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【结 构 式】 
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【药物名称】SB-T-1250 【化学名称】[2aR-[2alpha,4beta,4abeta,6beta,9alpha(2R,3S),11beta,12alpha,12aalpha,12balpha]]-6,12b-Diacetoxy-12-benzoyloxy-9-[3-(tert-butoxycarbonylamino)-3-[2,2-dimethyl-1(R)-cyclopropyl]-2-hydroxypropionyloxy]-4,11-dihydroxy-4a,8,13,13-tetramethyl-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benz[1,2-b]oxet-5-one 【CA登记号】 【 分 子 式 】C44H59NO15 【 分 子 量 】841.95853 |
【开发单位】Roswell Park Memorial Inst. (Originator), State University of New York,Stony Brook (Originator) 【药理作用】Antimitotic Drugs, Microtubule-Stabilizing Agents, Taxanes |
合成路线1
Lithium enolate (II), generated from chiral ester (I) and LDA at -84 C, was cyclocondensed with imine (III) to furnish azetidinone (IV). After removal of the triisopropylsilyl group of (IV) using HF in pyridine, the resulting lactam was treated with CH2I2 and Et2Zn in 1,2-dichloroethane to give the dimethylcyclopropyl azetidinone (V). The C-3 hydroxyl group was reprotected as the triisopropylsilyl ether (VI). Then, the N-p-methoxyphenyl group of (VI) was removed by oxidative treatment with ceric ammonium nitrate at -10 C, and the resulting azetidinone was N-protected with Boc2O to afford tert-butyl carbamate (VII).
| 【1】 Lin, S.; et al.; Syntheses and biological activity of advanced second-generation taxoids. 216th ACS Natl Meet (Aug. 23-27, Boston) 1998, Abst MEDI 315. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (II) | 21730 | 2-(Triisopropylsilyloxy)-1-(2(S)-phenyl-1(R)-cyclohexyl)vinyl-1-ol lithium salt | C23H37LiO3Si | 详情 | 详情 | |
| (IV) | 21732 | (3R,4S)-1-(4-methoxyphenyl)-4-[(E)-1-propenyl]-3-[(triisopropylsilyl)oxy]-2-azetidinone | C22H35NO3Si | 详情 | 详情 | |
| (V) | 21741 | (3R,4S)-4-[(1S)-2,2-dimethylcyclopropyl]-3-hydroxy-1-(4-methoxyphenyl)-2-azetidinone | C15H19NO3 | 详情 | 详情 | |
| (VI) | 21742 | (3R,4S)-4-[(1S)-2,2-dimethylcyclopropyl]-1-(4-methoxyphenyl)-3-[(triisopropylsilyl)oxy]-2-azetidinone | C24H39NO3Si | 详情 | 详情 | |
| (VII) | 21743 | tert-butyl (2S,3R)-2-[(1S)-2,2-dimethylcyclopropyl]-4-oxo-3-[(triisopropylsilyl)oxy]-1-azetidinecarboxylate | C22H41NO4Si | 详情 | 详情 |
合成路线2
The C-7 hydroxyl group of 10-deacetyl baccatin III (VIII) was selectively protected with triethylsilyl chloride and imidazole to yield silyl ether (IX). Subsequent selective acetylation of (IX) at C-10 hydroxyl group with acetyl chloride in the presence of LiN(SiMe3)2 afforded ester (X). The title taxoid was then obtained by further coupling of (X) with b-lactam (VII) using LiN(SiMe3)2 in THF at low temperature, followed by desilylation with HF in pyridine.
| 【1】 Lin, S.; et al.; Syntheses and biological activity of advanced second-generation taxoids. 216th ACS Natl Meet (Aug. 23-27, Boston) 1998, Abst MEDI 315. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (VII) | 21743 | tert-butyl (2S,3R)-2-[(1S)-2,2-dimethylcyclopropyl]-4-oxo-3-[(triisopropylsilyl)oxy]-1-azetidinecarboxylate | C22H41NO4Si | 详情 | 详情 | |
| (VIII) | 10467 | (1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-(acetoxy)-1,9,12,15-tetrahydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate | 32981-86-5 | C29H36O10 | 详情 | 详情 |
| (IX) | 21737 | (1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-(acetoxy)-1,12,15-trihydroxy-10,14,17,17-tetramethyl-11-oxo-9-[(triethylsilyl)oxy]-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate | C35H50O10Si | 详情 | 详情 | |
| (X) | 10473 | (1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetoxy)-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-9-[(triethylsilyl)oxy]-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate | C37H52O11Si | 详情 | 详情 |