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【结 构 式】

【药物名称】Tizanidine hydrochloride, DS-103282 ch, AN-021A, DS-103282, Zanaflex, Ternelin, Sirdalud

【化学名称】5-Chloro-4-(2-imidazolin-2-ylamino)-2,1,3-benzothiadiazole hydrochloride
      5-Chloro-N-(4,5-dihydro-1H-imidazol-2-yl)-2,1,3-benzothiadiazole hydrochloride

【CA登记号】64461-82-1, 51322-75-9 (free base)

【 分 子 式 】C9H9Cl2N5S

【 分 子 量 】290.17558

【开发单位】Novartis (Originator), Draxis Health (Licensee), Elan (Licensee), Shire Pharmaceuticals (Licensee)

【药理作用】Antispastic Drugs, Antispastic Drugs and Drugs for Muscle Spasms, NEUROLOGIC DRUGS, alpha2-Adrenoceptor Agonists

合成路线1

4-Amino-5-chloro-2,1,3-benzothiadiazole (I) is reacted with CSCl2 to 5-chloro-4-isothiocyano-2,1,3-benzothiadiazole (II), which gives 4-[3-(2-aminoethyl)-2-thioureido]-5-chloro-2,1,3-benzothiadiazole (IV) with 1,2-diaminoethane (III). Cyclization in methanol in the presence of KOH/Pb(OAc)2 leads after 1 h at reflux to DS 103-282.

1 Neumann, P.; et al.; 4-(2-Imidazolin-2-ylamino)-2,1,3-benzothiadizoles. CH 579565 .
2 Becher, W.; Private Communication 2002, Abst 1520.
3 Unterhalt, B.; DS-103-282. Drugs Fut 1980, 5, 1, 27.
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) 32688 5-chloro-2,1,3-benzothiadiazol-4-amine; 5-chloro-2,1,3-benzothiadiazol-4-ylamine 30536-19-7 C6H4ClN3S 详情 详情
(II) 32689 5-chloro-4-isothiocyanato-2,1,3-benzothiadiazole; 5-chloro-2,1,3-benzothiadiazol-4-yl isothiocyanate C7H2ClN3S2 详情 详情
(III) 14754 ethylenediamine;1,2-Diaminoethane;ethane-1,2-diamine;1,2-Ethanediamine 107-15-3 C2H8N2 详情 详情
(IV) 32690 N-(2-aminoethyl)-N'-(5-chloro-2,1,3-benzothiadiazol-4-yl)thiourea C9H10ClN5S2 详情 详情
Extended Information