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【结 构 式】

【分子编号】41917

【品名】[(2R,3R,4R,5R)-4-hydroxy-3-[[methyl(dimethylene)-lambda(6)-sulfanyl]oxy]-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methyl benzoate

【CA登记号】

【 分 子 式 】C20H24N2O7S

【 分 子 量 】436.48584

【元素组成】C 55.04% H 5.54% N 6.42% O 25.66% S 7.35%

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:(XIII)

Finally this compound can be deprotected by conventional methods: (a) The acylation of 1,2-O-isopropylidene-alpha-D-xylofuranose (I) with benzoyl chloride and pyridine gives the 5-O-benzoyl derivative (II), which is acylated again with Ac2O in pyridine to yield the 3-O-acetyl-5-O-benzoyl derivative (III). The reaction of (III) with Ac2O in acetic acid affords the triacetyl derivative (IV) which is condensed with fully silylated thymine (V) by means of SnCl4 in acetone to provide the corresponding adduct (VI). The selective hydrolysis of the acetate groups of (VI) with sulfuric acid in hot acetonitrile gives 1-(5-O-benzoyl-beta-D-xylofuranosyl)thymine (VII), which is treated with MsCl and pyridine to yield the dimesylate (VIII). The reaction of (VIII) with NaI in refluxing dimethoxyethane affords, after column chromatography, 5'-O-benzoyl-3'-deoxy-2',3'-dideoxythymidine (IX), which is finally deprotected with NaOMe in methanol. (b) The reaction of the 5-O-benzoyl derivative (II) with MsCl and pyridine gives the mesylate (X), which is acylated with Ac2O in HOAc to yield 1,2-di-O-acetyl-5-O-benzoyl-3-O-(methylsulfonyl)-alpha-D-xylofuranose (XI). The condensation of (XI) with the fully silylated thymine (V) by means of SnCl4 in acetone affords the expected adduct (XII), which is treated with H2SO4 in hot MeCN to provide 1-(5'-O-benzoyl-3'-O-(methylsulfonyl)-beta-D-xylofuranosyl)thymine (XIII). Finally this compound is treated with MsCl and pyridine to yield the dimesylate (VIII), already reported. (c) The 1-(5-O-benzoyl-beta-D-xylofuranosyl)thymine (VII) can also be treated with TsCl and pyridine to give the ditosylate (XIV), which is then treated with NaI in refluxing dimethoxyethane to yield 5'-O-benzoyl-3'-deoxy-2',3'-dideoxythymidine (IX), already reported.

1 Spirikhin, L.V.; Mustafin, A.G.; Tolstikov, G.A.; Abdrakhumanov, L.B.; Gataullin, R.R.; Transformations of beta-D-xylofuranosyl nucleosides. Synthesis of 3'-deoxy-2,3-didehydrothymidine (D4T). Russian J Org Chem 1996, 32, 12, 1787.
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) 41907 (3aR,5R,6S,6aR)-5-(hydroxymethyl)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-6-ol 20031-21-4 C8H14O5 详情 详情
(II) 41908 [(3aR,5R,6S,6aR)-6-hydroxy-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl]methyl benzoate C15H18O6 详情 详情
(III) 41909 [(3aR,5R,6S,6aR)-6-(acetoxy)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl]methyl benzoate C17H20O7 详情 详情
(IV) 41910 [(2R,3S,4R,5R)-3,4,5-tris(acetoxy)tetrahydro-2-furanyl]methyl benzoate C18H20O9 详情 详情
(V) 41900 5-methyl-2,4-bis[(trimethylsilyl)oxy]pyrimidine; 5-methyl-2-[(trimethylsilyl)oxy]-4-pyrimidinyl trimethylsilyl ether 7288-28-0 C11H22N2O2Si2 详情 详情
(VI) 41911 [(2R,3S,4R,5R)-3,4-bis(acetoxy)-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methyl benzoate C21H22N2O9 详情 详情
(VII) 41912 [(2R,3R,4R,5R)-3,4-dihydroxy-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methyl benzoate C17H18N2O7 详情 详情
(VIII) 41913 [(2R,3S,4R,5R)-3,4-bis[[methyl(dimethylene)-lambda(6)-sulfanyl]oxy]-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methyl benzoate C23H30N2O7S2 详情 详情
(IX) 12254 [(2S,5R)-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]-2,5-dihydro-2-furanyl]methyl benzoate C17H16N2O5 详情 详情
(X) 41914 ((3aR,5R,6S,6aR)-2,2-dimethyl-6-[[methyl(dimethylene)-lambda(6)-sulfanyl]oxy]tetrahydrofuro[2,3-d][1,3]dioxol-5-yl)methyl benzoate C18H24O6S 详情 详情
(XI) 41915 ((2R,3S,4R,5R)-4,5-bis(acetoxy)-3-[[methyl(dimethylene)-lambda(6)-sulfanyl]oxy]tetrahydro-2-furanyl)methyl benzoate C19H24O8S 详情 详情
(XII) 41916 [(2R,3S,4R,5R)-4-(acetoxy)-3-[[methyl(dimethylene)-lambda(6)-sulfanyl]oxy]-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methyl benzoate C22H26N2O8S 详情 详情
(XIII) 41917 [(2R,3R,4R,5R)-4-hydroxy-3-[[methyl(dimethylene)-lambda(6)-sulfanyl]oxy]-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]tetrahydro-2-furanyl]methyl benzoate C20H24N2O7S 详情 详情
(XIV) 41918 ((2R,3S,4R,5R)-5-[5-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]-3,4-bis[[(4-methylphenyl)sulfonyl]oxy]tetrahydro-2-furanyl)methyl benzoate C31H30N2O11S2 详情 详情
Extended Information