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【结 构 式】

【分子编号】43359

【品名】2,2-dimethylcyclopentanecarbonitrile

【CA登记号】

【 分 子 式 】C8H13N

【 分 子 量 】123.19796

【元素组成】C 77.99% H 10.64% N 11.37%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(II)

Treatment of 2,2-dimethylcyclopentanone (I) with tosylmethyl isocyanide and potassium tert-butoxide produced nitrile (II), which was reduced to amine (III) employing LiAlH4 in THF. Coupling of amine (III) with mono-methyl terephthalate (IV) by means of EDC and HOBt gave amide (V). The target oxadiazole system was then obtained by condensation of (V) with N-hydroxypentamidine (VI) in the presence of NaH, and the (S)-enantiomer was isolated by using chiral HPLC.

1 Poss, M.A.; Lloyd, J.; Rovnyak, G.C.; Caulfield, T.J.; Atwal, K.S.; Stein, P.D.; Ahmad, S. (Bristol-Myers Squibb Co.); Benzoic acid derivs. and related cpds. as antiarrhythmic agents. WO 9837068 .
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) 43358 2,2-dimethylcyclopentanone C7H12O 详情 详情
(II) 43359 2,2-dimethylcyclopentanecarbonitrile C8H13N 详情 详情
(III) 43360 (2,2-dimethylcyclopentyl)methylamine; (2,2-dimethylcyclopentyl)methanamine C8H17N 详情 详情
(IV) 43361 4-(methoxycarbonyl)benzoic acid 1679-64-7 C9H8O4 详情 详情
(V) 43362 methyl 4-([[(2,2-dimethylcyclopentyl)methyl]amino]carbonyl)benzoate C17H23NO3 详情 详情
(VI) 43363 N'-hydroxypentanimidamide C5H12N2O 详情 详情

合成路线2

该中间体在本合成路线中的序号:(II)

Amine (III) was synthesized from 2,2-dimethylcyclopentanone (I) by treatment with tosylmethyl isocyanide, followed by reduction of the resultant nitrile (II) with LiAlH4. Condensation of 4-cyanobenzoic acid (IV) with amine (III) produced the corresponding amide (V). Subsequent addition of hydroxylamine to the cyano group of (V) gave rise to the hydroxyamidine (VI). The target oxadiazole derivative was then obtained by condensation of (VI) with 4,4,4-trifluorobutyric acid (VII), followed by cyclization under basic conditions. Separation of the enantiomers was carried out by chiral preparative HPLC.

1 LLoyd, J.; et al.; Design and synthesis of 4-substituted benzamides as potent, selective, and orally bioavailable IKS blockers. J Med Chem 2001, 44, 23, 3764.
2 Poss, M.A.; Lloyd, J.; Rovnyak, G.C.; Caulfield, T.J.; Atwal, K.S.; Stein, P.D.; Ahmad, S. (Bristol-Myers Squibb Co.); Benzoic acid derivs. and related cpds. as antiarrhythmic agents. WO 9837068 .
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) 43358 2,2-dimethylcyclopentanone C7H12O 详情 详情
(II) 43359 2,2-dimethylcyclopentanecarbonitrile C8H13N 详情 详情
(III) 43360 (2,2-dimethylcyclopentyl)methylamine; (2,2-dimethylcyclopentyl)methanamine C8H17N 详情 详情
(IV) 36897 4-cyanobenzoic acid;4-Carboxybenzonitrile;p-Carboxybenzonitrile 619-65-8 C8H5NO2 详情 详情
(V) 52509 4-cyano-N-[(2,2-dimethylcyclopentyl)methyl]benzamide C16H20N2O 详情 详情
(VI) 52510 4-[amino(hydroxyimino)methyl]-N-[(2,2-dimethylcyclopentyl)methyl]benzamide C16H23N3O2 详情 详情
(VII) 14781 4,4,4-Trifluorobutyric acid 406-93-9 C4H5F3O2 详情 详情
Extended Information