• English
  • 简体中文
Login Register
Current Location: Home > Feedback Help Print

【结 构 式】

【药物名称】Ofloxacin, Hoe-280, DL-8280, Exocin, Exocine, Ocuflox, Floxin, Tarivid

【化学名称】(±)-9-Fluoro-3-methyl-10-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid

【CA登记号】82419-36-1

【 分 子 式 】C18H20FN3O4

【 分 子 量 】361.3762

【开发单位】Daiichi Pharmaceutical (Originator), Allergan (Licensee), Aventis Pharma (Licensee), Ortho-McNeil (Licensee), Santen (Licensee)

【药理作用】Antibacterial Drugs, Antibacterial Ophthalmic Drugs, ANTIINFECTIVE THERAPY, Ocular Antiinflammatory and Antiinfective Agents, OCULAR MEDICATIONS, Ophthalmic Drugs, Quinolones

合成路线1

The partial hydrolysis ot 2,3,4-trifluoronitrobenzene (I) with KOH in DMSO gives 2,3-difluoro-6-nitrophenol (II), which by condensation with chloroacetone (III) by means of K2CO3 - KI in refluxing acetone yields 2-acetonyloxy-3,4-difluoronitrobenzene (IV). The reductive cyclization of (IV) with H2 over Raney-Ni in ethanol affords 7,8-difluoro-2,3-dihydro-3-methyl-4H-benzoxazine (V), which is condensed with diethyl ethoxymethylenemalonate (VI) by heating at 145 C giving the malonic derivative (VII). The cyclization of (VII) by heating at 145 C with ethyl polyphosphate (PPE) yields ethyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylate (VIII), which is hydrolyzed with HCl in refluxing acetic acid affording the corresponding free acid (IX). Finally, this compound is condensed with N-methylpiperazine (X) in DMSO at 110 C.

1 Hayakawa, I.; Hiramitsu, T.; Tanaka, Y. (Daiichi Pharmaceutical Co., Ltd.); Benzoxazine derivs.. EP 0047005; US 4382892 .
2 Serradell, M.N.; Blancafort, P.; Castaner, J.; DL-8280. Drugs Fut 1983, 8, 5, 395.
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) 30677 1,2,3-trifluoro-4-nitrobenzene; 2,3,4-trifluoronitrobenzene 771-69-7 C6H2F3NO2 详情 详情
(II) 30678 2,3-difluoro-6-nitrophenol 82419-26-9 C6H3F2NO3 详情 详情
(III) 15288 1-Chloroacetone; Chloroacetone 78-95-5 C3H5ClO 详情 详情
(IV) 30679 1-(2,3-difluoro-6-nitrophenoxy)acetone C9H7F2NO4 详情 详情
(V) 30680 7,8-difluoro-3-methyl-3,4-dihydro-2H-1,4-benzoxazine C9H9F2NO 详情 详情
(VI) 14088 Diethyl ethoxymethylenemalonate; Diethyl 2-(ethoxymethylene)malonate 87-13-8 C10H16O5 详情 详情
(VII) 30681 diethyl 2-[(7,8-difluoro-3-methyl-2,3-dihydro-4H-1,4-benzoxazin-4-yl)methylene]malonate C17H19F2NO5 详情 详情
(VIII) 30682 ethyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate C15H13F2NO4 详情 详情
(IX) 12058 9,10-Difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid; 8,9-Difluoro-3-me-6-oxo-2,3-dihydro-6h-1-oxa-3a-aza-phenalene-5-carboxylic acid 82419-35-0 C13H9F2NO4 详情 详情
(X) 10061 1-Methylpiperazine; 1-Methyl piperazine; N-Methylpiperazine 109-01-3 C5H12N2 详情 详情
Extended Information