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【结 构 式】

【分子编号】26978

【品名】6,7-dichloro-3-nitro-2-naphthalenamine

【CA登记号】

【 分 子 式 】C10H6Cl2N2O2

【 分 子 量 】257.07532

【元素组成】C 46.72% H 2.35% Cl 27.58% N 10.9% O 12.45%

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:(III)

The hydrolysis of 6,7-dichloro-3-nitro-2-naphthoic acid ethyl ester (I) with NaOH in ethanol gives the expected free acid (II), which is treated with diphenylphosphoroazidate and triethylamine in DMF to yield 6,7-dichloro-3-nitro-2-naphthylamine (III). The reduction of (III) with H2 over RaNi in ehanol/ethyl acetate affords the corresponding diamine (IV), which is cyclized with thiocarbonyldi-imidazole (V) in refluxing benzene to give 6,7-dichloro-2,3-dihydro-1H-naphtho[2,3-d]imidazole-2-thione (VI). The methylation of (VI) with methyl iodide in dry DMF yields the corresponding methylsulfanyl derivative (VII), which is condensed with 1-O-acetyl-2,3,5-tri-O-ben-zoyl-beta-D-ribofuranose (VIII) by means of trimethylsilyl trifluoro-methanesulfonate (TMSOTf) and N,O-bis(trimethylsilyl)acetamide (BSA) in dichloromethane affording the benzoylated ribofuranoside (IX). The debenzoylation of (IX) with ammonia in methanol gives the free ribofuranoside (X), which is finally treated with Cl2/CCl4 in methanol to eliminate the methylsulfanyl group.

1 Zhu, Z.J.; et al.; Synthesis of 2,6, 7-trichloro-1-(beta-D-ribofuranosyl)naphtho[2, 3-d]imidazole: A linear dimensional analogue of the antiviral agent TCRB. J Org Chem 1998, 63, 4, 977.
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) 26976 ethyl 6,7-dichloro-3-nitro-2-naphthoate C13H9Cl2NO4 详情 详情
(II) 26977 6,7-dichloro-3-nitro-2-naphthoic acid C11H5Cl2NO4 详情 详情
(III) 26978 6,7-dichloro-3-nitro-2-naphthalenamine C10H6Cl2N2O2 详情 详情
(IV) 26979 3-amino-6,7-dichloro-2-naphthylamine C10H8Cl2N2 详情 详情
(V) 11990 Di(1H-imidazol-1-yl)methanethione; 1,1'-Thiocarbonyldiimidazole 6160-65-2 C7H6N4S 详情 详情
(VI) 26980 6,7-dichloro-1,3-dihydro-2H-naphtho[2,3-d]imidazole-2-thione C11H6Cl2N2S 详情 详情
(VII) 26981 6,7-dichloro-1H-naphtho[2,3-d]imidazol-2-yl methyl sulfide C12H8Cl2N2S 详情 详情
(VIII) 26984 (2R,3R,4R,5S)-5-(acetoxy)-4-(benzoyloxy)-2-[(benzoyloxy)methyl]tetrahydro-3-furanyl benzoate C28H24O9 详情 详情
(IX) 26982 (2R,3R,4R,5R)-4-(benzoyloxy)-2-[(benzoyloxy)methyl]-5-[6,7-dichloro-2-(methylsulfanyl)-1H-naphtho[2,3-d]imidazol-1-yl]tetrahydro-3-furanyl benzoate C38H28Cl2N2O7S 详情 详情
(X) 26983 (2R,3R,4S,5R)-2-[6,7-dichloro-2-(methylsulfanyl)-1H-naphtho[2,3-d]imidazol-1-yl]-5-(hydroxymethyl)tetrahydro-3,4-furandiol C17H16Cl2N2O4S 详情 详情
Extended Information