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【结 构 式】 
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【分子编号】50353 【品名】(E)-2-butenyl[bis[(1R,2R,5R)-2,6,6-trimethylbicyclo[3.1.1]hept-3-yl]]borane 【CA登记号】 |
【 分 子 式 】C24H41B 【 分 子 量 】340.40054 【元素组成】C 84.68% H 12.14% B 3.18% |
合成路线1
该中间体在本合成路线中的序号：(XXXIV)The condensation of 3-(tert-butyldimethylsilyloxy)propanal (XXXIII) with the chiral borane (XXXIV) by means of H2O2 and NaHCO3 gives the chiral alcohol (XXXV), which is oxidized with OsO4 and NaIO4 to yield the aldehyde (XXXVI). The Wittig condensation of (XXXVI) with phosphorane (XVI) affords the heptenoic ester (XXXVII), which is reduced with H2 over Pd/C to provide the saturated hydroxy ester (XXXVIII). The cyclization of (XXXVIII) by means of PPTS in refluxing dichloromethane gives the lactone (XXXIX), which by reaction with Cp2TiMe2 yields the methylene derivative (I).
| 【1】 Guzzupe, A.N.; et al.; Total synthesis of the epidermal growth factor inhibitor (-)-reveromycin B. J Org Chem 2001, 66, 7, 2382. |
| 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) | 41537 | tert-butyl(dimethyl)[2-[(2R,3S)-3-methyl-6-methylenetetrahydro-2H-pyran-2-yl]ethoxy]silane; tert-butyl(dimethyl)silyl 2-[(2R,3S)-3-methyl-6-methylenetetrahydro-2H-pyran-2-yl]ethyl ether | C15H30O2Si | 详情 | 详情 | |
| (XVI) | 14689 | Methyl (triphenylphosphoranylidene)acetate; (methoxycarbonylmethylene)triphenylphosphorane；Methyl 2-(triphenyl-lambda(5)-phosphanylidene)acetate | 2605-67-6 | C21H19O2P | 详情 | 详情 |
| (XXXIII) | 45546 | 3-[[tert-butyl(dimethyl)silyl]oxy]propanal | 570-24-1 | C9H20O2Si | 详情 | 详情 |
| (XXXIV) | 50353 | (E)-2-butenyl[bis[(1R,2R,5R)-2,6,6-trimethylbicyclo[3.1.1]hept-3-yl]]borane | C24H41B | 详情 | 详情 | |
| (XXXV) | 50354 | (3R,4S)-1-[[tert-butyl(dimethyl)silyl]oxy]-4-methyl-5-hexen-3-ol | C13H28O2Si | 详情 | 详情 | |
| (XXXVI) | 50355 | (2R,3R)-5-[[tert-butyl(dimethyl)silyl]oxy]-3-hydroxy-2-methylpentanal | C12H26O3Si | 详情 | 详情 | |
| (XXXVII) | 50356 | methyl (E,4S,5R)-7-[[tert-butyl(dimethyl)silyl]oxy]-5-hydroxy-4-methyl-2-heptenoate | C15H30O4Si | 详情 | 详情 | |
| (XXXVIII) | 50357 | methyl (4S,5R)-7-[[tert-butyl(dimethyl)silyl]oxy]-5-hydroxy-4-methylheptanoate | C15H32O4Si | 详情 | 详情 | |
| (XXXIX) | 50358 | (5S,6R)-6-(2-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-5-methyltetrahydro-2H-pyran-2-one | C14H28O3Si | 详情 | 详情 |