WO1997024334A1 - Benzimidazole derivatives - Google Patents

Benzimidazole derivatives Download PDF

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Publication number
WO1997024334A1
WO1997024334A1 PCT/JP1996/003858 JP9603858W WO9724334A1 WO 1997024334 A1 WO1997024334 A1 WO 1997024334A1 JP 9603858 W JP9603858 W JP 9603858W WO 9724334 A1 WO9724334 A1 WO 9724334A1
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Prior art keywords
group
lower alkyl
alkyl group
aryl
benzimidazole
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PCT/JP1996/003858
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English (en)
French (fr)
Japanese (ja)
Inventor
Noritsugu Yamasaki
Takafumi Imoto
Yoshiyuki Murai
Takahiro Hiramura
Teruo Oku
Kouzou Sawada
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Fujisawa Pharmaceutical Co Ltd
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Fujisawa Pharmaceutical Co Ltd
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Priority to NZ324834A priority Critical patent/NZ324834A/en
Priority to BR9612434-2A priority patent/BR9612434A/pt
Priority to AU12095/97A priority patent/AU722514B2/en
Priority to EA199800609A priority patent/EA002357B1/ru
Priority to IL12496996A priority patent/IL124969A/en
Priority to EP96943331A priority patent/EP0882718B1/en
Priority to JP9524201A priority patent/JP3063162B2/ja
Priority to US09/091,997 priority patent/US6166219A/en
Priority to CA002241186A priority patent/CA2241186C/en
Priority to AT96943331T priority patent/ATE303365T1/de
Priority to DE69635135T priority patent/DE69635135T2/de
Publication of WO1997024334A1 publication Critical patent/WO1997024334A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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    • C07D209/04—Indoles; Hydrogenated indoles
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    • C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
    • C07D235/06—Benzimidazoles; Hydrogenated benzimidazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2
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    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • C07D403/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/06—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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    • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • C07D417/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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    • C07D417/10—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing aromatic rings
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Definitions

  • R 9 is an alkyl group having up to 8 carbon atoms, a halo-lower alkyl group, an aryl-lower alkyl group, a hydroxy-lower alkyl group, a tri-lower-alkylsilyl-lower alkyl group.
  • You may be.
  • R 8 may be bonded to the mother nucleus via a lower alkylene group or a lower alkenylene group.
  • R 33 is a carboxyl group, a lower alkoxycarbonyl group, a (2-cyanoaryl) oxycarbonyl group, or a formula
  • Y is a carbonyl group or a lower alkylene group, and is a aryl group which may be substituted, or a lower alkyl group, an aryl group or a heterocyclic group which may be substituted with a heterocyclic group.
  • A represents a single bond or a lower alkylene group or a lower alkenylene group.
  • R 35 is a lower alkyl group
  • A means a lower alkylene group or a lower alkenylene group.
  • R 3 » are independently a hydrogen atom, a halogen atom, a lower alkyl group, a halo-lower alkyl group, an aryl group, an aryl lower alkyl group or an aryl lower alkyloxy group.
  • the compound of the formula (2) can be 1) reduced with reduced iron or zinc under acidic conditions or 2) reduced with a transition metal catalyst represented by palladium, platinum, ruthenium, nickel under a hydrogen atmosphere, or
  • the compound can be converted to the compound of formula (3) by a method such as 3) reduction with a transition metal catalyst represented by palladium, platinum, ruthenium, and nickel in the presence of formic acid, or 4) reduction with sodium hydridosulfite. 1) in the way In many cases, the compound of the formula (3) is cyclized in the reaction system to directly obtain the compound of the formula (4), and some compounds have the formula (4) ) Is formed.
  • the compound of the formula (3) can be produced from a carboxylic acid such as acetic acid, p-toluenesulfonic acid, hydrochloric acid, sulfuric acid, phosphoric acid, a sulfonic acid or an inorganic acid.
  • a carboxylic acid such as acetic acid, p-toluenesulfonic acid, hydrochloric acid, sulfuric acid, phosphoric acid, a sulfonic acid or an inorganic acid.
  • the compound of the formula (17) can be produced from the compound of the formula (16) by using a carboxylic acid such as acetic acid, p-toluenesulfonic acid, hydrochloric acid, sulfuric acid, phosphoric acid, sulfonic acid or an inorganic acid.
  • a carboxylic acid such as acetic acid, p-toluenesulfonic acid, hydrochloric acid, sulfuric acid, phosphoric acid, sulfonic acid or an inorganic acid.
  • the compound of the formula (21) is usually substituted with R 3e at the 5-position and 6-position. It is obtained as a mixture or a mixture of the 4- and 7-positions, and can be purified by means such as recrystallization, column chromatography, thin-layer chromatography, and high-performance liquid chromatography.
  • the compound of the formula (22) is 1) reduced with reduced iron or zinc under acidic conditions, or 2) a transition metal represented by palladium, platinum, ruthenium, and nickel under a hydrogen atmosphere. (3) reduction with a transition metal catalyst typified by palladium, platinum, ruthenium, and nickel in the presence of formic acid; or 4) reduction with sodium hydroxide sulfite.
  • the compound of the formula (23) is often cyclized in the reaction system to directly obtain the compound of the formula (24).
  • a compound of formula (24) is formed.
  • the compound of the formula (23) can be produced from a carboxylic acid such as acetic acid, p-toluenesulfonic acid, hydrochloric acid, sulfuric acid, phosphoric acid, a sulfonic acid or an inorganic acid.
  • the compound of the formula (24) can be converted from the formula (20) in the reaction formula (e) to the benzimidazole compound of the formula (25) by the method of the formula (21).
  • the compound of the formula (25) is usually obtained as a mixture of the 5-position and the 6-position or a mixture of the 4- and 7-positions at the R 3f substitution position. It can be purified by means such as recrystallization, column chromatography, thin layer chromatography, and high performance liquid chromatography.
  • the compound represented by the formula (30) can be produced by allowing titanium tetrachloride to act on the compound represented by the formula (29).
  • the compound of the formula (38) obtained by oxidizing the compound of the formula (34) is reacted with alkyl (triphenylphosphoranylidene) acetate to obtain the compound of the formula (39).
  • Add lithium hydroxide or sodium hydroxide Carboxylic acid of the formula (40) can be produced by hydrolysis with palladium or potassium hydroxide.
  • Further benzimidazole compounds can be produced by reacting the compound of the formula (35), (37) or (40) with an amine or a sulfonylamide.
  • R la , R 2a , and R have the same meanings as described above, and R represents R 4 , R
  • a halo-lower alkyl is a straight-chain or branched alkyl group having up to 8 carbon atoms, which is substituted by a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, and is preferably substituted by a fluorine atom, a chlorine atom and a bromine atom. It is a linear or branched alkyl group having up to 8 carbon atoms, more preferably 1 to 3 carbon atoms.
  • the tri-lower alkylsilyl lower alkyl group is a group in which a trimethylsilyl group, a triethylsilyl group, a triprobersilyl group, or the like is bonded to the lower alkyl group.
  • Lower alkylamino groups are straight-chain and branched alkylamino groups having up to 6 carbon atoms.
  • those having 1 to 4 carbon atoms for example, methylamino group, ethylamino group, n-propylamino group, i-propylamino group, n-butylamino group, i-butylamino group, sec-butylamino group , And t-butylamino group.
  • a lower alkoxycarbonyl group is a linear or branched alkyloxycarbonyl group having up to 6 carbon atoms in the alkyl portion.
  • a 7- to 12-membered, preferably 9- or 10-membered, unsaturated fused heterocyclic group (preferably a bicyclic group) having 1 to 5 nitrogen atoms, for example, indolyl, isoindolinyl, indolizinyl, benzimidazolyl, quinolyl, Isoquinolyl, indazolyl, benzotriazolyl, tetrazolopyridyl, tetrazoloviridazinyl (for example, tetrazolo [1,5-b] biridazinyl), dihydrotriazolopyridazinyl, etc .;
  • Suitable "amidated carboxy groups” include the following.
  • N-disubstituted rubamoyl in which the nitrogen atom is a member of a nitrogen-containing heterocycle (eg, morpholinocarbonyl, thiomorpholinocarbonyl, 1-perhydroazevinylcarbonyl, 1,1, dioxothiazolidine-ledulonyl, piperidino Carbonyl, 1-biperazinylcarbonyl, 4- (2-hydroxyethyl) -11-biperazinylcarbonyl, 4-methyl-11-biperazinylcarbonyl, carboxypyrrolidinocarbonyl, etc.), Substituted sulfonylcarbamoyl groups and the like.
  • a nitrogen-containing heterocycle eg, morpholinocarbonyl, thiomorpholinocarbonyl, 1-perhydroazevinylcarbonyl, 1,1, dioxothiazolidine-ledulonyl, piperidino Carbonyl, 1-biperazin
  • alkylsulfonyl Such as alkylsulfonyl, carbamoyl, N-alkylcarbamoyl (eg, methylcarbamoyl, ethylcarbamoyl, etc.), lower alkoxycarbonyl (eg, methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, butoxycalponyl, tertiary butoxycarbonyl) Etc.) such as alkoxycarbonyl, lower alkenyloxycarbonyl (eg vinyloxycarbonyl, aryl) Alkenyloxycarbonyl such as oxycarbonyl, alkenyl such as lower alkenoyl (eg, acryloyl, methacryloyl, crotonyl), cyclo (lower) alkanecarbonyl (eg cyclopropane carbonyl, cyclopentanecarbonyl, cyclohexyl). Cycloalkanecarbony
  • aromatic acyl examples include C 6—C 10 aroyl (for example, benzoyl, toluene, xyloyl, and the like), N— (C 6 -C 10) aryl rubamoyl (for example, N—phenylcarbamoyl, N— Tolyl rubamoyl, N-naphthyl carbamoyl, etc., and C6-C10 arenesulfonyl (eg, benzenesulfonyl, tosyl, etc.).
  • C 6—C 10 aroyl for example, benzoyl, toluene, xyloyl, and the like
  • N— (C 6 -C 10) aryl rubamoyl for example, N—phenylcarbamoyl, N— Tolyl rubamoyl, N-naphthyl carbamoyl, etc.
  • C6-C10 arenesulfonyl
  • the compound represented by the formula (X) include 1- (2-cyanobenzyl) -6-ethoxycarbonyl-2-I1-provenbenzimidazole and 6-ethoxycarbonyl-2-N-proville -1- (2-pyridylmethyl) benzimidazole, 6-ethoxycarbonyl-1-methyl-2-n-propylbenzimidazole, 1-n-butyl-6-ethoxycarbonyl -2-n-bromoyl Nzimidazole, 1- (biphenyl-2-ylmethyl) -6-ethoxycarbonyl-2-methylbenzimidazole, 6-ethoxycarbonyl-1- (2-methoxybenzyl) -2-methylbenzimidazole, 6 -Ethoxycarbonyl (4-methoxybenzyl) -2-methylbenzimidazole, 1- [2- (benzenesulfonylmethyl) benzyl] -6-ethoxycarbonyl-2-methylpenzimidazole, 1
  • penzimidazole derivative represented by the formula (XI II) include 1- (2-chlorobenzyl) -6-cyano-2-cyclopropylbenzimidazole and 1- (2-chlorobenzyl). ) -6-cyano-2-n- propylbenzimidazole, and the like.
  • benzimidazole derivative represented by the formula (VI) include 1- (2-chlorobenzyl) -6.
  • glycemic activity for example, glucose intolerance, diabetes (type II diabetes), diabetic complications (diabetic nephropathy). Syndrome, diabetic dementia disorder, diabetic retinopathy, etc.), insulin resistance syndrome (insulin receptor dysfunction, Rabson-Mendenhail syndrome, levulinism, Kobberling-Dunnigan syndrome, Seip syndrome, Lawrence syndrome, Cushing syndrome, Acromegaly, etc.), hyperlipidemia, atherosclerosis, cardiovascular disease (angina, heart failure, etc.), and hyperglycemia (eg, abnormal glucose metabolism such as eating disorders) ), Hypertension, and c GMP-PDE (particularly PDE-V) inhibitory action, smooth muscle relaxation action, bronchodilation action, vasodilation action, smooth muscle cell inhibitory production, allergy Production, etc., angina pectoris, hypertension, pulmonary hypertension, congestive heart failure, glomerular diseases
  • FIG. 15 is a diagram showing the chemical formulas from compound 126) to compound 131.
  • FIG. 18 is a diagram showing the chemical formulas from compound 44) to compound 149.
  • FIG. 19 shows the chemical formulas from compound 150) to compound 155.
  • FIG. 20 is a diagram showing the chemical formulas from compound 156) to compound 161.
  • FIG. 23 is a diagram showing a chemical formula from compound 174) to compound 179.
  • FIG. 26 shows the chemical formulas from compound 192) to compound 197.
  • FIG. 27 is a diagram showing the chemical formulas from compound 198) to compound 203,
  • FIG. 28 is a diagram showing the chemical formulas from compound 204) to compound 209.
  • FIG. 29 is a diagram showing a chemical formula from compound 210) to compound 215.
  • FIG. 30 shows the chemical formulas from compound 216) to compound 221.
  • FIG. 34 is a diagram showing the chemical formulas from compound 240) to compound 245,
  • FIG. 35 is a diagram showing the chemical formulas from compound 246) to compound 251.
  • FIG. 37 is a diagram showing the chemical formulas from compound 258) to compound 263,
  • FIG. 38 is a diagram showing a chemical formula from the compound (264) to the compound (269).
  • Figure 42 shows the chemical formula from compound 288) to compound (293)
  • FIG. 48 shows the chemical formulas from compound 323) to compound (328).
  • FIG. 54 is a diagram showing a chemical formula from the compound (359) to the compound (364).
  • 1,4-dioxane (30 ml) was added dropwise to a dichloromethane solution (4 ml) of titanium tetrachloride (1.70 ml), and then 3- [N- (2-cyclopentyl) acetylamino] was added.
  • a solution of 1,412-trobenzamide (2.70 g) in 1,4-dioxane (65 ml) was added dropwise. After stirring for 15 minutes, triethylamine (3.14 g) was added, and the mixture was stirred for 2 hours under ice cooling. After the completion of the reaction, the solvent was distilled off under reduced pressure, and ethyl acetate and water were added to the residue.
  • Example 6-3 1- (2,6-dichloropentyl pen) 16-ethoxycarbone Lou 2—n—Provir Benzimidazole (49) ⁇
  • 6-Carboxy 1- (2-chlorobenzyl) 12-cyclobutylvirpenzimidazole (39 Omg) is prepared by adding N, N-dimethylformamide (1 drop) to methylene chloride (10 ml). Oxalyl chloride (0.208 ml) was added dropwise to the suspension at room temperature over several minutes. After stirring at the same temperature for 2 hours, the mixture was concentrated under reduced pressure. Isopropyl ether was added to the residue to form a powder, which gave 1- (2-cyclopentyl) -16-cyclocarbene-2-cyclopropylbenzimidazol hydrochloride (60) (45 Omg). Obtained as a white powder. This product was unstable and used as a starting material for the next step without purification.
  • 6-Carboxy-11- (2-chlorobenzyl) 12_n-Propylbenzimidazole 400 mg was dissolved in methylene chloride (3 ml) to which 1 drop of N, N-dimethylformamide was added. 5. To this solution was added oxalyl chloride (28 mg). C added. After the obtained solution was stirred at room temperature for 1 hour, it was concentrated under reduced pressure. The residue was dissolved in methylene chloride (3 ml), and 4-dimethylaminobenzylamine hydrochloride (271 mg) and triethylamine (1 ml) were added to methylene chloride (10 ml). At room temperature.
  • 6-Carboxy 1- (2-chloro benzyl) 1-2-n-propylbenzimidazole (200 mg) and 4-aminomorpholine (124 mg) were obtained in the same manner as in Example 10 by the same method as in Example 10.
  • Benzyl) one 6-morpholino force rubamoyl 2 1 n-Provirbenzimidazole (62) (205 mg) was obtained.
  • Example 17-1 1- (2-cyclopentyl) -1-2-cyclobutyryl-6- (2-viridylcarbamoyl) benzimidazole (68)>
  • Example 17-5 1- (2-cyclobenzyl) -1-6- [N-methyl-N- (2-pyridylmethyl) caprolbamoyl] -1-2- ⁇ -Probylbenzimidazole (72)>
  • Example 17-8 1- (2-cyclobenzyl) _2-n-Probyl-6-[(4-Pyridylmethyl) potumbamoyl] benzimidazole (75)>
  • Example 1 7-12; 1- (3-Methylbenzyl) -1-2-n-Provyl-6-[(2-pyridylmethyl) pothamboilyl] benzimidazole (79)>
  • 6-Carboxy-11- (2-chlorobenzyl) -12-n-propylbenzimidazole 200 mg was reconstituted in t-butyl alcohol (5 ml), and diphenylphosphoryl azide (0.19 ml) was added. And diisoprovirethylamine (0.2 lml) were added at room temperature. After refluxing the reaction mixture for 4 hours, it was separated into ethyl acetate and water, and the organic layer was washed with water, dried and concentrated under reduced pressure.
  • Example 19 Synthesis of 1- (2-cyclobenzyl) -1-6-cyano 2-n-propyl penzimidazole (87)> 6- Potassium 1- (2-cyclobenzyl) 1-2-n-Provenbenzimidazole (200 mg) in tetrahydrofuran (4 ml) in 1 molar titanium tetrachloride in dichloromethane (0.14 ml) and triethyla Min (0.36 ml) was added at 0 ° C, and the mixture was stirred at 20 ° C for 2 hours. The reaction mixture was separated into ethyl acetate and water, and the organic layer was washed with water, dried, and concentrated under reduced pressure.
  • Acetic anhydride (62 mg) was added to a methylene chloride (3 ml) solution of 6-amino-11- (2-chlorobenzyl) -12-n-propylbenzimidazole (15 Omg) and triethylamine (61 mg). Then, the mixture was stirred for 1 hour, washed with water, dried and evaporated under reduced pressure. The residue was crystallized from ether to give 6-acetylamino-1- (2-chlorobenzyl) -12-n-bromobenzimidazole (89) (143 mg).
  • the reaction solution was poured into a mixed solution of dilute hydrochloric acid (80 g) and ethyl acetate (80 g) and separated, and the obtained organic layer was washed with water (50 g) and concentrated under reduced pressure.
  • Production Example 2 Production of potassium salt of N-benzenesulfonyl 3-((biphenyl-4-ylmethylamino) -41-2trobenzamide>
  • N-benzenesulfonyl 3-amino-4-12-trobenzamide (10.0 g) in methanol (150 ml) was added 203 ⁇ 4 potassium hydrogen carbonate aqueous solution (56.5 g) and 4-bromomethyl bif: nil (11.5 g). The mixture was stirred at 70 ° C for 3 hours. After cooling, the precipitated crystals were separated by filtration and dried to obtain 4.27 g of potassium salt of N-benzenesulfonyl 3- (biphenyl-2-ylmethylamino) -141-trobenzamide.
  • Oxalyl chloride (1.25 g) was added to a solution of 4-acetylamino-3-nitrobenzoic acid (l.OOg) and N, N-dimethylformamide (0.20 g) in methylene chloride (15 ml) under ice-cooling. It was dropped. The mixture was further stirred at room temperature for 1 hour. The reaction solution was concentrated, and diisopropyl ether was added for crystallization. The crystals were added to a solution of 2-aminomethylviridine (0.483 g) and triethylamine (0.35 g) in methylene chloride (15 ml).
  • N- (2-Pyridylmethyl) -14-acetylamino-3-aminobenzamide (0.80 g) in N, N-dimethylformamide (10 ml) solution 41-penzyloxybenzyl chloride (U.31 g) sodium bicarbonate (1.18 g) was added and was stirred for 2 hours at 90 e C.
  • 41-penzyloxybenzyl chloride (U.31 g) sodium bicarbonate (1.18 g) was added and was stirred for 2 hours at 90 e C.
  • To the reaction solution was added form and water, and the form was extracted with form. The organic layer was washed with water, concentrated, and purified by silica gel column chromatography to obtain 0.434 N- (2-pyridylmethyl) -1-acetylamino-3- (4-benzyloxybenzylamino) benzamide. g obtained.
  • N- (2-pyridylmethyl) 1-4-acetylamino-3-aminopenzamide (0.80 g) in N, N-dimethylformamide (10 ml)
  • 3,4-methylenedioxide chloride was added.
  • Cipendil (0.962 g) and sodium hydrogen carbonate (0.710 g) were added, and the mixture was stirred at 80 ° C for 4 hours.
  • To the reaction solution was added form and water, and the form was extracted with form.
  • N-benzenesulfonyl-4-acetylamino-3-amine was obtained from N-benzenesulfonyl-4-acetylamino-3-aminobenzamide (0.60 g) and 2-ditrobenzyl bromide (0.52 g). (2-Nitrobenzylamino) benzamide (0.79 g) was obtained.
  • N-benzenesulfonyl 4-acetylamino-3-amine was prepared from N-benzenesulfonyl 4-acetylamino-3 -aminobenzamide (0.60 g) and benzil bromide (0.47 g). Benzylaminobenzamide (0.38 g) was obtained.
  • N-benzenesulfonyl 4-acetylamino-3-aminobenzamide (0.60g ) And 2,4-difluorobenzyl bromide (0.656 g) and potassium hydrogen carbonate (0.423 g) in methanol (7 ml) were stirred at 60 ° C for 1 hour. The reaction mixture was concentrated, and the residue was purified by silica gel column chromatography (eluent: ethyl acetate / methanol 9/1) to give N-benzenesulfonyl 4-acetylamino-3- (2, 4-Difluorenediylamino) 0.370 g of penzamide was obtained.
  • N-benzenesulfonyl 4-acetylurea was obtained from N-benzenesulfonyl-4-acetylamino-13-aminopentazamide (0.50 g) and 4-trobenzyl bromide (0.436 g). Minnow 3- (4-nitrobenzylamino) benzamide (0.52 g) was obtained.
  • Acetyl chloride (13 ml) was added dropwise to a solution of ethyl 3-amino-2-nitrobenzoate (2.98 g) and N, N-dimethylaniline (20 ml) in an ice bath. Stirred at room temperature for 48 hours.
  • the reaction solution was acidified with 103 ⁇ 4 hydrochloric acid, extracted with ethyl acetate (twice), and the organic layer was washed with water (three times).
  • Hexane was added to the residue obtained by evaporating the solvent under reduced pressure to cause crystallization. The crystals were washed with hexane, washed with hexane, and dried to obtain 3.30 g of ethyl 3-benzoylamino-2-benzoate.
  • Example 40 Synthesis of 1-benzyl-6-ethoxycarbonyl 2-methylbenzimidazole (108)> According to the method of Production Example 14, 3-acetylamino-4-ethyl benzoate (1.OOg) and benzyl benzyl (1.02 g) were converted to 3- (N-benzylacetylamino). The ethyl benzoate was obtained. This was converted to 1-benzyl-6-ethoxycarbonyl 2-methylbenzimidazole (108) (0.71 g) by the method of Example 24 without purification.
  • 6-ethoxycarbone-2-n-pro-I-I-propyl-benzimidazole (0.045 g) was converted to 6-carboxy-2-n-propyl-1-1-i-i-propyl-benzimidazole (119) (0.045 g) was obtained.
  • Example 49 1-n-butyl-6-ethoxycarponyl-2-n-pro-bilbenzimidazole (0.81 g) was used to prepare 11-n-butyl-6-carboxy-2-n-butyl bilupenzimi. Dazole (120) (0.60 g) was obtained.
  • Example 53 Synthesis of 6-carboxy-11- (2-cyclobenzyl) -12-methylbenzimidazole (121)> Ethanol (80 ml) and a 10% aqueous solution of sodium hydroxide (37 g) were added to 1- (2-cyclopentyl) -1-6-ethoxycarbonyl-2-methylpenzimidazole (10.Og), and the mixture was refluxed for 4 hours. After cooling the reaction solution, it was adjusted to pH 6 with 103 ⁇ 4 hydrochloric acid. The precipitate was collected, washed with water, and dried under reduced pressure to obtain 6-carboxy-11- (2-chlorobenzene) -12-methylbenzimidazole (122) (8.30 g).
  • Example 56 Synthesis of 6-Carboxy-2-methyl-11- [41- (trifluoromethyl) pentyl] penzimidazole (124)> According to the method of Example 53, 6-ethoxycarbonyl 2-methyl: I- [4- (trifluoromethyl) benzyl] penzimidazole (1.22 g) was prepared from 6-carboxy-12-methyl-11- [4- (trifluoro) Romethyl) benzyl] benzimidazole
  • Example 58 1- (3-chlorobenzyl) -1 6-ethoxycarbonyl-2-n-propylbenzimidazole (0.57 g) was converted to 6-carboxy-11- (3-chlorobenzyl) 12- n-Provirbenz imidazole (127) (0.35 g) was obtained.
  • Example 5 According to the method of 3, 1- (2-cyanobenzyl) -16- (2-cyanobenzyloxycarbonyl) 1-2-methylbenzimidazole (2.04 g) was converted to 6-carboxy. There was obtained 1,1- (2-cyanobenzyl) -12-methylbenzimidazole (136) (1.14 g).
  • Example 5 According to the method of 3, 1- (biphenyl-2-ylmethyl) -1-6-ethoxycarbonyl 2-methylbenzimidazole (1.31 g) to 6-carboxy-11- (biphenyl-2-ylmethyl) One-methylbenzimidazole (137) (1.07 g) was obtained.
  • Manganese dioxide (3.46 g) was added to a solution of 1- (2-cyclobenzyl) -1-6-hydroxymethyl-2-methylbenzimidazole (3.46 g) in toluene (100 ml), and the mixture was dehydrated with a molecular sieve 4A. The toluene was heated to reflux for hours. The solid was separated by filtration and washed with black-mouthed form. The filtrate was concentrated to give 3.35 g of 1- (2-cyclobenzyl) -6-formyl-12-methylbenzimidazole.

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JP2000159749A (ja) 2000-06-13
EP0882718A1 (en) 1998-12-09
HUP9900625A3 (en) 2003-04-28
EA199800609A1 (ru) 1999-02-25
IL124969A0 (en) 1999-01-26
DE69635135D1 (en) 2005-10-06
TR199801249T2 (xx) 1998-10-21
BR9612434A (pt) 1999-12-28
ATE303365T1 (de) 2005-09-15
US6166219A (en) 2000-12-26
HUP9900625A2 (hu) 1999-06-28
DK0882718T3 (da) 2005-12-12
JP3063162B2 (ja) 2000-07-12
NZ324834A (en) 2001-11-30
DE69635135T2 (de) 2006-07-06
EA002357B1 (ru) 2002-04-25
US6352985B1 (en) 2002-03-05
IL124969A (en) 2002-09-12
ES2244979T3 (es) 2005-12-16
EP0882718A4 (en) 1999-08-04
AU722514B2 (en) 2000-08-03
CN1211238A (zh) 1999-03-17
AU1209597A (en) 1997-07-28

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