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【结 构 式】

【分子编号】19402

【品名】2-[[4-(4-chlorophenyl)cyclohexyl]oxy]-2-oxoacetic acid

【CA登记号】

【 分 子 式 】C14H15ClO4

【 分 子 量 】282.7234

【元素组成】C 59.48% H 5.35% Cl 12.54% O 22.64%

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:(VIII)

Aryl lithium reagent (II) (prepared by halogen-metal exchange of 1-chloro-4-iodobenzene (I) with tert-butyllithium at -60 C), was added to 1,4-cyclohexanedione mono-ethylene ketal (III) to yield tertiary alcohol (IV). Then, mild acid hydrolysis of (IV) with pyridinium tosylate in aqueous acetone provided ketone (V). Deoxygenation of the benzylic alcohol of (V) with P2I4 in refluxing benzene produced the arylcyclohexanone (VI), which was further reduced to the trans cyclohexanol (VII) with NaBH4 in MeOH. Subsequent acylation of (VIII) with oxalyl chloride, followed by an aqueous quench furnished the oxalic acid monoester (VIII). The free-radical decarboxylative coupling of (VIII) with 2-chloronaphthoquinone (IX), promoted by ammonium persulfate and a trace of AgNO3 under phase-transfer conditions, provided the desired cyclohexylquinone (X) together with the cyclohexyl ester (XI) as mixtures of cis and trans isomers, which were separated by flash chromatography. Finally, conversion of the trans-(X) to the target hydroxylated compound was performed by treatment with KOH in boiling MeOH.

1 Frank, A.; Karn, H.; Spanig, H. (Abbott GmbH & Co. KG); Production of 1-hydroxyalkyl-5-nitroimidazoles. DE 2359625; FR 2253019; GB 1481349 .
2 Frank, A.; Dockner, T.; Karn, H. (Abbott GmbH & Co. KG); Process for the preparation of 1-(2-hydroxyethyl)-2-methyl-5-nitroimidazole of high purity. EP 0150407 .
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) 19395 1-chloro-4-iodobenzene 637-87-6 C6H4ClI 详情 详情
(II) 19396 (4-chlorophenyl)lithium C6H4ClLi 详情 详情
(III) 11377 1,4-Dioxaspiro[4.5]decan-8-one 4746-97-8 C8H12O3 详情 详情
(IV) 19398 8-(4-chlorophenyl)-1,4-dioxaspiro[4.5]decan-8-ol C14H17ClO3 详情 详情
(V) 19399 4-(4-chlorophenyl)-4-hydroxycyclohexanone C12H13ClO2 详情 详情
(VI) 19400 4-(4-chlorophenyl)cyclohexanone C12H13ClO 详情 详情
(VII) 19401 4-(4-chlorophenyl)cyclohexanol C12H15ClO 详情 详情
(VIII) 19402 2-[[4-(4-chlorophenyl)cyclohexyl]oxy]-2-oxoacetic acid C14H15ClO4 详情 详情
(IX) 19403 2-chloronaphthoquinone 1010-60-2 C10H5ClO2 详情 详情
(X) 19404 2-chloro-3-[4-(4-chlorophenyl)cyclohexyl]naphthoquinone C22H18Cl2O2 详情 详情
(XI) 19405 4-(4-chlorophenyl)cyclohexyl 3-chloro-1,4-dioxo-1,4-dihydro-2-naphthalenecarboxylate C23H18Cl2O4 详情 详情
Extended Information