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【结 构 式】 
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【分子编号】21085 【品名】3-methoxy-4-nitrobenzoic acid；4-Nitro-3-methoxybenzoic acid 【CA登记号】5081-36-7 |
【 分 子 式 】C8H7NO5 【 分 子 量 】197.14732 【元素组成】C 48.74% H 3.58% N 7.1% O 40.58% |
合成路线1
该中间体在本合成路线中的序号：(V)Title compound has been obtained by two synthetic procedures: 1) Pyrrole-2-carbaldehyde (I) was alkylated with 2-nitrobenzyl bromide (II) in the presence of NaH to afford the N-nitrobenzyl pyrrole (III). Then, reductive cyclization over Pd/C produced the pyrrolobenzodiazepine (IV). Subsequent condensation of (IV) with acid chloride (VI), prepared from 3-methoxy-4-nitrobenzoic acid (V) and oxalyl chloride, gave benzamide (VII). The nitro group of (VII) was then reduced by catalytic hydrogenation over Pd/C, and the resulting amine (VIII) was further acylated with biphenyl-2-carbonyl chloride (IX) in the presence of diisopropyl ethylamine (DIEA) to yield diamide (X). Finally, the Mannich reaction with tetramethyl diaminomethane and paraformaldehyde introduced the (dimethylamino)methyl group into the pyrrole nucleus. 2) In a related procedure, 3-methoxy-4-nitrobenzoic acid (V) was esterified with MeOH in the presence of SOCl2. The nitrobenzoic ester (XI) was reduced to aminoester (XII) by hydrogenation over Pd/C, and then acylated with biphenyl-2-carbonyl chloride (IX) and DIEA to produce amide (XIII). Subsequent saponification of the ester function of (XIII), followed by treatment with oxalyl chloride furnished acid chloride (XIV), which was then condensed with the tricyclic intermediate (IV) to yield diamide (X). Finally, the (dimethylamino)methyl group was introduced, as before, by means of a Mannich reaction.
| 【1】 Ashwell, M.A.; et al.; The design, synthesis and physicochemical properties of a novel series of human vasopressin-V2 receptor antagonists. 216th ACS Natl Meet (Aug. 23-27, Boston) 1998, Abst MEDI 061. |
| 【2】 Bagli, J.F.; Ashwell, M.A.; Caggiano, T.J.; et al.; The design, synthesis and physical chemical properties of novel human vasopressin V2-receptor antagonists optimized for parenteral delivery. Bioorg Med Chem Lett 2000, 10, 8, 783. |
| 【3】 Albright, J.D.; Venkatesan, A.M.; Dusza, J.P.; Sum, F.-W. (American Cyanamid Co.); Tricyclic benzazepine vasopressin antagonists. JP 2000510154; US 5753648; WO 9749707 . |
| 【4】 Albright, J.D.; Venkatesan, A.M.; Dusza, J.P.; Sum, F.W. (American Cyanamid Co.); Tricyclic benzazepine vasopressin antagonists. US 5700796; WO 9749708 . |
| 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) | 21081 | Pyrrole-2-carbaldehyde; 1H-pyrrole-2-carbaldehyde | 1003-29-8 | C5H5NO | 详情 | 详情 |
| (II) | 21082 | 1-(bromomethyl)-2-nitrobenzene；2-Nitrobenzyl bromide;alpha-Bromo-2-nitrotoluene | 3958-60-9 | C7H6BrNO2 | 详情 | 详情 |
| (III) | 21083 | 1-(2-nitrobenzyl)-1H-pyrrole-2-carbaldehyde; N-(2-Nitrobenzyl)pyrrole-2-carboxaldehyde | 22162-51-2 | C12H10N2O3 | 详情 | 详情 |
| (IV) | 21084 | 10,11-dihydro-5H-pyrrolo[2,1-c][1,4]benzodiazepine | 22162-53-4 | C12H12N2 | 详情 | 详情 |
| (V) | 21085 | 3-methoxy-4-nitrobenzoic acid；4-Nitro-3-methoxybenzoic acid | 5081-36-7 | C8H7NO5 | 详情 | 详情 |
| (VI) | 21086 | 3-methoxy-4-nitrobenzoyl chloride | C8H6ClNO4 | 详情 | 详情 | |
| (VII) | 21087 | (3-methoxy-4-nitrophenyl)[5H-pyrrolo[2,1-c][1,4]benzodiazepin-10(11H)-yl]methanone | C20H17N3O4 | 详情 | 详情 | |
| (VIII) | 21088 | (4-amino-3-methoxyphenyl)[5H-pyrrolo[2,1-c][1,4]benzodiazepin-10(11H)-yl]methanone | C20H19N3O2 | 详情 | 详情 | |
| (IX) | 18506 | [1,1'-biphenyl]-2-carbonyl chloride | C13H9ClO | 详情 | 详情 | |
| (X) | 21090 | N-[2-methoxy-4-[5H-pyrrolo[2,1-c][1,4]benzodiazepin-10(11H)-ylcarbonyl]phenyl][1,1'-biphenyl]-2-carboxamide | C33H27N3O3 | 详情 | 详情 | |
| (XI) | 21091 | methyl 3-methoxy-4-nitrobenzoate | 5081-37-8 | C9H9NO5 | 详情 | 详情 |
| (XII) | 21092 | methyl 4-amino-3-methoxybenzoate | 41608-64-4 | C9H11NO3 | 详情 | 详情 |
| (XIII) | 21093 | methyl 4-[([1,1'-biphenyl]-2-ylcarbonyl)amino]-3-methoxybenzoate | C22H19NO4 | 详情 | 详情 | |
| (XIV) | 21094 | 4-[([1,1'-biphenyl]-2-ylcarbonyl)amino]-3-methoxybenzoyl chloride | C21H16ClNO3 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(VII)The reduction of 3,4-dinitrobenzoic acid amide (I) with H2 over Pd/C in methanol gives 3,4-diaminobenzoic acid (II), which is cyclized with 3-ethoxy-3-iminopropionic acid ethyl ester (IV) (obtained by reaction of cyanacetic acid ethyl ester (III) with ethanolic HCl) in hot acetic acid to yield 2-(5-carbamoyl-1H-benzimidazol-2-yl)acetic acid ethyl ester (V). The reaction of 3-methoxy-4-nitrobenzoic acid (VII) with aqueous methylamine in a sealed tube at 100 C gives 3-(methylamino)-4-nitrobenzoic acid (VIII), which is reduced with H2 over Pd/C in methanol/THF to yield 4-amino-3-(methylamino)benzoic acid (VI). The cyclization of (VI) with (V) by means of 1,3-dimethylperhydropyrimidin-2-one (DMPU) at 190 C affords the substituted bis-benzimidazolylmethyl (IX). The reaction of (IX) with 2-amino-3-phosponopropionic acid tris-trimethylsilyl ester (X) (prepared by esterification of 2-amino-3-phosphonopropionic acid (XI) with N-methyl-N-(trimethylsilyl)trifluoroacetamide (XII)) by means of (PyBroP) in DMF provides the carboxamide (XIII). Finally, the cleavage of the trimethylsilyl ester groups by means of TFA furnishes the target phosphonic acid.
| 【1】 Rice, K.; Wang, V.R.; Hataye, J.M.; Shelton, E.J.; Spender, J.R. (Celera Genomics); Novel cpds. and compsns. for treating hepatitis C infections. WO 0020400 . |
| 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) | 55559 | 3,4-dinitrobenzamide | C7H5N3O5 | 详情 | 详情 | |
| (II) | 55560 | 3,4-diaminobenzamide | C7H9N3O | 详情 | 详情 | |
| (III) | 11877 | Cyanoacetic acid ethyl ester; Ethyl 2-cyanoacetate; Ethyl cyanoacetate; Ethyl isocyanacetate | 105-56-6 | C5H7NO2 | 详情 | 详情 |
| (IV) | 17929 | ethyl 3-ethoxy-3-iminopropanoate | 2318-25-4 | C7H13NO3 | 详情 | 详情 |
| (V) | 55561 | ethyl 2-[5-(aminocarbonyl)-1H-benzimidazol-2-yl]acetate | C12H13N3O3 | 详情 | 详情 | |
| (VI) | 14729 | 4-amino-3-(methylamino)benzoic acid | C8H10N2O2 | 详情 | 详情 | |
| (VII) | 21085 | 3-methoxy-4-nitrobenzoic acid；4-Nitro-3-methoxybenzoic acid | 5081-36-7 | C8H7NO5 | 详情 | 详情 |
| (VIII) | 14728 | 3-(methylamino)-4-nitrobenzoic acid | C8H8N2O4 | 详情 | 详情 | |
| (IX) | 55562 | 2-{[5-(aminocarbonyl)-1H-benzimidazol-2-yl]methyl}-1-methyl-1H-benzimidazole-6-carboxylic acid | C18H15N5O3 | 详情 | 详情 | |
| (X) | 55563 | 3-{bis[(trimethylsilyl)oxy]phosphoryl}alanine | C9H24NO5PSi2 | 详情 | 详情 | |
| (XI) | 55565 | DL-2-Amino-3-phosphonopropionic acid; 2-Amino-3-phosphonopropionic acid | 20263-06-3 | C3H8NO5P | 详情 | 详情 |
| (XII) | 21859 | 2,2,2-trifluoro-N-methyl-N-(trimethylsilyl)acetamide | C6H12F3NOSi | 详情 | 详情 | |
| (XIII) | 55564 | N-[(2-{[5-(aminocarbonyl)-1H-benzimidazol-2-yl]methyl}-1-methyl-1H-benzimidazol-6-yl)carbonyl]-3-{bis[(trimethylsilyl)oxy]phosphoryl}alanine | C27H37N6O7PSi2 | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号：(I)3-Methoxy-4-nitrobenzoic acid (I) is chlorinated using SOCl2 in the presence of DMF or pyridine in refluxing toluene to yield the benzoyl chloride (II) , which is then coupled with trans-4-aminocyclohexanol (III) by means of K2CO3 in THF to provide amide (IV). Subsequent oxidation of the secondary alcohol group in compound (IV) by means of RuCl3 and NMMO in refluxing acetonitrite leads to the cyclohexanone (V), which, after condensation with N-(cyclopropylmethyl)piperazine (VI) in the presence of MsOH in refluxing toluene, is reduced to the cyclohexyl piperazine (VII) using NaBH4 in EtOH (1, 2). Reduction of the nitro group in compound (VII) by catalytic hydrogenation over Raney-Ni results in amine (VIII) ,which is finally condensed with 2-chloro-7-ethyl-7,8-dihydro-8-isopropyl-5-methylpteridin-6-one (IX) in the presence of p-TsOH·H2O in refluxing i-AmOH .
| 【1】 Grauert, M., Linz, G., Schmid, R., Sieger, P. (Boehringer Ingelheim Pharma GmbH & Co. KG). Trihydrochloride forms of a dihydropteridinone derivative and process for preparation. WO 2007090844. |
| 【2】 Linz, G., Kraemer, G.F., Gutschera, L., Asche, G. (Boehringer Ingelheim International GmbH). Method for the production of dihydropteridinones. WO 2006018220. |
| 【3】 Schnaubelt, J., Herter, R. (Boehringer Ingelheim International GmbH). Process for manufacturing dihydropteridinones and intermediates thereof. WO 2012049153. |
| 【4】 Linz, G., Sieger, P., Schmid, R., Goepper, S. (Boehringer International GmbH). Crystalline form of a dihydropteridinone derivative. WO 2009019205. |
| 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) | 21085 | 3-methoxy-4-nitrobenzoic acid；4-Nitro-3-methoxybenzoic acid | 5081-36-7 | C8H7NO5 | 详情 | 详情 |
| (II) | 21086 | 3-methoxy-4-nitrobenzoyl chloride | C8H6ClNO4 | 详情 | 详情 | |
| (III) | 68529 | trans-4-aminocyclohexanol；trans-4-Hydroxycyclohexylamine；trans-4-Amino-1-cyclohexanol;trans-1-Amino-4-cyclohexanol;4-trans-Hydroxycyclohexylamine;trans-1,4-Cyclohexanolamine | 27489-62-9 | C6H13NO | 详情 | 详情 |
| (IV) | 68530 | C14H18N2O5 | 详情 | 详情 | ||
| (V) | 68531 | 3-methoxy-4-nitro-N-(4-oxocyclohexyl)benzamide | C14H16N2O5 | 详情 | 详情 | |
| (VI) | 68532 | N-(cyclopropylmethyl)piperazine；1-(Cyclopropylmethyl)piperazine | 57184-25-5 | C8H16N2 | 详情 | 详情 |
| (VII) | 68533 | N-((1r,4r)-4-(4-(cyclopropylmethyl)piperazin-1-yl)cyclohexyl)-3-methoxy-4-nitrobenzamide | C22H32N4O4 | 详情 | 详情 | |
| (VIII) | 68534 | 4-amino-N-(4-(4-(cyclopropylmethyl)piperazin-1-yl)cyclohexyl)-3-methoxybenzamide | C22H34N4O2 | 详情 | 详情 | |
| (IX) | 68535 | (R)-2-chloro-7-ethyl-8-isopropyl-5-methyl-7,8-dihydropteridin-6(5H)-one | C12H17ClN4O | 详情 | 详情 |