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【结 构 式】 
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【分子编号】49209 【品名】N-(trimethylsilyl)-N-[7-(trimethylsilyl)-7H-purin-6-yl]benzamide 【CA登记号】 |
【 分 子 式 】C18H25N5OSi2 【 分 子 量 】383.6006 【元素组成】C 56.36% H 6.57% N 18.26% O 4.17% Si 14.64% |
合成路线1
该中间体在本合成路线中的序号：(X)The enantioselective epoxidation of allyl alcohol (I) with 2-phenylisopropyl hydroperoxide (II) and Ti(iPrO)4 in the presence of D-diisopropyl tartrate gives the chiral epoxide (III), which is esterified with pivaloyl chloride to yield the pivalate (IV). The opening of the epoxide ring of (IV) by means of lithium acetylide (V) and BF3/Et2O affords the alkynyl alcohol (VI), which is cyclized by means of Mo(CO)6 and trimethylamine oxide to provide the chiral dihydrofuran (VII). The oxidation of (VII) with OsO4 and 4-methylmorpholine-N-oxide (NMMO) gives the diol (VIII), which is treated with Ac2O to yield the diacetate (IX). The condensation of (IX) with N6-benzoyl-N6,7-bis(trimethylsilyl)adenine (X) by means of Tms-OTf affords the nucleoside (XI). Finally, this compound is deprotected by means of NaOMe in methanol.
| 【1】 Gleason, M.M.; McDonald, F.E.; Asymmetric synthesis of nucleosides via molybdenum-catalyzed alkynol cycloisomerization coupled with stereoselective glycosylations of deoxyfuranose glycals and 3-amidofuranose glycals. J Am Chem Soc 1996, 118, 28, 6648. |
| 【2】 Gleason, M.M.; McDonald, F.E.; Asymmetric syntheses of stavudine (d4T) and cordycepin by cycloisomerization of alkynyl alcohols to endocyclic enol ethers. Angew Chem. Int Ed Engl 1995, 34, 3, 350. |
| 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) | 12234 | 2-Propen-1-ol; Allyl alcohol | 107-18-6 | C3H6O | 详情 | 详情 |
| (II) | 49206 | alpha,alpha-Dimethylbenzyl hydroperoxide; Cumyl hydroperoxide; Cumene Hydroperoxide | 80-15-9 | C9H12O2 | 详情 | 详情 |
| (III) | 16260 | (R)-(+)-Glycidol; (2R)-Oxiranemethanol; (2R)oxiranylmethanol | 57044-25-4 | C3H6O2 | 详情 | 详情 |
| (IV) | 12235 | (2S)oxiranylmethyl pivalate | C8H14O3 | 详情 | 详情 | |
| (V) | 17461 | ethynyllithium | C2HLi | 详情 | 详情 | |
| (VI) | 12260 | diethyl 2-(2,4,5-trifluoro-3-methoxybenzoyl)malonate | C15H15F3O6 | 详情 | 详情 | |
| (VII) | 12226 | (2S)-2,3-dihydro-2-furanylmethyl pivalate | C10H16O3 | 详情 | 详情 | |
| (VIII) | 49207 | [(2S,4R,5R)-4,5-dihydroxytetrahydro-2-furanyl]methyl pivalate | C10H18O5 | 详情 | 详情 | |
| (IX) | 49208 | [(2S,4R,5S)-4,5-bis(acetoxy)tetrahydro-2-furanyl]methyl pivalate | C14H22O7 | 详情 | 详情 | |
| (X) | 49209 | N-(trimethylsilyl)-N-[7-(trimethylsilyl)-7H-purin-6-yl]benzamide | C18H25N5OSi2 | 详情 | 详情 | |
| (XI) | 49210 | [(2S,4R,5R)-4-(acetoxy)-5-[6-(benzoylamino)-9H-purin-9-yl]tetrahydro-2-furanyl]methyl pivalate | C24H27N5O6 | 详情 | 详情 |