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【结 构 式】

【药物名称】Loperamide oxide, JKD-584, R-58425, Arestal

【化学名称】trans-4-(4-Chlorophenyl)-4-hydroxy-N,N-dimethyl-alpha,alpha-diphenyl-1-piperidinebutanamide N-oxide

【CA登记号】106900-12-3

【 分 子 式 】C29H33ClN2O3

【 分 子 量 】493.05096

【开发单位】Janssen (Originator), Janssen-Kyowa (Originator), Dainippon Pharmaceutical (Licensee)

【药理作用】Antidiarrheal Agents, GASTROINTESTINAL DRUGS

合成路线1

Treatment of 2-oxo-3,3-diphenyl-tetrahydrofuran (I) with HBr(g) yields bromo derivative (II), which is then converted into butyryl chloride derivative (III) by means of thionyl chloride in refluxing chloroform. Reaction of derivative (III) with dimethylamine (IV) in toluene affords dimethyl (tetrahydro-3,3-diphenyl-2-furylidene)ammonium bromide (V), which is then condensed with 4-(4-chlorophenyl)-4-piperidinol (VI) by means of Na2CO3 and KI in refluxing 4-methyl-2-pentanone to provide N,N-dimethyl butyramide derivative (VII). Finally, the target product is obtained by N-oxidation of the piperidine ring in (VII) by heating with H2O2 in MeOH/methylbenzene or in 4-methyl-2-pentanone.

1 Cooymans, L.P.; Wals, L. (Janssen Pharmaceutica NV); Novel alpha,alpha-diaryl-4-aryl-4-hydroxy-1-piperidinebutanamide, N-oxides. EP 0219898; JP 1987087569; US 4824853; US 4898873 .
2 Niemegeers, C.J.E.J.; Janssen, P.A.J.; Stokbroekx, R.A.; Vandenberk, J. (Janssen Pharmaceutica NV); 2,2-Diaryl-4-(4'-aryl-4'-hydroxy-piperidino)-butyramides. US 3714159 .
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) 48324 alpha,alpha-Diphenyl-gamma-butyrolactone; 4-Methoxychalcone; (4-Methoxybenzylidene)acetophenone; Dihydro-3,3-diphenyl-2(3H)-furanone; 4-Hydroxy-2,2-diphenylbutyric acid gamma-lactone; alpha,alpha-Diphenylbutyrolactone 959-33-1 C16H14O2 详情 详情
(II) 48325 4-bromo-2,2-diphenylbutyric acid C16H15BrO2 详情 详情
(III) 48326 4-bromo-2,2-diphenylbutanoyl chloride C16H14BrClO 详情 详情
(IV) 19443 N-methylmethanamine; N,N-dimethylamine 124-40-3 C2H7N 详情 详情
(V) 48327 N-[3,3-diphenyldihydro-2(3H)-furanylidene]-N-methylmethanaminium bromide C18H20BrNO 详情 详情
(VI) 35870 4-(4-chlorophenyl)-4-piperidinol; 4-(4-Chlorophenyl)-4-hydroxypiperidine 39512-49-7 C11H14ClNO 详情 详情
(VII) 48328 4-[4-(4-chlorophenyl)-4-hydroxy-1-piperidinyl]-N,N-dimethyl-2,2-diphenylbutanamide C29H33ClN2O2 详情 详情
Extended Information