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【结 构 式】

【药物名称】Quinpirole hydrochloride, LY-171555

【化学名称】(4aR-trans)-4,4a,5,6,7,8,8a,9-Octahydro-5-propyl-1H-pyrazolo[3,4-g]quinoline monohydrochloride

【CA登记号】85798-08-9, 85760-74-3 (free base)

【 分 子 式 】C13H22ClN3

【 分 子 量 】255.79339

【开发单位】Lilly (Originator)

【药理作用】CARDIOVASCULAR DRUGS, Hypertension, Treatment of, Dopamine D2 Agonists

合成路线1

The reaction of 4-benzoyloxycyclohexanone (I) with pyrrolidine (II) by means of p-toluenesulfonic acid in refluxing benzene gives the corresponding enamine (III), which is cyclized with acrylamide (IV) in refluxing dioxane yielding the mixture of hexahydroquinolones (V) and (VI). Benzylation of this mixture with benzylbromide (A) and NaH in THF affords the mixture of N-benzylquinolones (VII) and (VIII), which is reduced with LiAlH4 to the mixture of N-benzylhexahydroquinolines (IX) and (X). The reduction of this mixture with sodium cyanoborohydride in THF affords trans-1-benzyl-6-hydroxydecahydro quinoline (XI), which by reaction with BN in CH2Cl2 is converted to trans-1-cyano-6-hydroxydecahydro quinoline (XII). Oxidation of (XII) with CrO3/pyridine in CH2Cl2 gives the corresponding quinolone (XIII), which by reaction with dimethylformamide dimethyl acetal (XIV) in refluxing benzene is converted to 1-cyano-6-oxo-7-(dimethylaminomethylene)decahydroquinoline (XV). The cyclization of (XV) with hydrazine in refluxing methanol affords 5-cyano-4,4a,5,6,7,8,8a,9-octahydro-1H-pyrazolo[3,4-g]quinoline (XVI), which by a reductive cleavage with Zn and acetic acid gives 4,4a,5,6,7,8,8a,9-octahydro-1H-pyrazolo[3,4-g]quinoline (XVII). Finally, this compound is alkylated with propionaldehyde (B) and sodium cyanoborohydride in methanol.

1 Bach, N.; Kornfeld, E.C. (Eli Lilly and Company); Prolactin inhibiting octahydropyrazolo[3,4-g]quinolines. DD 148517; EP 0013787; ES 482087; FR 2446820; FR 2446821; FR 2446822; GB 2040915; GB 2092579; US 4198415 .
2 Serradell, M.N.; Castaner, J.; Castaner, R.M.; Mannhold, R.; Quinpirole Hydrochloride. Drugs Fut 1987, 12, 6, 558.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(A) 12912 1-(Bromomethyl)benzene; Alpha-bromotoluene 100-39-0 C7H7Br 详情 详情
(B) 15966 propionaldehyde 123-38-6 C3H6O 详情 详情
(I) 16967 N-(tert-butyl)-5-propyl-2-thiophenecarboxamide C12H19NOS 详情 详情
(II) 11376 Pyrrolidine 123-75-1 C4H9N 详情 详情
(III) 28829 4-(1-pyrrolidinyl)-3-cyclohexen-1-yl benzoate C17H21NO2 详情 详情
(IV) 10851 Acrylamide 79-06-1 C3H5NO 详情 详情
(V) 28830 2-oxo-1,2,3,4,5,6,7,8-octahydro-6-quinolinyl benzoate C16H17NO3 详情 详情
(VI) 28831 2-oxo-1,2,3,4,4a,5,6,7-octahydro-6-quinolinyl benzoate C16H17NO3 详情 详情
(VII) 28832 1-benzyl-2-oxo-1,2,3,4,5,6,7,8-octahydro-6-quinolinyl benzoate C23H23NO3 详情 详情
(VIII) 28833 1-benzyl-2-oxo-1,2,3,4,4a,5,6,7-octahydro-6-quinolinyl benzoate C23H23NO3 详情 详情
(IX) 28834 1-benzyl-6-hydroxy-3,4,5,6,7,8-hexahydro-2(1H)-quinolinone C16H19NO2 详情 详情
(X) 28835 1-benzyl-6-hydroxy-3,4,4a,5,6,7-hexahydro-2(1H)-quinolinone C16H19NO2 详情 详情
(XI) 28836 (4aR,8aR)-1-benzyldecahydro-6-quinolinol C16H23NO 详情 详情
(XII) 28837 (4aR,8aR)-1-cyanodecahydro-6-quinolinol C10H16N2O 详情 详情
(XIII) 28838 (4aR,8aR)-1-cyanooctahydro-6(2H)-quinolinone C10H14N2O 详情 详情
(XIV) 11984 N-(Dimethoxymethyl)-N,N-dimethylamine;dimethylformamide dimethylacetal;1,1-dimethoxy-N,N-dimethylmethanamine; Dimethoxy-N,N-dimethylmethanamine; N,N-Dimethylformamide dimethyl acetal 4637-24-5 C5H13NO2 详情 详情
(XV) 28839 (4aR,8aR)-1-cyano-7-[(Z)-(dimethylamino)methylidene]octahydro-6-quinolinone C13H19N3O 详情 详情
(XVI) 28840 (4aR,8aR)-5-cyano-4,4a,5,6,7,8,8a,9-octahydro-1H-pyrazolo[3,4-g]quinoline C11H14N4 详情 详情
(XVII) 28841 (4aR,8aR)-4,4a,5,6,7,8,8a,9-octahydro-1H-pyrazolo[3,4-g]quinoline C10H15N3 详情 详情
Extended Information