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【结 构 式】

【分子编号】20910

【品名】diethyl 2-[[[2-(acetoxy)acetyl]sulfanyl](2,3,4-trifluoroanilino)methylene]malonate

【CA登记号】

【 分 子 式 】C18H18F3NO7S

【 分 子 量 】449.4046696

【元素组成】C 48.11% H 4.04% F 12.68% N 3.12% O 24.92% S 7.14%

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:(VII)

The reaction of 2,3,4-trifluoroaniline (I) with carbon disulfide and triethylamine gives triethylammonium N-(2,3,4-trifluorophenyl)dithiocarbamate (II), which by reaction with ethyl chlorocarbonate in chloroform yields the corresponding isothiocyanate (III). The condensation of (III) with diethyl malonate (IV) by means of NaH in THF affords the sodium salt of diethyl [(2,3,4-trifluoroanilino)(mercapto)methylene]malonate (V), which is condensed with 1-acetoxy-3-chloroacetone in DMF to give the substituted thioester (VII). The cyclization of (VII) by means of sulfuric acid yields the thiazoline derivative (VIII), which is cyclized again by means of NaH in refluxing dioxane to afford diethyl (6,7-difluoro-1H,4H-thiazolo[4,3-c][1,4]benzoxazin-1-ylidene)malonate (IX). A final, new cyclization of (IX) by means of ethyl polyphosphate (PPE) at 138 C, followed by hydrolysis of the intermediate ester with sulfuric acid gives 7,8-difluoro-9,1-epoxymethano-5-oxo-5H-thiazolo[3,2-a]quinoline-4-carboxylic acid (X). This compound is then condensed with 1-methylpiperazine (XI) in hot DMSO and treated with aqueous HCl.

1 Taguchi, M.; Kondo, H.; Inoue, Y.; Kawahata, Y.; Tsukamoto, G. (Kanebo Pharmaceuticals, Ltd.); Quinolinecarboxylic acid derivs., a compsns. comprising the same, process for preparing the same, and the use of the same for the manufacture of medicaments. EP 0286089; JP 1989199979; US 4808584 .
2 Prous, J.; Castaner, J.; KB-5246. Drugs Fut 1989, 14, 6, 519.
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) 13059 2,3,4-Trifluorophenylamine; 2,3,4-Trifluoroaniline 3862-73-5 C6H4F3N 详情 详情
(II) 20905 N,N-dipropyl-1-propanaminium 2,3,4-trifluorophenylcarbamodithioate C16H25F3N2S2 详情 详情
(III) 20906 1,2,3-trifluoro-4-isothiocyanatobenzene; 2,3,4-trifluorophenyl isothiocyanate 119474-40-7 C7H2F3NS 详情 详情
(IV) 16829 Diethyl malonate 105-53-3 C7H12O4 详情 详情
(V) 20908 sodium 3-ethoxy-2-(ethoxycarbonyl)-3-oxo-1-(2,3,4-trifluoroanilino)-1-propene-1-thiolate C14H13F3NNaO4S 详情 详情
(VI) 20909 4-chloro-3-oxobutyl acetate C6H9ClO3 详情 详情
(VII) 20910 diethyl 2-[[[2-(acetoxy)acetyl]sulfanyl](2,3,4-trifluoroanilino)methylene]malonate C18H18F3NO7S 详情 详情
(VIII) 20911 diethyl 2-[4-(hydroxymethyl)-3-(2,3,4-trifluorophenyl)-1,3-thiazol-2(3H)-ylidene]malonate C17H16F3NO5S 详情 详情
(IX) 13066 diethyl 2-(6,7-difluoro-4H-[1,3]thiazolo[4,3-c][1,4]benzoxazin-1-ylidene)malonate C17H15F2NO5S 详情 详情
(X) 13068 5,6-Difluoro-8-oxo-3H,8H-4-oxa-1-thia-9b-azacyclopenta[cd]phenalene-9-carboxylic acid C13H5F2NO4S 详情 详情
(XI) 10061 1-Methylpiperazine; 1-Methyl piperazine; N-Methylpiperazine 109-01-3 C5H12N2 详情 详情
Extended Information