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【结 构 式】 
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【分子编号】53750 【品名】4-methyl-1-penten-3-one 【CA登记号】1606-47-9 |
【 分 子 式 】C6H10O 【 分 子 量 】98.1448 【元素组成】C 73.43% H 10.27% O 16.3% |
合成路线1
该中间体在本合成路线中的序号：(LXIX)In a synthetic route starting from dehydroepiandrosterone (LXVI), Wittig reaction of ketone (LXVI) with ethyl triphenylphosphonium bromide (LXVII) and potassium tert-butoxide gave the C-17 ethylidene derivative (LXVIII). Condensation of (LXVIII) with isopropyl vinyl ketone (LXIX) in the presence of dimethylaluminum chloride, followed by catalytic hydrogenation over Pt/C, yielded (LV), which was then converted into ethylene ketal (LVI). Catalytic hydrogenation of (LVI) gave compound (LXX), whose acetate ester was hydrolyzed to afford alcohol (LXXI). Oxidation of (LXXI) by means of chromic acid furnishes ketone (LXXII), from which intermediate (LX) was obtained by introduction of the 7-alpha hydroxyl group by means of microbiological oxidation employing several microorganism strains.
| 【1】 Moriarty, R.M.; Guo, L.; Tuladhar, S.M. (Genaera Corp.); Chemical synthesis of squalamine. WO 9419366 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (LV) | 53712 | (3S,8S,9S,10R,13R,14S,17R)-17-[(1R)-1,5-dimethyl-4-oxohexyl]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate | n/a | C29H46O3 | 详情 | 详情 |
| (LVI) | 53739 | (3S,8S,9S,10R,13R,14S,17R)-17-[(1R)-3-(2-isopropyl-1,3-dioxolan-2-yl)-1-methylpropyl]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate | n/a | C31H50O4 | 详情 | 详情 |
| (LX) | 53754 | (3S,8S,9S,10R,13S,14S,17S)-10,13-dimethyl-17-(2-methyl-1,3-dioxolan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate | n/a | C25H38O4 | 详情 | 详情 |
| (LXVI) | 20083 | Prasterone acetate;3b-Hydroxy-5-androstene-17-one acetate；Dehydroisoandrosterone acetate;Dehydroepiandrosterone 3-acetate;Dehydroepiandrosterone acetate;(3S,8R,9S,10R,13S,14S)-10,13-dimethyl-17-oxo-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate | 853-23-6 | C21H30O3 | 详情 | 详情 |
| (LXVII) | 11717 | Ethyl(triphenyl)phosphonium bromide; (Ethyl)triphenylphosphonium bromide | 1530-32-1 | C20H20BrP | 详情 | 详情 |
| (LXVIII) | 53749 | (3S,8S,9S,10R,13S,14S)-17-[(E)ethylidene]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate | n/a | C23H34O2 | 详情 | 详情 |
| (LXIX) | 53750 | 4-methyl-1-penten-3-one | 1606-47-9 | C6H10O | 详情 | 详情 |
| (LXX) | 53751 | (3S,5S,8R,9S,10S,13R,14S,17R)-17-[(1R)-3-(2-isopropyl-1,3-dioxolan-2-yl)-1-methylpropyl]-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate | n/a | C31H52O4 | 详情 | 详情 |
| (LXXI) | 53752 | (3S,5S,8R,9S,10S,13R,14S,17R)-17-[(1R)-3-(2-isopropyl-1,3-dioxolan-2-yl)-1-methylpropyl]-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-ol | n/a | C29H50O3 | 详情 | 详情 |
| (LXXII) | 53753 | (5S,8R,9S,10S,13R,14S,17R)-17-[(1R)-3-(2-isopropyl-1,3-dioxolan-2-yl)-1-methylpropyl]-10,13-dimethylhexadecahydro-3H-cyclopenta[a]phenanthren-3-one | n/a | C29H48O3 | 详情 | 详情 |