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【结 构 式】

【分子编号】49428

【品名】2-benzyl 1-(tert-butyl) (2R,4R)-4-methyl-1,2-piperidinedicarboxylate

【CA登记号】

【 分 子 式 】C19H27NO4

【 分 子 量 】333.42772

【元素组成】C 68.44% H 8.16% N 4.2% O 19.19%

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:(III)

A new short synthesis of argatroban has been reported: The protection of 4-methylpiperidine (I) with (Boc)2O gives the carbamate (II), which is condensed with benzyl chloroformate by means of sec-butyl lithium and TMEDA in ethyl ether to yield (±)-trans-1-(tert-butoxycarbonyl)-4-methylpiperidine-2-carboxylic acid benzyl ester (III). Deprotection of the NH group of (III) with HCl in ethyl acetate affords (±)-trans-4-methylpiperidine-2-carboxylic acid benzyl ester (IV), which is condensed with the protected arginine derivative (V) by means of isobutyl chloroformate and TEA to provide the corresponding amide as a diastereomeric mixture. Resolution of this mixture by flash chromatography furnishes the desired diastereomer (VI), which is treated with HCl in ethyl acetate in order to remove the Boc-protecting group to yield compound (VII). Condensation of compound (VII) with 3-methylquinoline-8-sulfonyl chloride (VIII) by means of TEA in dichloromethane affords the expected sulfonamide (IX). Finally, this compound is submitted to hydrogenation with H2 over Pd/C in AcOH/ethanol in order to produce debenzylation, cleavage of the NO2 group and hydrogenation of the pyridine ring to yield argatroban.

1 Belotti, D.; Cossy, J.; A short synthesis of argatroban: A potent selective thrombin inhibitor. Bioorg Med Chem Lett 2001, 11, 15, 1989.
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) 10192 4-Methylpiperidine; gamma-Pipecoline 626-58-4 C6H13N 详情 详情
(II) 49427 tert-butyl 4-methyl-1-piperidinecarboxylate C11H21NO2 详情 详情
(III) 49428 2-benzyl 1-(tert-butyl) (2R,4R)-4-methyl-1,2-piperidinedicarboxylate C19H27NO4 详情 详情
(IV) 49429 benzyl (2R,4R)-4-methyl-2-piperidinecarboxylate C14H19NO2 详情 详情
(V) 32085 N(G)-nitro-N2-(tert-butoxy-carbonyl)-L-arginine; Nalpha-(tert-butoxycarbonyl)-Nomega-nitro-L-arginine C11H21N5O6 详情 详情
(VI) 49430   C25H38N6O7 详情 详情
(VII) 49431   C20H30N6O5 详情 详情
(VIII) 32089 3-methylquinoline-8-suIfonyl chloride; 3-methyl-8-quinolinesulfonyl chloride C10H8ClNO2S 详情 详情
(IX) 49432   C30H37N7O7S 详情 详情
Extended Information