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【结 构 式】

【药物名称】FR-166124

【化学名称】2-[2-[6-Oxo-3-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-1,6-dihydropyridazin-1-yl]-1-cyclohexenyl]acetic acid

【CA登记号】

【 分 子 式 】C25H22N4O3

【 分 子 量 】426.47909

【开发单位】Fujisawa (Originator)

【药理作用】CARDIOVASCULAR DRUGS, Diuretics, Hypertension, Treatment of, Renal Failure, Agents for, RENAL-UROLOGIC DRUGS, Treatment of Renal Diseases, Vasodilators, Adenosine A1 Antagonists

合成路线1

This compound was prepared by two ways starting from 3-(3-oxo-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo[1,5-a]pyridine (I). Alkylation of (I) with 2-chlorocyclohexanone (II) in the presence of NaH in DMF gave diketone (V). Alternatively, condensation of (I) with epoxycyclohexane and NaH in DMF at 127 C yielded the ketoalcohol (IV) as a mixture of cis and trans isomers, which were separated by column chromatography. The major trans isomer was then oxidized with pyridinium dichromate to the diketone (V). Reaction of this diketone with the sodium salt of triethyl phosphonoacetate (VI) in toluene at 100 C afforded a mixture of unsaturated esters (VII) and (VIII), which were subsequently submitted to hydrolysis with NaOH. Then, column chromatography of the mixture provided the desired endocyclic unsaturated acid.

1 Tenda, Y.; Kinoshita, T.; Sakane, K.; Nishimura, S.; Akahane, A.; Durkin, K.; Kuroda, S.; Discovery of FR166124, a novel water-soluble pyrazolo-[1,5-a]pyridine adenosine A1 receptor antagonist. Bioorg Med Chem Lett 1999, 9, 14, 1979.
2 Akahane, A.; Nishimura, S.; Itani, H.; Durkin, K.P.M. (Fujisawa Pharmaceutical Co., Ltd.); Pyrazolopyridine adenosine antagonists. EP 0737193; JP 1997507485; US 5773530; WO 9518128 .
3 Zanka, A.; et al.; Process improvements in the production of a novel non-xanthine adenosine A1 receptopr antagonist. A "one-pot" horner-emmons isomerization reaction. Org Process Res Dev 1999, 3, 6, 394.
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) 17984 6-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-3(2H)-pyridazinone C17H12N4O 详情 详情
(II) 17985 2-Chlorocyclohexanone 822-87-7 C6H9ClO 详情 详情
(III) 17986 7-oxabicyclo[4.1.0]heptane; cyclohexene oxide 286-20-4 C6H10O 详情 详情
(IV) 17987 2-(2-hydroxycyclohexyl)-6-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-3(2H)-pyridazinone C23H22N4O2 详情 详情
(V) 17988 2-(2-oxocyclohexyl)-6-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-3(2H)-pyridazinone C23H20N4O2 详情 详情
(VI) 10019 Ethyl 2-(diethoxyphosphoryl)acetate; Triethyl phosphonoacetate 867-13-0 C8H17O5P 详情 详情
(VII) 17990 ethyl 2-[2-[6-oxo-3-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-1(6H)-pyridazinyl]cyclohexylidene]acetate C27H26N4O3 详情 详情
(VIII) 17991 ethyl 2-[2-[6-oxo-3-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-1(6H)-pyridazinyl]-1-cyclohexen-1-yl]acetate C27H26N4O3 详情 详情
Extended Information