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【结 构 式】

【分子编号】51854

【品名】 

【CA登记号】

【 分 子 式 】C23H33BrN2O3

【 分 子 量 】465.4307

【元素组成】C 59.35% H 7.15% Br 17.17% N 6.02% O 10.31%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XI)

Protection of isonipecotic acid (I) as the trifluoroacetamide (II), followed by treatment with thionyl chloride, afforded acid chloride (III). Friedel-Crafts reaction of acid chloride (III) with bromobenzene (IV) gave ketone (V), which was further protected as the ethylene ketal (VI). The trifluoroacetamide group of (VI) was then hydrolyzed to amine (VII) using K2CO3 in MeOH. Condensation of amine (VII) with N-Boc-4-piperidone (VIII) in the presence of titanium isopropoxide, and subsequent addition of diethylaluminum cyanide to the intermediate iminium salt, provided amino nitrile (IX). Treatment of (IX) with methylmagnesium bromide afforded the methyl derivative (X). Acid hydrolysis of the ketal and Boc groups of (X), followed by reprotection with Boc2O, furnished ketone (XI). Oxime formation in (XI) with O-ethyl hydroxylamine produced a 1.5:1 mixture of (E)- and (Z)-isomers, which were separated by silica gel chromatography. Previous equilibration of the mixture under acidic conditions favored the desired (Z)-isomer (XII). The Boc protecting group of (XII) was then removed by treatment with trifluoroacetic acid. The resultant piperidine (XIII) was finally coupled with 2,4-dimethylnicotinic acid N-oxide (XIV) using EDC and HOBt to furnish the title compound.

1 Palani, A.; et al.; Discovery of 4-[(Z)-(4-bromophenyl)-(ethoxyimino)methyl]-1'-[(2,4-dimethyl-3-pyridinyl)carbonyl]-4'-methyl-1,4'-bipiperidine N-oxide (SCH 351125). An orally bioavailable human CCR5 antagonist for the treatment of HIV infection. J Med Chem 2001, 44, 21, 3339.
2 Palani, A.; et al.; Synthesis, SAR, and biological evaluation of oximino-piperidino-pieperidine amides. 1. Orally bioavailable CCR5 receptor antagonists with potent anti-HIV activity. J Med Chem 2002, 45, 14, 3143.
3 McCombie, S.W.; Clader, J.W.; Baroudy, B.M.; McKittrick, B.A.; Josien, H.B.; Tagat, J.R.; Vice, S.F.; Steensma, R.; Laughlin, M.A.; Miller, M.W.; Neustadt, B.R.; Palani, A. (Schering Corp.); Piperidine derivs. useful as CCR5 antagonists. EP 1175402; WO 0066559 .
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) 17402 4-nipecotic acid;piperidine-4-carboxylic acid;p-nipecotic acid; Isonipecotic acid; Hexahydroisonicotinic acid; 4-Piperidinecarboxylic acid 498-94-2 C6H11NO2 详情 详情
(II) 51847 1-(2,2,2-trifluoroacetyl)-4-piperidinecarboxylic acid C8H10F3NO3 详情 详情
(III) 51848 1-(2,2,2-trifluoroacetyl)-4-piperidinecarbonyl chloride C8H9ClF3NO2 详情 详情
(IV) 13365 Monobromobenzene; 1-Bromobenzene;Phenylbromide;bromobenzene 108-86-1 C6H5Br 详情 详情
(V) 51849 1-[4-(4-bromobenzoyl)-1-piperidinyl]-2,2,2-trifluoro-1-ethanone C14H13BrF3NO2 详情 详情
(VI) 51850 1-[4-[2-(4-bromophenyl)-1,3-dioxolan-2-yl]-1-piperidinyl]-2,2,2-trifluoro-1-ethanone C16H17BrF3NO3 详情 详情
(VII) 51851 4-[2-(4-bromophenyl)-1,3-dioxolan-2-yl]piperidine C14H18BrNO2 详情 详情
(VIII) 18620 tert-butyl 4-oxo-1-piperidinecarboxylate;BOC-Piperidone;N-(tert-Butoxycarbonyl)-4-piperidone; N-Boc-4-piperidone 79099-07-3 C10H17NO3 详情 详情
(IX) 51852   C25H34BrN3O4 详情 详情
(X) 51853   C25H37BrN2O4 详情 详情
(XI) 51854   C23H33BrN2O3 详情 详情
(XII) 51855   C25H38BrN3O3 详情 详情
(XIII) 51856   C20H30BrN3O 详情 详情
(XIV) 51857 3-carboxy-2,4-dimethyl-1-pyridiniumolate C8H9NO3 详情 详情
Extended Information