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【结 构 式】

【分子编号】53494

【品名】7-(benzyloxy)-6-{[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl]oxy}-2H-chromen-2-one

【CA登记号】n/a

【 分 子 式 】C22H22O9

【 分 子 量 】430.41128

【元素组成】C 61.39% H 5.15% O 33.46%

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:(VIII)

The acetylation of N-acetyl-D-glucosamine (I) with Ac2O and pyridine gives the tetraacetoxy derivative (II), which is treated with dry HCl in acetic anhydride to yield 2-acetamido-3,4,6-tri-O-acetyl-1-chloro-2-deoxy-alpha-D-glucopyranose (III). The condensation of (III) with 7-benzyloxy-6-hydroxy-2H-1-benzopyran-2-one (IV) by means of NaOH and benzyl triethylammonium chloride in chloroform affords the acetylated glucoside (V), which is selectively deacetylated with NaOMe in hot methanol to provide the benzyl protected glucoside (VI). Finally, this compound is debenzylated by hydrogenation with H2 over Pd/C in dimethoxyethane/water to furnish the target glycoside. The intermediate 7-benzyloxy-6-hydroxy-2H-1-benzopyran-2-one (IV) is obtained as follows: The reaction of Esculein (VII) with benzyl chloride, K2CO3, KI and 18-C-6 in hot DMF gives 7-benzyloxy-6-(D-glucopyranosyloxy)-2H-1-benzopyran-2-one (VIII), which is finally deglycosylated by means of HCl in methanol to afford the target intermediate (IV).

1 Watanabe, K.; Niimura, K.; Miyagawa, J. (Kureha Chemical Industry Co. Ltd.); Esculetin derivs. and method for manufacture thereof, use thereof, and pharmaceutical compsn.. EP 0654479; JP 1995179490; US 5736522 .
2 Watanabe, K.; Niimura, K.; Yamazaki, T.; Maruoka, H. (Kureha Chemical Industry Co. Ltd.); Esculetin derivs., method for manufacture thereof, and pharmaceutical compsn.. CA 2166168; EP 0719770; JP 1996183785; US 5731293 .
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) 21967 N-[(2S,3R,4R,5S,6R)-2,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-3-yl]acetamide C8H15NO6 详情 详情
(II) 53489 (2R,3R,4R,5R,6R)-3-(acetylamino)-2,5-bis(acetyloxy)-6-[(acetyloxy)methyl]tetrahydro-2H-pyran-4-yl acetate n/a C16H23NO10 详情 详情
(III) 21968 (2R,3R,4R,5S,6R)-3-(acetamido)-5-(acetoxy)-6-[(acetoxy)methyl]-2-chlorotetrahydro-2H-pyran-4-yl acetate 3068-34-6 C14H20ClNO8 详情 详情
(IV) 53490 7-Benzyl-O-esculetin; Esculetin-7-benzyl ether; 6,7-Dihydroxycoumarin-7-benzyl ether 895-61-4 C16H12O4 详情 详情
(V) 53491 (2R,3R,4R,5R,6S)-5-(acetylamino)-4-(acetyloxy)-2-[(acetyloxy)methyl]-6-{[7-(benzyloxy)-2-oxo-2H-chromen-6-yl]oxy}tetrahydro-2H-pyran-3-yl acetate n/a C30H31NO12 详情 详情
(VI) 53492 N-[(2S,3R,4R,5S,6R)-2-{[7-(benzyloxy)-2-oxo-2H-chromen-6-yl]oxy}-4,5-dihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-3-yl]acetamide n/a C24H25NO9 详情 详情
(VII) 53493 7-hydroxy-6-{[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl]oxy}-2H-chromen-2-one n/a C15H16O9 详情 详情
(VIII) 53494 7-(benzyloxy)-6-{[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl]oxy}-2H-chromen-2-one n/a C22H22O9 详情 详情
Extended Information