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【结 构 式】

【分子编号】35223

【品名】(3S)-3-[(4-bromo-2,6-dimethylphenoxy)methyl]piperidine; 4-bromo-2,6-dimethylphenyl (3S)piperidinylmethyl ether

【CA登记号】

【 分 子 式 】C14H20BrNO

【 分 子 量 】298.22294

【元素组成】C 56.39% H 6.76% Br 26.79% N 4.7% O 5.36%

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:(VII)

Racemic ethyl 3-piperidinecarboxylate (Ia, Ib) was resolved with D-(-)-tartaric acid in EtOH to afford the (S)-piperidine tartrate salt (II). After protection of (II) as the N-Boc derivative (III) by treatment with di-tert-butyl dicarbonate and NaOH, reduction of the carboxylate group of (III) by means of LiBH4 provided alcohol (IV). Subsequent coupling of (IV) with 4-bromo-2,6-dimethylphenol (V) under Mitsunobu conditions provided ether (VI). The N-Boc protecting group of (VI) was then cleaved employing trifluoroacetic acid to give piperidine (VII). Finally, Eschweiler-Clarke methylation using formaldehyde and formic acid furnished the corresponding N-methyl piperidine, which was isolated after conversion to the hydrochloride salt.

1 Kojima, N.; Nishino, C. (Shiseido Co. Ltd.); Benzamide deriv., anti-ulcer drug, and antibacterial drug. EP 0869124; JP 1998279570; US 5891890 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(Ib) 12453 ethyl (3R)hexahydro-3-pyridinecarboxylate C8H15NO2 详情 详情
(Ia),(II) 35224 ethyl (3S)-3-piperidinecarboxylate C8H15NO2 详情 详情
(III) 35220 1-(tert-butyl) 3-ethyl (3S)-1,3-piperidinedicarboxylate C13H23NO4 详情 详情
(IV) 35221 tert-butyl (3S)-3-(hydroxymethyl)-1-piperidinecarboxylate C11H21NO3 详情 详情
(V) 31142 4-bromo-2,6-dimethylphenol 2374-05-2 C8H9BrO 详情 详情
(VI) 35222 tert-butyl (3S)-3-[(4-bromo-2,6-dimethylphenoxy)methyl]-1-piperidinecarboxylate C19H28BrNO3 详情 详情
(VII) 35223 (3S)-3-[(4-bromo-2,6-dimethylphenoxy)methyl]piperidine; 4-bromo-2,6-dimethylphenyl (3S)piperidinylmethyl ether C14H20BrNO 详情 详情
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