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【结 构 式】 
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【分子编号】43156 【品名】1-(benzyloxy)-4-bromobenzene; benzyl 4-bromophenyl ether 【CA登记号】6793-92-6 |
【 分 子 式 】C13H11BrO 【 分 子 量 】263.13374 【元素组成】C 59.34% H 4.21% Br 30.37% O 6.08% |
合成路线1
该中间体在本合成路线中的序号：(X)The intermediate 4-[4-(4-aminophenyl)piperazin-1-yl]phenol (VIII) has been obtained by several related ways: 1.- The condensation of 4-bromonitrobenzene (I) with piperazine (II) gives 1-(4-nitrophenyl)piperazine (III), which is condensed with 4-bromoanisole (IV) by means of Pdo to yield 1-(4-methoxyphenyl)-4-(4-nitrophenyl)piperazine (V). Alternatively, (V) can also be obtained by condensation of (III) with 4-methoxyphenylboronic acid (VI) by means of Cu(OAc)2 in DMSO. The demethylation of (V) with HBr yields 4-[4-(4-nitrophenyl)piperazin-1-yl]phenol (VII), which is finally reduced with H2 over Pd/C to afford the target 4-[4-(4-aminophenyl)piperazin-1-yl]phenol (VIII) intermediate (see Synthline, scheme no. 22656202a, intermediate (XIV)). 2.- The condensation of piperazine (II) with 4-bromoanisole (IV) by means of Pdo gives 1-(4-methoxyphenyl)piperazine (IX), which is condensed with 4-bromonitrobenzene (I) by means of K2CO3 and tetrabutylammonium iodide (TBAI) in hot DMSO to yield intermediate 1-(4-methoxyphenyl)-4-(4-nitrophenyl)piperazine (V), already reported. 3.- The condensation of piperazine (II) with 4-(benzyloxy)phenyl bromide (X) by means of Pdo gives 1-(4-benzyloxyphenyl)piperazine (XI), which is condensed with 4-bromonitrobenzene (I) by means of K2CO3 and TBAI in hot DMSO to yield 1-(4-benzyloxyphenyl)-4-(4-nitrophenyl)piperazine (XII). The nitro group of (XII) is reduced by means of H2 (50 psi) over Pd/C in wet THF at 50? C to afford 4-[4-(4-benzyloxyphenyl)piperazin-1-yl]aniline (XIII), which is finally debenzylated with H2 (80 psi) over Pd/C in wet THF at 70? C or other drastic conditions to afford the target 4-[4-(4-aminophenyl)piperazin-1-yl]phenol (VIII) intermediate (see Synthline, scheme no. 22656202a, intermediate (XIV)). Alternatively, 1-(4-benzyloxyphenyl)-4-(4-nitrophenyl)piperazine (XII) can also be reduced directly to the target intermediate (VIII) with H2 over Pd/C under a variety of drastic conditions.
| 【1】 Hepperle, M.; Eckert, J.; Gala, D.; Shen, L.; Evans, C.A.; Goodman, A.; Mono N-arylation of piperazine(III): Metal-catalyzed N-arylation and its application to the novel preparations of the antifungal posaconazole and its advanced intermediate. Tetrahedron Lett 2002, 43, 18, 3359. |
| 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) | 26628 | 1-bromo-4-nitrobenzene | 99-99-0 | C6H4BrNO2 | 详情 | 详情 |
| (II) | 10355 | Diethylenediamine; Piperazine | 110-85-0 | C4H10N2 | 详情 | 详情 |
| (III) | 20299 | 1-(4-nitrophenyl)piperazine | 6269-89-2 | C10H13N3O2 | 详情 | 详情 |
| (IV) | 63436 | 1-bromo-4-methoxybenzene; 4-bromophenyl methyl ether | C7H7BrO | 详情 | 详情 | |
| (V) | 16314 | methyl 4-[4-(4-nitrophenyl)piperazino]phenyl ether; 1-(4-methoxyphenyl)-4-(4-nitrophenyl)piperazine | C17H19N3O3 | 详情 | 详情 | |
| (VI) | 39246 | 4-methoxyphenylboronic acid | 5720-07-0 | C7H9BO3 | 详情 | 详情 |
| (VII) | 16345 | 4-[4-(4-nitrophenyl)piperazino]phenol | C16H17N3O3 | 详情 | 详情 | |
| (VIII) | 17110 | 4-[4-(4-aminophenyl)piperazino]phenol; 1-(4-Aminophenyl)-4-(4-hydroxyphenyl)piperazine; 1-(4-Hydroxyphenyl)-4-(4-aminophenyl)piperazine | 74853-08-0 | C16H19N3O | 详情 | 详情 |
| (IX) | 16312 | 1-(4-Methoxyphenyl)piperazine; Methyl 4-piperazinophenyl ether | 38212-30-5 | C11H16N2O | 详情 | 详情 |
| (X) | 43156 | 1-(benzyloxy)-4-bromobenzene; benzyl 4-bromophenyl ether | 6793-92-6 | C13H11BrO | 详情 | 详情 |
| (XI) | 64373 | 1-[4-(benzyloxy)phenyl]piperazine; benzyl 4-(1-piperazinyl)phenyl ether | C17H20N2O | 详情 | 详情 | |
| (XII) | 64372 | benzyl 4-[4-(4-nitrophenyl)-1-piperazinyl]phenyl ether; 1-[4-(benzyloxy)phenyl]-4-(4-nitrophenyl)piperazine | C23H23N3O3 | 详情 | 详情 | |
| (XIII) | 64371 | 4-{4-[4-(benzyloxy)phenyl]-1-piperazinyl}aniline; 4-{4-[4-(benzyloxy)phenyl]-1-piperazinyl}phenylamine | C23H25N3O | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(IV)In an alternative procedure, lithiation of 4-(benzyloxy)-1-bromobenzene (IV), followed by addition of 1-benzyl-4-piperidone (V), gave piperidinol (VI). Subsequent treatment of (VI) with HCl produced dehydration of the tertiary alcohol and benzyl ether cleavage to give (VII). Double bond reduction and hydrogenolysis of the N-benzyl group of (VII) with H2 over Pd/C gave 4-(4-hydroxyphenyl)piperidine (VIII). This was finally alkylated with tosylate (II) to yield the title compound.
| 【1】 Guzikowski, A.P.; Acosta-Burruel, M.; Tamiz, A.P.; et al.; Synthesis of N-substituted 4-(4-hydroxyphenyl)piperidines, 4-(4-hydroxybenzyl)piperidines, and (±)-3-(4-hydroxyphenyl)pyrrolidines: Selective antagonists at the 1A/2B NMDA receptor subtype. J Med Chem 2000, 43, 5, 984. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (II) | 43154 | 4-phenylbutyl 4-methylbenzenesulfonate | C17H20O3S | 详情 | 详情 | |
| (IV) | 43156 | 1-(benzyloxy)-4-bromobenzene; benzyl 4-bromophenyl ether | 6793-92-6 | C13H11BrO | 详情 | 详情 |
| (V) | 15720 | 1-benzyltetrahydro-4(1H)-pyridinone; 1-Benzyl-4-piperidone; N-Benzyl-4-piperidone; 1-(benzyl)-4-piperidinone; 1-benzylpiperidin-4-one; 1-(benzyl)piperidin-4-one | 3612-20-2 | C12H15NO | 详情 | 详情 |
| (VI) | 43157 | 1-benzyl-4-[4-(benzyloxy)phenyl]-4-piperidinol | C25H27NO2 | 详情 | 详情 | |
| (VII) | 43158 | 4-(1-benzyl-1,2,3,6-tetrahydro-4-pyridinyl)phenol | C18H19NO | 详情 | 详情 | |
| (VIII) | 43159 | 4-(4-piperidinyl)phenol | C11H15NO | 详情 | 详情 |