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【结 构 式】

【分子编号】19915

【品名】2-tetrahydro-1H-pyrrolizin-7(5H)-ylacetonitrile

【CA登记号】

【 分 子 式 】C9H14N2

【 分 子 量 】150.22364

【元素组成】C 71.96% H 9.39% N 18.65%

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:(XI)

Alkylation of methyl 4-(acetylamino)-2-hydroxybenzoate (I) with propargyl bromide (II) in the presence of K2CO3 in refluxing acetonitrile gave propargyl ether (III), and subsequent chlorination with N-chlorosuccinimide in DMF yielded (IV). Then, a Claisen-type rearrangement of (IV) in boiling diphenyl ether furnished the benzopyran (V), which was hydrogenated over Pt/C to give dihydrobenzopyran (VI). Subsequent treatment of (VI) with 4 N KOH produced the hydrolysis of both ester and amide functions, affording acid (VII). Treatment of dicyclopropyl ketone (VIII) with HCl gas provided 1,7-dichloro-4-heptanone (IX). Cyclization of (IX) with cyanoacetic acid in a two-phase system of aqueous ammonia and n-hexane gave bicyclic intermediate (X), which upon decarboxylation yielded nitrile (XI). Subsequent hydrogenation in the presence of Raney-Ni and NaOH furnished 5-(2-aminoethyl)-1-azabicyclo[3.3.0]octane (XII) (3). The title compound was then obtained by coupling of acid (VII) with amine (XII) using carbonyldiimidazole (CDI), followed by conversion to the hemifumarate salt.

1 Kakigami, T.; et al.; Synthesis and structure-activity relationship of 3-substituted benzamide, benzo[b]furan-7-carboxamide, 2,3-dihydrobenzo[b]furan-7-carboxamide, and indole-5-carboxamide derivatives as selective serotonin 5-HT4 receptor agonists. Chem Pharm Bull 1998, 46, 1, 42.
2 Suzuki, T.; et al.; N-[2-(1-Azabicyclo[3.3.0]octan-5-yl)ethyl]-2-nitroaniline, a potent muscarinic agonist. Chem Pharm Bull 1997, 45, 7, 1218.
3 Kakigami, T.; et al.; A 3D-quantitative structure-activity relationship study of benzamide type serotonin 5-HT4 receptor agonists based on a comparative molecular field analysis model, and the design and synthesis of potent agonists. Chem Pharm Bull 1998, 46, 12, 1881.
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) 12330 methyl 4-(acetamido)-2-hydroxybenzoate C10H11NO4 详情 详情
(II) 11176 3-Bromopropyne; 3-Bromo-1-propyne 106-96-7 C3H3Br 详情 详情
(III) 19907 methyl 4-(acetamido)-2-(2-propynyloxy)benzoate C13H13NO4 详情 详情
(IV) 19908 methyl 4-(acetamido)-5-chloro-2-(2-propynyloxy)benzoate C13H12ClNO4 详情 详情
(V) 19909 methyl 5-(acetamido)-6-chloro-2H-chromene-8-carboxylate C13H12ClNO4 详情 详情
(VI) 19910 methyl 5-(acetamido)-6-chloro-8-chromanecarboxylate C13H14ClNO4 详情 详情
(VII) 19911 5-amino-6-chloro-8-chromanecarboxylic acid C10H10ClNO3 详情 详情
(VIII) 19912 Dicyclopropylmethanone; Dicyclopropyl ketone 1121-37-5 C7H10O 详情 详情
(IX) 19913 1,7-dichloro-4-heptanone 40624-07-5 C7H12Cl2O 详情 详情
(X) 19914 2-cyano-2-tetrahydro-1H-pyrrolizin-7(5H)-ylacetic acid C10H14N2O2 详情 详情
(XI) 19915 2-tetrahydro-1H-pyrrolizin-7(5H)-ylacetonitrile C9H14N2 详情 详情
(XII) 19916 2-tetrahydro-1H-pyrrolizin-7(5H)-ylethylamine; 2-tetrahydro-1H-pyrrolizin-7(5H)-yl-1-ethanamine C9H18N2 详情 详情
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