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【结 构 式】

【分子编号】49559

【品名】benzyl 2-chloro-4-(chlorocarbonyl)-5-methoxyphenylcarbamate

【CA登记号】

【 分 子 式 】C16H13Cl2NO4

【 分 子 量 】354.18896

【元素组成】C 54.26% H 3.7% Cl 20.02% N 3.95% O 18.07%

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:(V)

The decarboxylation of 3-hydroxy-4,4-dimethoxypiperidine-1-carboxylic acid ethyl ester (I) with KOH in refluxing isopropanol gives the piperidine (II), which is condensed with 3-(4-fluorophenoxy)propyl chloride (III) by means of K2CO3 in refluxing methyl isobutyl ketone to afford the alkylated piperidine (IV). The esterification of the OH group of (IV) with benzoyl chloride (V) and DMAP in dichloromethane provides the ester (VI), which is treated with sulfuric acid in dichloromethane to obtain the piperidinone (VII). The rearrangement of (VII) by means of ammonium acetate and acetic acid provides the amide (VIII), which is treated with TFA in dichloromethane to give the oxo amide (IX). The regioselective hydrogenation of the oxo group of (IX) with potassium selectride in THF affords the cis-hydroxyamide (X), which is hydrogenated with H2 over Pd/C in acetic acid to provide the 4-aminobenzamide (XI). Finally, the free OH group of (XI) is methylated with NaH and dimethyl sulfate in THF.

1 So, R.; Slemon, C.; Oudenes, J.; Ngooi, T.-K.; Lu, Y.-F. (Torcan Chemical Ltd.); Preparation of cisapride. WO 9611186 .
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) 49556 ethyl 3-hydroxy-4,4-dimethoxy-1-piperidinecarboxylate C10H19NO5 详情 详情
(II) 49557 4,4-dimethoxy-3-piperidinol C7H15NO3 详情 详情
(III) 30524 3-chloropropyl 4-fluorophenyl ether; 1-(3-chloropropoxy)-4-fluorobenzene; 1-(4-Fluorophenoxy)-3-chloropropane 1716-42-3 C9H10ClFO 详情 详情
(IV) 49558 1-[3-(4-fluorophenoxy)propyl]-4,4-dimethoxy-3-piperidinol C16H24FNO4 详情 详情
(V) 49559 benzyl 2-chloro-4-(chlorocarbonyl)-5-methoxyphenylcarbamate C16H13Cl2NO4 详情 详情
(VI) 49560 1-[3-(4-fluorophenoxy)propyl]-4,4-dimethoxy-3-piperidinyl 4-[[(benzyloxy)carbonyl]amino]-5-chloro-2-methoxybenzoate C32H36ClFN2O8 详情 详情
(VII) 49561 1-[3-(4-fluorophenoxy)propyl]-4-oxo-3-piperidinyl 4-[[(benzyloxy)carbonyl]amino]-5-chloro-2-methoxybenzoate C30H30ClFN2O7 详情 详情
(VIII) 49562 benzyl 2-chloro-4-[([1-[3-(4-fluorophenoxy)propyl]-3-hydroxy-4-methoxy-4-piperidinyl]amino)carbonyl]-5-methoxyphenylcarbamate C31H35ClFN3O7 详情 详情
(IX) 49563 benzyl 2-chloro-4-[([1-[3-(4-fluorophenoxy)propyl]-3-oxo-4-piperidinyl]amino)carbonyl]-5-methoxyphenylcarbamate C30H31ClFN3O6 详情 详情
(X) 49564 benzyl 2-chloro-4-[([(3S,4R)-1-[3-(4-fluorophenoxy)propyl]-3-hydroxypiperidinyl]amino)carbonyl]-5-methoxyphenylcarbamate C30H33ClFN3O6 详情 详情
(XI) 49565 4-amino-5-chloro-N-[(3S,4R)-1-[3-(4-fluorophenoxy)propyl]-3-hydroxypiperidinyl]-2-methoxybenzamide C22H27ClFN3O4 详情 详情
Extended Information