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【结 构 式】

【分子编号】14153

【品名】4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene

【CA登记号】350-46-9

【 分 子 式 】C6H4FNO2

【 分 子 量 】141.1017032

【元素组成】C 51.07% H 2.86% F 13.46% N 9.93% O 22.68%

与该中间体有关的原料药合成路线共 8 条

合成路线1

该中间体在本合成路线中的序号:(IV)

Reaction of 1-methyl-4-piperidone (I) with phenyllithium (II) gives 1-methyl-4-phenyl-4-piperidinol (III), which is alkylated with (IV) in NaH/DMF to yield (V), followed by reduction with hydrazine/Raney-Ni.

1 Eistetter, K.; Kley, H.-P.; Menge, H.G.; Schaefer, H. (Byk Gulden Lomberg Chemische Fabrik GmbH); Anti-depressant and analgesic 4-phenoxypiperidines. US 4333942 .
2 Menge, H.G.; Eistetter, K.; Schaefer, H.; Kley, H.-P.; B-777-81. Drugs Fut 1983, 8, 5, 387.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 10919 1-Methyl-4-piperidone; 1-Methyltetrahydro-4(1H)-pyridinone; N-Methyl-4-piperidone;1-methylpiperidin-4-one 1445-73-4 C6H11NO 详情 详情
(II) 24014 Phenyllithium 591-51-5 C6H5Li 详情 详情
(III) 24016 1-methyl-4-phenyl-4-piperidinol C12H17NO 详情 详情
(IV) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(V) 36052 1-methyl-4-phenyl-4-piperidinyl 4-nitrophenyl ether; 1-methyl-4-(4-nitrophenoxy)-4-phenylpiperidine C18H20N2O3 详情 详情

合成路线2

该中间体在本合成路线中的序号:(V)

The synthesis of metabolites M-III, M-IV and M-V of pioglitazone has been reported: a) Synthesis of metabolite M-IV: The reduction of 5-acetyl-2-methylpyridine (I) with NaBH4 in cooled ethanol gives the corresponding 1-hydroxyethyl derivative (II), which is protected with chloromethyl methyl ether and NaH in DMF yielding the methoxymethyl ether (III). The hydroxymethylation of (III) with aqueous formaldehyde at 150-60 C affords the ethanol (IV), which is condensed with 4-fluoronitrobenzene (V) by means of NaH in cooled DMF giving 5-[1-(methoxymethoxy)ethyl]-2-[2-(4-nitrophenoxy)ethyl]pyridine (VI). The reduction of the nitro group of (VI) with H2 over Pd/C in ethyl acetate yields the corresponding amino compound (VII), which is diazotized with NaNO2 in aqueous HBr and condensed with methyl acrylate (VIII) by means of Cu2O to afford the 2-bromopropionate derivative (IX). The cyclization of (IX) with thiourea (X) by means of sodium acetate in refluxing ethanol gives the intermediate iminothiazolidinone (XI), which without isolation, is treated with refluxing 2N HCl to give metabolite M-IV. b) Synthesis of metabolite M-III: By oxidation of metabolite M-IV with the pyridine.sulfur trioxide complex in ethanol/dichloromethane/triethylamine

1 Momose, Y.; Sohda, T.; Meguro, K.; Hatanaka, C.; Ikeda, H.; Oi, S.; Studies on antidiabetic agents: Synthesis and biological activities of pioglitazone and related compounds. 11th Symp Med Chem (Dec 4-5, Tokushima) 1990, Abst P-11.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
M-IV 63861 5-(4-{2-[5-(1-hydroxyethyl)-2-pyridinyl]ethoxy}benzyl)-1,3-thiazolidine-2,4-dione C19H20N2O4S 详情 详情
M-III 63862 5-{4-[2-(5-acetyl-2-piperidinyl)ethoxy]benzyl}-1,3-thiazolidine-2,4-dione C19H24N2O4S 详情 详情
(I) 14149 1-(6-Methyl-3-pyridinyl)-1-ethanone C8H9NO 详情 详情
(II) 14150 1-(6-Methyl-3-pyridinyl)-1-ethanol C8H11NO 详情 详情
(III) 14151 5-[1-(Methoxymethoxy)ethyl]-2-methylpyridine; Methoxymethyl 1-(6-methyl-3-pyridinyl)ethyl ether C10H15NO2 详情 详情
(IV) 14152 2-[5-[1-(Methoxymethoxy)ethyl]-2-pyridinyl]-1-ethanol C11H17NO3 详情 详情
(V) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(VI) 14154 2-[5-[1-(Methoxymethoxy)ethyl]-2-pyridinyl]ethyl 4-nitrophenyl ether; 5-[1-(Methoxymethoxy)ethyl]-2-[2-(4-nitrophenoxy)ethyl]pyridine C17H20N2O5 详情 详情
(VII) 14155 4-(2-[5-[1-(Methoxymethoxy)ethyl]-2-pyridinyl]ethoxy)aniline; 4-(2-[5-[1-(Methoxymethoxy)ethyl]-2-pyridinyl]ethoxy)phenylamine C17H22N2O3 详情 详情
(VIII) 14156 methyl acrylate 96-33-3 C4H6O2 详情 详情
(IX) 14157 methyl 2-bromo-3-[4-(2-[5-[1-(methoxymethoxy)ethyl]-2-pyridinyl]ethoxy)phenyl]propanoate C21H26BrNO5 详情 详情
(X) 10180 Thiourea 62-56-6 CH4N2S 详情 详情
(XI) 14159 2-Imino-5-[4-(2-[5-[1-(methoxymethoxy)ethyl]-2-pyridinyl]ethoxy)benzyl]-1,3-thiazolan-4-one C21H25N3O4S 详情 详情

合成路线3

该中间体在本合成路线中的序号:(V)

c) Synthesis of metabolite M-V: The reduction of 6-methylpyridine-3-carboxylic acid methyl ester (XII) with LiAlH4 in THF gives the corresponding hydroxymethyl derivative (XIII), which is protected with chloromethyl methyl ether as before yielding the methoxymethoxymethyl compound (XIV). Hydroxymethylation of (XIV) with formaldehyde as described affords the ethanol derivative (XV), which is condensed with 4-fluoronitrobenzene (V) as before giving 5-(hydroxymethyl)-2-[2-(4-nitrophenoxy)ethyl]pyridine (XVI). The deprotection of (XVI) with HCl in refluxing methanol yields the hydroxymethyl compound (XVII), which is treated with SOCl2 in refluxing chloroform to afford the chloromethyl compound (XVIII). The reaction of (XVIII) with KCN in hot DMF gives the corresponding cyanomethyl derivative (XIX), which by reduction of the NO2 group with H2 over Pd/C in ethyl acetate yields the amino derivative (XX). The diazotation of (XX) with NaNO2 in aqueous HBr followed by condensation with methyl acrylate as before affords the 2-bromopropionate (XXI), which is cyclized with thiourea (X) as reported to give iminothiazolidinone derivative (XXII). Finally, the hydrolysis of the cyano gives Metabolite M-V.

1 Momose, Y.; Sohda, T.; Meguro, K.; Hatanaka, C.; Ikeda, H.; Oi, S.; Studies on antidiabetic agents: Synthesis and biological activities of pioglitazone and related compounds. 11th Symp Med Chem (Dec 4-5, Tokushima) 1990, Abst P-11.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
M-V 63863 2-[6-(2-{4-[(2,4-dioxo-1,3-thiazolidin-5-yl)methyl]phenoxy}ethyl)-3-pyridinyl]acetic acid C19H18N2O5S 详情 详情
(V) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(VIII) 14156 methyl acrylate 96-33-3 C4H6O2 详情 详情
(X) 10180 Thiourea 62-56-6 CH4N2S 详情 详情
(XII) 14160 methyl 6-methylnicotinate 5470-70-2 C8H9NO2 详情 详情
(XIII) 14161 (6-Methyl-3-pyridinyl)methanol C7H9NO 详情 详情
(XIV) 14162 Methoxymethyl (6-methyl-3-pyridinyl)methyl ether; 5-[(Methoxymethoxy)methyl]-2-methylpyridine C9H13NO2 详情 详情
(XV) 14163 2-[5-[(Methoxymethoxy)methyl]-2-pyridinyl]-1-ethanol C10H15NO3 详情 详情
(XVI) 14164 5-[(Methoxymethoxy)methyl]-2-[2-(4-nitrophenoxy)ethyl]pyridine; 2-[5-[(Methoxymethoxy)methyl]-2-pyridinyl]ethyl 4-nitrophenyl ether C16H18N2O5 详情 详情
(XVII) 14165 [6-[2-(4-Nitrophenoxy)ethyl]-3-pyridinyl]methanol C14H14N2O4 详情 详情
(XVIII) 14166 2-[5-(Chloromethyl)-2-pyridinyl]ethyl 4-nitrophenyl ether; 5-(Chloromethyl)-2-[2-(4-nitrophenoxy)ethyl]pyridine C14H13ClN2O3 详情 详情
(XIX) 14167 2-[6-[2-(4-Nitrophenoxy)ethyl]-3-pyridinyl]acetonitrile C15H13N3O3 详情 详情
(XX) 14168 2-[6-[2-(4-Aminophenoxy)ethyl]-3-pyridinyl]acetonitrile C15H15N3O 详情 详情
(XXI) 14169 methyl 2-bromo-3-(4-[2-[5-(cyanomethyl)-2-pyridinyl]ethoxy]phenyl)propanoate C19H19BrN2O3 详情 详情
(XXII) 14170 2-[6-(2-[4-[(2-Imino-4-oxo-1,3-thiazolan-5-yl)methyl]phenoxy]ethyl)-3-pyridinyl]acetonitrile C19H18N4O2S 详情 详情

合成路线4

该中间体在本合成路线中的序号:(II)

The condensation of 2-(5-ethyl-2-pyridyl)ethanol (I) with 4-fluoronitrobenzene (II) by means of NaH in DMF gives 4-[2-(5-ethyl-2-pyridyl)ethoxy]nitrobenzene (III), which is reduced with H2 over Pd/C in methanol to yield the corresponding aniline (IV). The reaction of (IV) with NaNO2/HBr and methyl acrylate (V) in acetone/methanol affords the 2-bromopropionate derivative (VI), which is cyclized with thiourea (VII) by means of NaOAc in refluxing ethanol to provide the 2-imino-4-thiazolidinone (VIII). Finally, this compound is hydrolyzed with refluxing 2N HCl.

1 Meguro, K.; Fujita, T. (Takeda Chemical Industries, Ltd.); Thiazolidinedione derivs., their production and use. EP 0193256; ES 8705886; JP 1986267580; US 4687777 .
2 Sohda, T.; Momose, Y.; Meguro, K.; Kawamatsu, Y.; Sugiyama, Y.; Ikeda, H.; Studies on antidiabetic agents. Synthesis and hypoglycemic activity of 5-[4-(pyridylalkoxy)benzyl]-2,4-thiazolidinediones. Arzneim-Forsch Drug Res 1990, 40, 1, 37.
3 Prous, J.; Castaner, J.; PIOGLITAZONE HYDROCHLORIDE < Prop INNM; USAN >. Drugs Fut 1990, 15, 11, 1080.
4 Meguro, K.; Momose, Y.; Sohda, T.; Oi, S.; Ikeda, H.; Hatanaka, C.; Studies on antidiabetic agents. X. Synthesis and biological activities of pioglitazone and related compounds. Chem Pharm Bull 1991, 39, 6, 1440-5.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 14139 2-(5-Ethyl-2-pyridinyl)-1-ethanol 5223-06-3 C9H13NO 详情 详情
(II) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(III) 62867 5-ethyl-2-[2-(4-nitrophenoxy)ethyl]pyridine; 2-(5-ethyl-2-pyridinyl)ethyl 4-nitrophenyl ether C15H16N2O3 详情 详情
(IV) 62868 4-[2-(5-ethyl-2-pyridinyl)ethoxy]aniline; 4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenylamine C15H18N2O 详情 详情
(V) 14156 methyl acrylate 96-33-3 C4H6O2 详情 详情
(VI) 62869 methyl 2-bromo-3-{4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenyl}propanoate C19H22BrNO3 详情 详情
(VII) 10180 Thiourea 62-56-6 CH4N2S 详情 详情
(VIII) 62870 5-{4-[2-(5-ethyl-2-pyridinyl)ethoxy]benzyl}-2-imino-1,3-thiazolidin-4-one C19H21N3O2S 详情 详情

合成路线5

该中间体在本合成路线中的序号:(II)

The condensation of mercapto benzothiazole (I) with 4-fluoronitrobenzene (II) afforded the 4-nitrophenyl thioether (III). After reduction of the nitro group of (III) with iron in HOAc, the resulting aniline (IV) was acylated with the dichloroisatoic anhydride (V) to produce the anthranylamide (VI). This was finally condensed with 3,5-dichloro-2-hydroxybenzenesulfonyl chloride (VII) to yield the corresponding sulfonamide.

1 Dumas, J.; Witowsky, J.; Hatoum-Mokdad, H.; Sibley, R.; Chen, J.; Dixon, B.; Wong, S.; Konig, G.; Britelli, D.; Synthesis and structure activity relationships of novel small molecule cathepsin D inhibitors. Bioorg Med Chem Lett 1999, 9, 17, 2531.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 34296 6-ethoxy-1,3-benzothiazol-2-ylhydrosulfide; 6-ethoxy-1,3-benzothiazole-2-thiol 120-53-6 C9H9NOS2 详情 详情
(II) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(III) 46843 6-ethoxy-2-[(4-nitrophenyl)sulfanyl]-1,3-benzothiazole; ethyl 2-[(4-nitrophenyl)sulfanyl]-1,3-benzothiazol-6-yl ether C15H12N2O3S2 详情 详情
(IV) 46844 4-[(6-ethoxy-1,3-benzothiazol-2-yl)sulfanyl]aniline; 4-[(6-ethoxy-1,3-benzothiazol-2-yl)sulfanyl]phenylamine C15H14N2OS2 详情 详情
(V) 46845 3,5-Dichloroisatoic anhydride; 6,8-dichloro-2H-3,1-benzoxazine-2,4(1H)-dione 4693-00-9 C8H3Cl2NO3 详情 详情
(VI) 46846 2-amino-3,5-dichloro-N-[4-[(6-ethoxy-1,3-benzothiazol-2-yl)sulfanyl]phenyl]benzamide C22H17Cl2N3O2S2 详情 详情
(VII) 46847 3,5-dichloro-2-hydroxybenzenesulfonyl chloride 23378-88-3 C6H3Cl3O3S 详情 详情

合成路线6

该中间体在本合成路线中的序号:(I)

The condensation between 4-fluoronitrobenzene (I) and tetrazole (II) provided a mixture of regioisomeric (4-nitrophenyl)tetrazoles (III) and (IV). Reduction of this mixture employing hydrazine and FeCl3 gave the corresponding mixture of amino derivatives from which the required isomer (V) was isolated by column chromatography. Alternatively, 4-nitroaniline (VI) was converted into the desired (4-nitrophenyl)tetrazole regioisomer (III) by reaction with sodium azide and trimethyl orthoformate in HOAc. Subsequent reduction of the nitro group of (III) employing hydrazine and FeCl3 gave aniline (V). This compound was also obtained by another alternative procedure consisting in protection of 4-nitroaniline (VI) as the N,N-dibenzyl amine (VII), followed by reduction of the nitro group and cyclization with NaN3 and trimethyl orthoformate to afford tetrazole (VIII). Further hydrogenolysis of the benzyl protecting groups of (VIII) yielded 1-(4-aminophenyl)tetrazole (V). Aniline (V) was then converted to the intermediate phenyl carbamate (IX) by treatment with phenyl chloroformate in pyridine. Optionally, the intermediate phenyl carbamate (IX) was converted into the aryl imidazolone (XII) by condensation with 2,2-diethoxyethylamine (X) and then acid-catalyzed cyclization of the resulting N-(2,2-diethoxyethyl)urea (XI) to give (XII).

4 Itoh, K.; Okonogi, K.; Tasaka, A. (Takeda Chemical Industries, Ltd.); Azole cpds., their production and use. EP 0809640; JP 1997183769; WO 9625410 .
5 Kitazaki, T.; Matsushita, Y.; Hosono, H.; Itoh, K.; Mitsudera, H. (Takeda Chemical Industries, Ltd.); Triazole derivs. and their production. EP 0884311 .
1 Ichikawa, T.; Matsushita, Y.; Yamada, M.; Tasaka, A.; Yamaguchi, M.; Itoh, K.; Okonogi, K.; Kitazaki, T.; TAK-456 and the water-soluble prodrug TAK-457, new antifungal triazoles: Synthesis and in vitro antifungal activity. 40th Intersci Conf Antimicrob Agents Chemother (Sept 17 2000, Toronto) 2000, Abst F-1085.
2 Ichikawa, T.; et al.; Optically active antifungal azoles. XI. An alternative synthetic route for 1-[(1R,2R)-2-(2,4-difluorophenyl)-2-hydroxy-1-methyl-3-(1H-1,2,4-triazol-1-yl)propyl]-3-[4-(1H-1-tetrazolyl)phenyl]-2-imidazolidinone (TAK-456) and its analog. Chem Pharm Bull 2000, 48, 12, 1947.
3 Hosono, H.; Itoh, K.; Kitazaki, T.; Ichikawa, T.; Okonogi, K.; Tasaka, A.; Matsushita, Y.; Hayashi, R.; Optically active antifungal azoles. X. Synthesis and antifungal activity of N-[4-(azolyl)phenyl] and N-[4-(azolylmethyl)phenyl]-N'[(1R,2R)-2-(2,4-difluorophenyl)-2-hydroxy-1-methyl-3-(1H,1,2,4-triazol-1-yl)propyl]-azolones. Chem Pharm Bull 2000, 48, 12, 1935.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(II) 32408 1H-1,2,3,4-tetraazole; Tetrazole 288-94-8 CH2N4 详情 详情
(III) 45555 1-(4-nitrophenyl)-1H-1,2,3,4-tetraazole C7H5N5O2 详情 详情
(IV) 45556 2-(4-nitrophenyl)-2H-1,2,3,4-tetraazole 67-97-0 C7H5N5O2 详情 详情
(V) 45557 4-(1H-1,2,3,4-tetraazol-1-yl)phenylamine; 4-(1H-1,2,3,4-tetraazol-1-yl)aniline C7H7N5 详情 详情
(VI) 15547 4-nitrophenylamine; p-Nitroaniline; 4-nitroaniline 100-01-6 C6H6N2O2 详情 详情
(VII) 45558 N,N-dibenzyl-N-(4-nitrophenyl)amine; N,N-dibenzyl-4-nitroaniline C20H18N2O2 详情 详情
(VIII) 45559 N,N-dibenzyl-N-[4-(1H-1,2,3,4-tetraazol-1-yl)phenyl]amine; N,N-dibenzyl-4-(1H-1,2,3,4-tetraazol-1-yl)aniline C21H19N5 详情 详情
(IX) 45560 phenyl 4-(1H-1,2,3,4-tetraazol-1-yl)phenylcarbamate C14H11N5O2 详情 详情
(X) 10331 2,2-Diethoxy-1-ethanamine; 2,2-Diethoxyethylamine; Aminoacetaldehyde diethyl acetal 645-36-3 C6H15NO2 详情 详情
(XI) 45561 N-(2,2-diethoxyethyl)-N'-[4-(1H-1,2,3,4-tetraazol-1-yl)phenyl]urea C14H20N6O3 详情 详情
(XII) 45562 1-[4-(1H-1,2,3,4-tetraazol-1-yl)phenyl]-1,3-dihydro-2H-imidazol-2-one C10H8N6O 详情 详情

合成路线7

该中间体在本合成路线中的序号:(II)

The reaction of the sodium salt of 2-methyl-4-nitroimidazole (I) with 4-fluoronitrobenzol (II) gives nitrefazole.

1 Castaner, J.; Prous, J.R.; Nitrefazole. Drugs Fut 1983, 8, 10, 861.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 60565   C3H2N3NaO2 详情 详情
(II) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情

合成路线8

该中间体在本合成路线中的序号:(IV)

In an alternative method, p-nitroaniline (I) is reacted with ethylene oxide (II) to afford diol (III). This compound can also be prepared by condensation of 1-fluoro-4-nitrobenzene (IV) with diethanolamine (V). Chlorination of diol (III) to provide (VI) is accomplished with either mesyl chloride or SOCl2 in the presence of pyridine. Then, nitro group reduction in (VI) by means of iron and HCl affords aniline (VII).

1 Jordan, A.M.; Khan, T.H.; Malkin, H.; Osborn, H.M.I.; Synthesis and analysis of urea and carbamate prodrugs as candidates for melanocyte-directed enzyme prodrug therapy (MDEPT). Bioorg Med Chem 2002, 10, 8, 2625.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 15547 4-nitrophenylamine; p-Nitroaniline; 4-nitroaniline 100-01-6 C6H6N2O2 详情 详情
(II) 10393 Oxirane; Ethylene oxide 75-21-8 C2H4O 详情 详情
(III) 64080 2-[(2-hydroxyethyl)-4-nitroanilino]-1-ethanol C10H14N2O4 详情 详情
(IV) 14153 4-Fluoronitrobenzene; 1-Fluoro-4-nitrobenzene 350-46-9 C6H4FNO2 详情 详情
(V) 24273 2-[(2-hydroxyethyl)amino]-1-ethanol 111-42-2 C4H11NO2 详情 详情
(VI) 64081 N,N-bis(2-chloroethyl)-4-nitroaniline; N,N-bis(2-chloroethyl)-N-(4-nitrophenyl)amine C10H12Cl2N2O2 详情 详情
(VII) 64082 N~1~,N~1~-bis(2-chloroethyl)-1,4-benzenediamine; N-(4-aminophenyl)-N,N-bis(2-chloroethyl)amine C10H14Cl2N2 详情 详情
Extended Information