropylvinyl.

The term "C _3-40 Cycloalkyl "is understood to mean a saturated monovalent monocyclic, bicyclic hydrocarbon ring or bridged cycloalkane having from 3 to 40 carbon atoms, preferably" C _3-10 Cycloalkyl ". The term "C _3-10 Cycloalkyl is understood to mean a saturated monovalent monocyclic, bicyclic hydrocarbon ring or bridged cycloalkane having 3,4, three, four, or six carbon atoms,5. 6, 7, 8, 9 or 10 carbon atoms. Said C is _3-10 Cycloalkyl groups may be monocyclic hydrocarbon groups such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, or cyclodecyl, or bicyclic hydrocarbon groups such as decalin rings.

The term "3-20 membered heterocyclyl" means a saturated monovalent monocyclic, bicyclic hydrocarbon ring or bridged cycloalkane comprising a total of 1-5 heteroatoms independently selected from N, O and S, a non-aromatic cyclic group having a total ring atom number of 3-20 (e.g. atoms number 3,4, 5,6, 7, 8, 9, 10, etc.), preferably "3-10 membered heterocyclyl". The term "3-10 membered heterocyclyl" means a saturated monovalent monocyclic, bicyclic hydrocarbon ring or bridged cycloalkane comprising 1-5, preferably 1-3 heteroatoms selected from N, O and S. The heterocyclic group may be attached to the rest of the molecule through any of the carbon atoms or nitrogen atom (if present). In particular, the heterocyclic group may include, but is not limited to: 4-membered rings such as azetidinyl, oxetanyl; 5-membered rings such as tetrahydrofuranyl, dioxolyl, pyrrolidinyl, imidazolidinyl, pyrazolidinyl, pyrrolinyl; or a 6-membered ring such as tetrahydropyranyl, piperidinyl, morpholinyl, dithianyl, thiomorpholinyl, piperazinyl or trithianyl; or a 7-membered ring such as diazepanyl. Optionally, the heterocyclic group may be benzo-fused. The heterocyclyl group may be bicyclic, for example but not limited to a 5,5 membered ring, such as a hexahydrocyclopenta [ c ] pyrrol-2 (1H) -ring, or a 5,6 membered bicyclic ring, such as a hexahydropyrrolo [1,2-a ] pyrazin-2 (1H) -ring. The nitrogen atom containing ring may be partially unsaturated, i.e., it may contain one or more double bonds, such as, but not limited to, 2, 5-dihydro-1H-pyrrolyl, 4H- [1,3,4] thiadiazinyl, 4, 5-dihydrooxazolyl, or 4H- [1,4] thiazinyl, or it may be benzo-fused, such as, but not limited to, dihydroisoquinolinyl. According to the invention, the heterocyclic radical is non-aromatic. When the 3-20 membered heterocyclic group is linked to another group to form the compound of the present invention, the carbon atom of the 3-20 membered heterocyclic group may be linked to another group, or the heterocyclic atom of the 3-20 membered heterocyclic ring may be linked to another group. For example, when the 3-20 membered heterocyclyl group is selected from piperazinyl, it may be that the nitrogen atom on the piperazinyl is attached to another group. Or when the 3-20 membered heterocyclyl group is selected from piperidinyl, it may be that the nitrogen atom on the piperidinyl ring and the carbon atom in the para position are attached to other groups.

The term "C _6-20 Aryl "is to be understood as preferably meaning a mono-, bi-or tricyclic hydrocarbon ring of monovalent or partially aromatic character having from 6 to 20 carbon atoms, preferably" C _6-14 Aryl ". The term "C _6-14 Aryl "is to be understood as preferably meaning a mono-, bi-or tricyclic hydrocarbon ring having a monovalent or partially aromatic character with 6, 7, 8, 9, 10, 11, 12, 13 or 14 carbon atoms (" C _6-14 Aryl group "), in particular a ring having 6 carbon atoms (" C ₆ Aryl "), such as phenyl; or biphenyl, or is a ring having 9 carbon atoms ("C ₉ Aryl), such as indanyl or indenyl, or a ring having 10 carbon atoms ("C ₁₀ Aryl radicals), such as tetralinyl, dihydronaphthyl or naphthyl, or rings having 13 carbon atoms ("C ₁₃ Aryl radicals), such as the fluorenyl radical, or a ring having 14 carbon atoms ("C) ₁₄ Aryl), such as anthracenyl. When said C is _6-20 When the aryl group is substituted, it may be mono-or polysubstituted. And, the substitution site thereof is not limited, and may be, for example, ortho-, para-or meta-substitution.

The term "5-20 membered heteroaryl" is understood to include such monovalent monocyclic, bicyclic or tricyclic aromatic ring systems: having 5 to 20 ring atoms and containing 1 to 5 heteroatoms independently selected from N, O and S, e.g., "5-14 membered heteroaryl". The term "5-14 membered heteroaryl" is understood to include such monovalent monocyclic, bicyclic or tricyclic aromatic ring systems: which has 5,6, 7, 8, 9, 10, 11, 12, 13 or 14 ring atoms, in particular 5 or 6 or 9 or 10 carbon atoms, and which comprises 1 to 5, preferably 1 to 3, heteroatoms each independently selected from N, O and S and, in addition, can in each case be benzo-fused. In particular, heteroaryl is selected from thienyl, furyl, pyrrolyl, oxazolyl, thiazolyl, imidazolyl, pyrazolyl, isoxazolyl, isothiazolyl, oxadiazolyl, triazolyl, thiadiazolyl, thia-4H-pyrazolyl and the like and their benzo derivatives, such as benzofuranyl, benzothienyl, benzoxazolyl, benzoisoxazolyl, benzimidazolyl, benzotriazolyl, indazolyl, indolyl, isoindolyl and the like; or pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl, and the like, and benzo derivatives thereof, such as quinolyl, quinazolinyl, isoquinolyl, and the like; or azocinyl, indolizinyl, purinyl and the like and benzo derivatives thereof; or cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, naphthyridinyl, pteridinyl, carbazolyl, acridinyl, phenazinyl, phenothiazinyl, phenoxazinyl, and the like. When the 5-20 membered heteroaryl group is linked to another group to form the compound of the present invention, the carbon atom on the 5-20 membered heteroaryl ring may be linked to another group, or the heteroatom on the 5-20 membered heteroaryl ring may be linked to another group. When the 5-20 membered heteroaryl group is substituted, it may be mono-or poly-substituted. And, there is no limitation on the substitution site thereof, and for example, hydrogen bonded to a carbon atom on a heteroaryl ring may be substituted, or hydrogen bonded to a heteroatom on a heteroaryl ring may be substituted.

Unless otherwise specified, heterocyclyl, heteroaryl or heteroarylene include all possible isomeric forms thereof, e.g., positional isomers thereof. Thus, for some illustrative non-limiting examples, forms may be included that are substituted at one, two or more of their 1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10-, 11-, 12-positions, etc. (if present) or bonded to other groups, including furan-2-yl, furan-2-ylidene, furan-3-yl, furan-3-ylidene.

The term "oxo" refers to an oxy substitution (= O) formed when a carbon atom, a nitrogen atom, or a sulfur atom in a substituent is oxidized.

Unless otherwise indicated, the definitions of terms herein apply equally to groups comprising the term, e.g. C _1-6 The definition of alkyl also applies to C _1-6 Alkyloxy, -N (C) _1-6 Alkyl radical) ₂ 、-NHC _1-6 Alkyl or-S (O) ₂ -C _1-6 Alkyl groups, and the like.

It will be appreciated by those skilled in the art that the compounds of formula I may exist in the form of various pharmaceutically acceptable salts. If these compounds have a basic center, they can form acid addition salts; if these compounds have an acidic center, they can form base addition salts; if these compounds contain both an acidic center (e.g. carboxyl) and a basic center (e.g. amino), they can also form internal salts. The number of salt formation of the compounds in this application is determined by the basic or acidic centers. For example, when a compound contains multiple salt formation sites, the number of salt formation is equal to the number of salt formation sites. By way of example, acid addition salts include, but are not limited to: hydrochloride, hydrofluoride, hydrobromide, hydroiodide, sulfate, pyrosulfate, phosphate, nitrate, methanesulfonate, ethanesulfonate, 2-hydroxyethanesulfonate, benzenesulfonate, toluenesulfonate, sulfamate, 2-naphthalenesulfonate, formate, acetoacetic acid, pyruvic acid, lauric acid ester, cinnamate, benzoate, acetate, glyoxylate, trifluoroacetate, pivalate, propionate, butyrate, hexanoate, heptanoate, undecanoate, stearate, ascorbate, camphorate, camphorsulfonate, citrate, fumarate, malate, maleate, hydroxymaleate, oxalate, salicylate, succinate, gluconate, quinic acid salt, pamoate, glycolate, tartrate, lactate, 2- (4-hydroxybenzoyl) benzoate, cyclopentanepropionate, digluconate, 3-hydroxy-2-naphthoate, nicotinate, pamoate, pectinate, 3-phenylpropionate, picrate, pivalate, itaconate, trifluoromethanesulfonate, dodecylsulfate, p-toluenesulfonate, napadilate, disulfonate, salicylate, heptanoate, salicylate, thiocyanate, sulfate, succinate, salicylate, or thiocyanate.

Depending on their molecular structure, the compounds of the invention exist as stereoisomers, which may be, for example, chiral or cis-trans isomeric, and may thus exist in the form of various enantiomers or diastereomers.

For cis-trans isomers, the two atoms or groups attached to each carbon atom should be compared according to the "order rule" known to those skilled in the art, with the Z isomer being the preferred group on the same side of the pi bond plane and the E isomer on the opposite side.

For chiral isomers, they may exist in racemic or optically active form. The compounds of the invention or intermediates thereof may be separated into enantiomeric compounds by chemical or physical methods well known to those skilled in the art, or used in this form for synthesis. In the case of racemic amines, diastereomers are prepared from mixtures by reaction with optically active resolving agents. Examples of suitable resolving agents are optically active acids such as the R and S forms of tartaric acid, diacetyltartaric acid, dibenzoyltartaric acid, mandelic acid, malic acid, lactic acid, suitable N-protected amino acids (e.g. N-benzoylproline or N-benzenesulfonylproline) or various optically active camphorsulphonic acids. The chromatographic enantiomeric resolution can also advantageously be carried out with the aid of optically active resolving agents, such as dinitrobenzoylphenylglycine, cellulose triacetate or other carbohydrate derivatives or chirally derivatized methacrylate polymers, which are immobilized on silica gel. Suitable eluents for this purpose are aqueous or alcoholic solvent mixtures, for example hexane/isopropanol/acetonitrile. The corresponding stable isomers can be isolated according to known methods, for example by extraction, filtration or column chromatography.

The term "patient" refers to any animal, including mammals, preferably mice, rats, other rodents, rabbits, dogs, cats, pigs, cattle, sheep, horses, or primates, most preferably humans.

The phrase "therapeutically effective amount" as used herein, refers to an amount of an active compound or pharmaceutical agent that elicits a biological or medicinal response that is being sought by a researcher, veterinarian, medical doctor or other clinician in a tissue, system, animal, individual, or human which includes one or more of the following: (1) prevention of diseases: for example, preventing a disease, disorder or condition in an individual who is susceptible to the disease, disorder or condition but has not experienced or developed disease pathology or symptomatology. (2) inhibition of diseases: for example, inhibiting the disease, disorder or condition (i.e., arresting the further development of the pathology and/or condition) in an individual who is experiencing or presenting the pathology or condition of the disease, disorder or condition. (3) relieving the disease: such as relieving the disease, disorder or condition (i.e., reversing the pathology and/or symptomatology) in an individual who is experiencing or developing the pathology or symptomatology of the disease, disorder or condition.

Advantageous effects

The compound is modified by adopting furyl at 6-position of a quinoline skeleton, and simultaneously modifies a substituent at 4-position of the quinoline skeleton, so that a novel anti-tumor active compound is designed and synthesized. Compared with the existing antitumor drugs, the compounds have excellent antitumor activity on A431, SKOV3, SK-BR-3, BT474 and the like, and have good application prospects. In addition, the preparation method of the compound has the advantages of low cost, simple steps, mild reaction conditions, high yield and easy post-treatment.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.

Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.

Example 1: (E) Synthesis of (a) -N- (4- (4- (benzyloxy) anilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide

(1) Synthesis of trans-3- (2-furyl) acryloyl chloride (a-1)

Adding trans-3- (2-furyl) acrylic acid into a three-necked flask with a thermometer and 50mL of electromagnetic stirring

(0.003mol, 0.41g), 7mL thionyl chloride, reflux reaction under nitrogen for 4h, reduced pressure distillation of the remaining solvent, reduced pressure solvent removal, light yellow oil 0.44g, yield 95.0%.

(2) Synthesis of N- (4- (4- (benzyloxy) phenylamino) -3-cyano-7-ethoxyquinolin-6-yl) acetamide (a-2)

To a 500mL three necked flask equipped with a thermometer, magnetic stirrer was added N- (4-chloro-3-cyano-7-ethoxyquinolin-6-yl) acetamide (0.024mol, 6.90g), 4- (benzyloxy) aniline (0.026mol, 5.17g) and (0.026mol, 3.0 g) pyridine hydrochloride, 250mL isopropanol, TLC follow-up with a developing solvent of petroleum ether: volume ratio of ethyl acetate 1:1, stirring, refluxing for 12h, standing, filtering, and recrystallizing with methanol to obtain 9.05g and 83% of N- (4- (4- (benzyloxy) phenylamino) -3-cyano-7-ethoxyquinolin-6-yl) acetamide.

¹ H NMR(DMSO-d ₆ ):δ11.01(br，s,1H),9.61(s,1H),9.05(s,1H),8.94(s,1H),7.49-7.50(m,3H),7.33-7.474(m,5H),7.12(d,J＝8.8Hz,2H),5.16(s,2H)4.33(q,J＝6.8Hz,2H),2.19(s,3H)1.49(t,J＝6.8Hz,3H)。

(3) Synthesis of 4- (4- (benzyloxy) aniline) -6-amino-7-ethoxyquinoline-3-carbonitrile (a-3)

N- (4- (4- (benzyloxy) phenylamino) -3-cyano-7-ethoxyquinolin-6-yl) acetamide (a-2) (0.023mol, 10.0 g) was dissolved in 200mL of methanol, and (40mL 2N) HCl was added, followed by TLC at 60 ℃ with the developer being petroleum ether: volume ratio of ethyl acetate 1:2, reacting for 24 hours, removing residual solvent by rotary evaporation, stirring residual solid for 1 hour by using saturated sodium bicarbonate aqueous solution, filtering, and recrystallizing a filter cake by using methanol to obtain 8.95g of yellow solid with the yield of 90 percent.

¹ H NMR(DMSO-d ₆ ):δ10.62(br,S,1H),8.77(s,1H),7.57(s,1H),7.48(d,J＝7.2Hz,2H),7.33-7.43(m,6H),7.08-7.11(m,2H),5.48(br，S，2H)5.16(s,2H),4.26(q,J＝6.8Hz,2H),1.48(t,J＝6.8Hz,3H)

(4) Synthesis of (E) -N- (4- (4- (benzyloxy) anilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide Synthesis (a-4)

Trans-3- (2-furyl) acryloyl chloride (a-1) (0.0026 mol, 0.40g) was dissolved in N-methylpyrrolidone (3 mL) and transferred to a constant pressure titration funnel, a solution of 4- (4- (benzyloxy) aniline) -6-amino-7-ethoxyquinoline-3-carbonitrile (0.002mol, 0.82g) in N-methylpyrrolidone (2 mL) was added dropwise, with nitrogen protection at 0 ℃, TLC tracing, and the developing solvent was petroleum ether: ethyl acetate volume ratio 1:1 for two hours, stirring the reaction solution by using a saturated sodium bicarbonate solution to adjust the pH value to 11, filtering, mixing a filter cake by using dichloromethane and methanol in a ratio of 1:4 to give (E) -N- (4- (4- (benzyloxy) anilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide (0.92g, 87%).

¹ H NMR(DMSO-d ₆ ):δ9.64(s,1H),9.58(s,1H),9.01(s,1H),8.42(s,1H),7.85(s,1H),7.21-7.49(m,9H),6.98-7.05(m,3H),6.88(d,J＝3.2Hz,1H),6.63-6.64(m,1H),5.12(s,2H),4.31(q,J＝6.8Hz,2H),1.48(t,J＝6.8Hz,3H)

¹³ C NMR(DMSO-d ₆ ):δ163.80,156.34,153.20,152.55,150.95,150.89,147.53,145.21,136.99,132.87,128.39,127.80,127.72,127.55,126.20,119.38,117.23,115.21,115.04,114.75,112.92,112.61,108.65,86.39,69.46,64.50,14.27

ESI-HRMS cacld.ForC32H26N4O4[M+H] ⁺ :531.2032,found 531.2025

Example 2: (E) Synthesis of (b) -N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide

(1) Synthesis of N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) acetamide (b-1)

According to the method of step (2) in example 1, N- (4-chloro-3-cyano-7-ethoxyquinolin-6-yl) acetamide (0.024mol, 6.90g), 4-chloroaniline (0.026mol, 3.30g), and (0.026mol, 3.00g) pyridine hydrochloride, 250mL isopropyl alcohol were added to a 500mL three-necked flask equipped with a thermometer, electromagnetic stirrer, and a developing solvent of petroleum ether: volume ratio of ethyl acetate 1:1, stirring, refluxing and reacting for 12h, standing, filtering, and recrystallizing by methanol to obtain an intermediate b-1 (7.90g, 87%).

¹ H NMR(DMSO-d ₆ ):δ11.09(br,s,1H),9.62(s,1H),9.08(s,1H),9.01(s,1H),7.62(s,1H),7.53-7.56(m,2H),7.44-7.47(m,2H),4.33(q,J＝6.8Hz,2H),2.11(s,3H),1.50(t,J＝6.8Hz,3H)

(2) Synthesis of 4- (4-chloroanilino) -6-amino-7-ethoxyquinoline-3-carbonitrile (b-2)

According to the procedure of step (3) in example 1, (0.023mol, 8.74g) N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) acetamide (b-1) was dissolved in 200mL of methanol, HCl (40mL 2N) was added, 60 ℃, TLC follow-up was performed, and the developing solvent was petroleum ether: ethyl acetate volume ratio 1:2, reacting for 24h, removing residual solvent by rotary evaporation, stirring residual solid for 1h by using saturated sodium bicarbonate aqueous solution, filtering, and recrystallizing a filter cake by using methanol to obtain 7.15g of yellow solid with the yield of 92%.

¹ H NMR(DMSO-d ₆ ):δ10.72(s,1H),8.83(s,1H),7.41-7.55(m,6H),5.95(br,s,2H),4.26(q,J＝6.8Hz,2H),1.49(t,J＝6.8Hz,3H)

(3) (b-3) Synthesis of (E) -N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide

According to the method of step (4) in example 1, trans-3- (2-furyl) acryloyl chloride (a-1) (0.40g, 0.0026 mol) was dissolved in N-methylpyrrolidone (3 mL) and transferred to a constant pressure titration funnel, a solution of 4- (4-chloroaniline) -6-amino-7-ethoxyquinoline-3-carbonitrile (b-2, 0.68g, 0.002mol) in N-methylpyrrolidone (2 mL) was added dropwise, the reaction was carried out at 0 ℃, under nitrogen protection, TLC follow-up, petroleum ether: ethyl acetate volume ratio 1:1 for two hours, stirring the reaction solution by using a saturated sodium bicarbonate solution to adjust the pH value to 11, filtering, mixing a filter cake by using dichloromethane and methanol according to a mixing ratio of 1: the mixture of 4 was recrystallized to give (E) -N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide (0.84g, 92%). ¹ H NMR(DMSO-d ₆ ):δ9.70(s,1H),9.65(s,1H),9.07(s,1H),8.57(s,1H),7.85(d,J＝1.2Hz,1H),7.39-7.43(m,4H),7.22(d,J＝8.4Hz,2H),7.03(d,J＝15.6Hz,1H),6.88(9,J＝3.6Hz,1H),6.63-6.64(m,1H),4.33(q,J＝6.8Hz,2H),1.49(t,J＝6.8Hz,3H)

¹³ C NMR(DMSO-d ₆ ):δ163.93,153.17,151.87,150.95,149.76,147.81,145.25,139.77,128.83,128.24,127.74,127.69,123.50,119.34,117.09,114.86,114.37,114.30,112.63,108.57,89.75,64.67,14.24

ESI-HRMS cacld.For C25H19ClN4O3[M+H] ⁺ :459.1223,found 459.1219

Example 3: (E) Synthesis of (c) -N- (4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide

(1) Synthesis of N- (4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -3-cyano-7-ethoxyquinolin-6-yl) acetamide (c-1)

According to the method of step (2) in example 1, N- (4-chloro-3-cyano-7-ethoxyquinolin-6-yl) acetamide (0.024mol, 6.90g), 4- (3-fluorobenzyloxy) -3-chloroaniline (0.026mol, 6.53g) and (0.026mol, 3.0 g) pyridine hydrochloride were charged into a 500mL three-necked flask equipped with a thermometer and electromagnetic stirring, and 250mL of isopropanol was subjected to TLC tracing using a developing solvent of petroleum ether: ethyl acetate volume ratio 1:1, stirred and refluxed for 12 hours, left to stand, filtered with suction, and recrystallized from methanol to give intermediate c-1 (10.52g, 87%).

¹ H NMR(DMSO-d ₆ ):δ11.09(br,s,1H),9.62(s,1H),8.98-9.10(m,2H)7.59-7.63(m,2H)7.27-7.50(m,5H),7.17-7.21(m,1H),5.31(s,2H)4.33(q,J＝6.8Hz,2H),2.19(s,3H)1.50(t,J＝6.8Hz,3H)

(2) Synthesis of 4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -6-amino-7-ethoxyquinoline-3-carbonitrile (c-2)

According to the procedure of step (3) in example 1, (0.023mol, 11.59g) N- (4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -3-cyano-7-ethoxyquinolin-6-yl) acetamide (c-1) was dissolved in 200mL of methanol, and (40mL of 2N) HCl was added, 60 ℃, TLC follow-up detection, petroleum ether: ethyl acetate volume ratio 1:2, reacting for 24h, removing residual solvent by rotary evaporation, stirring residual solid for 1h by using saturated sodium bicarbonate aqueous solution, filtering, and recrystallizing a filter cake by using methanol to obtain yellow solid 9.82g with the yield of 93 percent.

¹ H NMR(DMSO-d ₆ ):δ10.70(s,1H),8.79(s,1H),7.29-7.50(m,8H),7.17-7.21(m,1H),5.94(br，s,2H)5.30(s,2H),4.26(q,J＝6.8Hz,2H),1.48(t,J＝6.8Hz,3H)

(3) (c-3) Synthesis of (E) -N- (4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide

According to the method of step (4) in example 1, trans-3- (2-furyl) acryloyl chloride (a-1) (0.40g, 0.0026 mol) was dissolved in N-methylpyrrolidone (3 mL) and transferred to a constant pressure titration funnel, a solution of 4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -6-amino-7-ethoxyquinoline-3-carbonitrile (c-2, 0.92g, 0.002mol) in N-methylpyrrolidone (2 mL) was added dropwise, 0 ℃, nitrogen protected, TLC chased, and the developing agent was petroleum ether: ethyl acetate volume ratio 1:1 for two hours, stirring the reaction solution by using a saturated sodium bicarbonate solution to adjust the pH value to 11, filtering, mixing a filter cake by using dichloromethane and methanol according to a mixing ratio of 1: recrystallization of the mixture of 4 gave 1.03 g of a yellow solid in 89% yield.

¹ H NMR(DMSO-d ₆ ):δ9.65(s,2H),9.04(s,1H),8.48(s,1H),7.85(s,1H),7.16-7.50(m,9H),7.03(d，J＝16Hz,1H),6.88(s,1H),6.64(s,1H),5.25(s,2H),4.32(q,J＝6.8Hz,2H),1.49(t,J＝6.8Hz,3H)

¹³ C NMR(DMSO-d ₆ ):δ163.86,163.38,160.96,153.16,152.26,150.95,150.40,147.59,145.23,139.50 134.04,130.49,127.86,127.65,125.73,123.94,123.34,121.60,119.37,117.22,114.80,114.56,114.42,114.14,113.92,113.27,112.62,108.62,87.39,69.43,64.58,14.26

ESI-HRMS cacld.For C ₃₂ H ₂₄ ClFN ₄ O ₄ [M+H] ⁺ :583.1548,found 583.1544

In vitro antitumor Activity test example

The principle is as follows: succinate dehydrogenase in the mitochondria of living cells is able to reduce thiazole blue (MTT) to water-insoluble purple needle crystals Formazan 29914s (Formazan) and deposit in the cells, whereas dead cells do not have this function. Dimethyl sulfoxide (DMSO) dissolves blue-violet crystals in cells and has a maximum absorption peak at 490 nm. Thus, the number of living cells can be reflected by measuring the absorbance at a wavelength of 490 nm. The amount of formazan formation is directly proportional to the number of cells over a range of cell numbers.

Test cell

Human epidermal carcinoma cells A431, breast cancer cells SKBR3 and BT474 and ovarian cancer cell strains SKOV3, wherein the A431 cells are purchased from Shanghai Zhonghami academy cell banks, the SK-BR-3 cells are purchased from Wuhan Punuoise Life science and technology Co., ltd, the SKOV3 cells and the BT474 cells are purchased from Shanghai Saibui biotech Co., ltd.

Main instrument and consumable

Biosafety cabinets, model HR60-II42, haier, china

CO ₂ Incubator, model IL-161HT, shanghai, china

Inverted biomicroscope model CKX41SF, olympus, japan

Air bath constant temperature shaking table, guohua corporation, model ZD-85

Full-automatic multifunctional microplate reader manufactured by Bio-Rad of America

Precision adjustable micropipettes, eppendorf (germany);

96-well cell culture plates, corning (usa);

cell culture flasks, corning (USA).

Primary reagent

Fetal bovine serum, GEMINI corporation;

trypsin, gibco;

RPMI1640 medium (Beijing Solarbio Science & Technology Co., ltd.), DMEM medium (Beijing Solarbio Science & Technology Co., ltd.), DMSO and tetramethylazo blue (MTT), sigma USA.

The experimental procedure was as follows:

cell culture

Culturing human epidermal carcinoma cell A431 in DMEM medium, culturing adenocarcinoma SKBR3 cell in DMEM medium, culturing breast cancer BT474 cell in 1640 medium, saturating at 37 deg.C with 5% CO ₂ Performing conventional culture in an incubator; subculture was performed every 2-3d with 1 change of medium when the cells grew to logarithmic phase. Cell activity was detected during the experiment using trypan blue staining.

Preparing working solution

Preparation of MTT solution: MTT50mg is weighed, dissolved in 10mL Phosphate Buffer Solution (PBS), filtered and sterilized by a 0.22 mu m microporous filter, subpackaged, stored at 4 ℃ in a dark place and effective within two weeks.

Preparation of test drugs: the compounds a-c prepared in examples 1-3 and DMSO were dissolved in 50mmol/L of stock solution, and the stock solution was diluted with culture medium to different concentrations of working solution, such as 50. Mu. Mol/L, 25. Mu. Mol/L, 12.5. Mu. Mol/L, 6.25. Mu. Mol/L, and 3.125. Mu. Mol/L, by precise aspiration before use.

Measurement method

1. Taking logarithmic phase A431, SKBR3, SKOV3 and BT474 cells, digesting, centrifuging and resuspending, respectively adjusting the cell density to 8 x 10 ⁴ 1X 10 units/mL ⁵ 2X 10 units/mL ⁵ one/mL of the cells were seeded in a 96-well cell culture plate, and 100. Mu.l of the prepared cell suspension was added to each well, and then the plate was placed in a cell incubator for culture.

2. After waiting overnight, i.e., after the cells were adherent, the upper layer of culture was discarded. The test group was added with 100. Mu.l of compound (a-c) at concentrations of 50. Mu. Mol/L, 25. Mu. Mol/L, 12.5. Mu. Mol/L, 6.25. Mu. Mol/L, and 3.125. Mu. Mol/L, respectively, 3 duplicate wells per concentration, and a negative control group (to which an equal volume of cell suspension was added) and a blank control group (to which an equal volume of medium was added).

3. After the 96-well plates were incubated for 48 hours, 20. Mu.l of MTT solution (5 mg/ml) was added to each well, and the incubation was continued in the incubator for 4 hours.

4. The 96-well plate was taken out of the incubator, the medium in the well was carefully aspirated off by a micropipette, 150. Mu.L of dimethyl sulfoxide was added to each well, the crystals were completely dissolved by shaking for 10 minutes on a horizontal shaker, and then the absorbance OD value was measured at a wavelength of 490nm using a microplate reader.

5. The test was repeated three times in succession, and the cell inhibition rate was calculated according to the following formula: cell inhibition ratio (%) = [1-, (Test group OD value-blank control group OD)/(negative control well OD value-blank control group OD]X 100%, and calculating the half inhibitory concentration IC of the sample for inhibiting cell growth ₅₀ The value is obtained.

The results of the experiments showed that less than 0.1v% dmso solvent had negligible effect on the cells, IC50 values were calculated using the statistical software spss13.0 and the results of the experiments are summarized in table 1.

Table 1: in vitro antitumor Activity of target Compounds IC ₅₀ Data (. Mu.mol/L)

Compound (I)	A431	SKBR3	BT474	SKOV3
					a	2.92	6.68	5.67	0.48
b	13.83	17.20	12.35	7.23
					c	9.74	14.06	9.50	5.12

The results show that the compounds a, b and c of the embodiment of the invention have obvious proliferation inhibition activity on tumor cells A431, SKBR3, SKOV3 and BT 474.

Claims (14)

1. A compound represented by the following formula I:

wherein R is ₁ Selected from CN, halogen;

R ₂ selected from the group consisting of _b Substituted phenyl;

R ₃ is selected from H;

R ₄ selected from furan-2-yl;

R ₅ selected from straight or branched alkyl groups having 1,2, 3,4, 5 or 6 carbon atoms;

each R _b Independently of one another, from halogen, CN, by R _e Substituted methyl or by R _e A substituted methoxy group;

R _e selected from unsubstituted or substituted by one or more R _f Substituted phenyl;

each R _f Identical or different, independently of one another, from halogen, CN.

2. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein:

R ₁ selected from CN;

R ₂ selected from the group consisting of _b Substituted phenyl;

R ₃ is selected from H;

R ₅ selected from linear or branched alkyl groups having 1,2 or 3 carbon atoms;

each R _b Independently of one another, from fluorine, chlorine, bromine, by R _e Substituted methyl or by R _e A substituted methoxy group;

R _e selected from unsubstituted or substituted by one or more R _f Substituted phenyl;

each R _f Identical or different, independently of one another, from fluorine, chlorine, bromine.

3. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein the compound of formula I has the structure shown in formula I-1 below:

R ₁ selected from CN;

R ₂ is selected from R _b Substituted phenyl;

R ₃ is selected from H;

R ₅ is selected from ethyl;

each R _b Independently of one another, from fluorine, chlorine, by R _e Substituted methyl or by R _e A substituted methoxy group;

R _e selected from unsubstituted or substituted by one or more R _f Substituted phenyl;

each R _f Identical or different, independently of one another, from fluorine, chlorine.

4. The compound of any one of claims 1-3, or a pharmaceutically acceptable salt thereof, wherein:

R ₂ selected from 4- (benzyloxy) phenyl, 4-chlorophenyl, 4- (3-fluorobenzyloxy) -3-chlorophenyl.

5. The compound of claim 1, or a pharmaceutically acceptable salt thereof, wherein the compound of formula I is selected from the group consisting of:

(E) -N- (4- (4- (benzyloxy) anilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide;

(E) -N- (4- (4-chloroanilino) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide;

(E) -N- (4- (4- (3-fluorobenzyloxy) -3-chloroaniline) -3-cyano-7-ethoxyquinolin-6-yl) -3- (furan-2-yl) acrylamide.

6. A process for preparing a compound according to any one of claims 1 to 5, or a pharmaceutically acceptable salt thereof, comprising reacting a compound of formula II with a compound of formula III to give a compound of formula I:

wherein R is ₁ 、R ₂ 、R ₃ 、R ₄ And R ₅ Having the definition as set forth in any one of claims 1 to 5.

7. A process according to claim 6, wherein the reaction of the compound of formula II with the compound of formula III is carried out in the presence of an organic solvent selected from N-methylpyrrolidone;

the reaction temperature of the compound of formula II and the compound of formula III is 0-10 ℃.

8. The production method according to claim 7, wherein the product of the reaction is purified by recrystallization, and the recrystallization solvent is a mixed solvent of dichloromethane and methanol.

9. The method according to claim 8, wherein the volume ratio of dichloromethane to methanol is 1.

10. The production method according to any one of claims 6 to 9, wherein:

the compound of formula II is prepared by reacting a compound of formula IV below with a halogenating agent:

wherein R is ₄ Having the definition set forth in any one of claims 1 to 5;

and/or the presence of a gas in the gas,

the compound of formula III is prepared by the reaction of a compound of formula V below with a compound of formula VI below:

wherein L is selected from Cl, br or I;

R ₁ 、R ₂ 、R ₃ 、R ₄ and R ₅ Having the definition as set forth in any one of claims 1 to 5.

11. A pharmaceutical composition comprising a therapeutically effective amount of a compound of formula I according to any one of claims 1 to 5, or a pharmaceutically acceptable salt thereof.

12. Use of a compound of formula I as described in any one of claims 1-5, or a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for the prevention or treatment of cancer and/or the inhibition of metastasis associated with cancer.

13. The use of claim 12, wherein the cancer is selected from the group consisting of breast cancer, ovarian cancer, and skin cancer.

14. The use of claim 13, wherein the cancer cells of the cancer are selected from the group consisting of human epidermal carcinoma cell a431, breast cancer cell SKBR3, breast cancer cell BT474, or ovarian cancer cell SKOV3.