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【结 构 式】 
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【分子编号】47849 【品名】tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-[2-oxo-3-[4-oxo-3(4H)-quinazolinyl]propyl]-1-piperidinecarboxylate 【CA登记号】 |
【 分 子 式 】C27H41N3O5Si 【 分 子 量 】515.72526 【元素组成】C 62.88% H 8.01% N 8.15% O 15.51% Si 5.45% |
合成路线1
该中间体在本合成路线中的序号：(XXII)After protection of (XVI) as the N-Boc derivative (XVII), the diol function was cyclized to epoxide (XIX) by treatment with N-tosyl imidazole (XVIII) in the presence of NaH. Epoxide (XIX) opening with the potassium salt of 4-quinazolinone (XX) gave alcohol (XXI). Subsequent Dess-Martin oxidation of (XXI) yielded the epimeric mixture of ketones (XXII). Acid hydrolysis of this mixture furnished the title trans-piperidine along with the cis-isomer, which was isolated in the cyclic hemiacetal form (XXIII). The title compound was also obtained by isomerization of (XXIII) in refluxing MeOH).
| 【1】 Ooi, H.e; et al.; A concise enantioselective synthesis of antimalarial febrifugine alkaloids. Org Lett 2001, 3, 6, 953. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XVI) | 47844 | 3-((3S)-3-[[tert-butyl(diphenyl)silyl]oxy]piperidinyl)-1,2-propanediol | C24H35NO3Si | 详情 | 详情 | |
| (XVII) | 47845 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-(2,3-dihydroxypropyl)-1-piperidinecarboxylate | C19H39NO5Si | 详情 | 详情 | |
| (XVIII) | 47846 | 1-[(4-methylphenyl)sulfonyl]-1H-imidazole | 2232-08-8 | C10H10N2O2S | 详情 | 详情 |
| (XIX) | 47847 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-(2-oxiranylmethyl)-1-piperidinecarboxylate | C19H37NO4Si | 详情 | 详情 | |
| (XX) | 14634 | 4(3H)-quinazolinone | C8H6N2O | 详情 | 详情 | |
| (XXI) | 47848 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-[2-hydroxy-3-[4-oxo-3(4H)-quinazolinyl]propyl]-1-piperidinecarboxylate | C27H43N3O5Si | 详情 | 详情 | |
| (XXII) | 47849 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-[2-oxo-3-[4-oxo-3(4H)-quinazolinyl]propyl]-1-piperidinecarboxylate | C27H41N3O5Si | 详情 | 详情 | |
| (XXIII) | 38272 | 3-[[(3aS,7aS)-2-hydroxyoctahydrofuro[3,2-b]pyridin-2-yl]methyl]-4(3H)-quinazolinone | C16H19N3O3 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(XXII)After protection of (XVI) as the N-Boc derivative (XVII), the diol function was cyclized to epoxide (XIX) by treatment with N-tosyl imidazole (XVIII) in the presence of NaH. Epoxide (XIX) opening with the potassium salt of 4-quinazolinone (XX) gave alcohol (XXI). Subsequent Dess-Martin oxidation of (XXI) yielded the epimeric mixture of ketones (XXII). Acid hydrolysis of this mixture furnished the trans-piperidine (XXIII) along with the title cis-isomer, which was isolated in the cyclic hemiacetal form.
| 【1】 Ooi, H.e; et al.; A concise enantioselective synthesis of antimalarial febrifugine alkaloids. Org Lett 2001, 3, 6, 953. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XVI) | 47844 | 3-((3S)-3-[[tert-butyl(diphenyl)silyl]oxy]piperidinyl)-1,2-propanediol | C24H35NO3Si | 详情 | 详情 | |
| (XVII) | 47845 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-(2,3-dihydroxypropyl)-1-piperidinecarboxylate | C19H39NO5Si | 详情 | 详情 | |
| (XVIII) | 47846 | 1-[(4-methylphenyl)sulfonyl]-1H-imidazole | 2232-08-8 | C10H10N2O2S | 详情 | 详情 |
| (XIX) | 47847 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-(2-oxiranylmethyl)-1-piperidinecarboxylate | C19H37NO4Si | 详情 | 详情 | |
| (XX) | 14634 | 4(3H)-quinazolinone | C8H6N2O | 详情 | 详情 | |
| (XXI) | 47848 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-[2-hydroxy-3-[4-oxo-3(4H)-quinazolinyl]propyl]-1-piperidinecarboxylate | C27H43N3O5Si | 详情 | 详情 | |
| (XXII) | 47849 | tert-butyl (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-[2-oxo-3-[4-oxo-3(4H)-quinazolinyl]propyl]-1-piperidinecarboxylate | C27H41N3O5Si | 详情 | 详情 | |
| (XXIII) | 47850 | 3-[3-[(2R,3S)-3-hydroxypiperidinyl]-2-oxopropyl]-4(3H)-quinazolinone | C16H19N3O3 | 详情 | 详情 |