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【结 构 式】

【分子编号】52838

【品名】tert-butyl(dimethyl){[(E)-4-(tributylstannyl)-3-pentenyl]oxy}silane; tert-butyl(dimethyl)silyl (E)-4-(tributylstannyl)-3-pentenyl ether

【CA登记号】

【 分 子 式 】C23H50OSiSn

【 分 子 量 】489.4449

【元素组成】C 56.44% H 10.3% O 3.27% Si 5.74% Sn 24.25%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XI)

Lithiation of dihydrofuran (VIII), followed by the addition of tributylstannyllithium, gave an intermediate (IX) that was quenched with methyl iodide to produce alcohol (X). Silylation of alcohol (X) with tert-butyl dimethylsilyl chloride then gave silyl ether (XI). Copper-catalyzed conjugate addition of the organolithium reagent derived from (XI) to the intermediate enone (VII), with subsequent enolate trapping with triethylsilyl chloride, afforded adduct (XII) as the major diastereoisomer. Epoxidation of the silyl enol ether (XII) with m-chloroperbenzoic acid, followed by selective desilylation using tetrabutylammonium fluoride/ammonium chloride, gave rise to hydroxy ketone (XIII). Methylation of (XIII) in the presence of silver oxide yielded methyl ether (XIV). Then, the keto group of (XIV) was stereoselectively reduced to (XV) employing L-selectride. After protection of the hydroxyl group of (XV) as the benzoate ester, simultaneous deprotection of the ketal and silyl ether functions under acidic conditions provided triol (XVI). Oxidative cleavage of the 1,2-diol moiety of (XVI) with NaIO4 gave ketone (XVII). This was converted to epoxide (XVIII) by stereoselective addition of in situ generated trimethylsulfoxonium ylide.

1 Taber, D.F.; et al.; Synthesis of (-)-fumagillin. J Am Chem Soc 1999, 121, 23, 5589.
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) 52835 (5S)-2,2-dimethyl-1,3-dioxaspiro[4.5]dec-6-en-8-one C10H14O3 详情 详情
(VIII) 22766 2,3-dihydrofuran 1191-99-7 C4H6O 详情 详情
(IX) 52836 [(E)-4-oxido-1-(tributylstannyl)-1-butenyl]lithium C16H32LiOSn 详情 详情
(X) 52837 (E)-4-(tributylstannyl)-3-penten-1-ol C17H36OSn 详情 详情
(XI) 52838 tert-butyl(dimethyl){[(E)-4-(tributylstannyl)-3-pentenyl]oxy}silane; tert-butyl(dimethyl)silyl (E)-4-(tributylstannyl)-3-pentenyl ether C23H50OSiSn 详情 详情
(XII) 52839 tert-butyl(dimethyl)silyl (E)-4-{(5S,6R)-2,2-dimethyl-8-[(triethylsilyl)oxy]-1,3-dioxaspiro[4.5]dec-7-en-6-yl}-3-pentenyl ether; tert-butyl[((E)-4-{(5S,6R)-2,2-dimethyl-8-[(triethylsilyl)oxy]-1,3-dioxaspiro[4.5]dec-7-en-6-yl}-3-pentenyl)oxy]dimethylsilane C27H52O4Si2 详情 详情
(XIII) 52840 (5S,6S,7S)-6-((E)-4-{[tert-butyl(dimethyl)silyl]oxy}-1-methyl-1-butenyl)-7-hydroxy-2,2-dimethyl-1,3-dioxaspiro[4.5]decan-8-one C21H38O5Si 详情 详情
(XIV) 52841 (5S,6S,7S)-6-((E)-4-{[tert-butyl(dimethyl)silyl]oxy}-1-methyl-1-butenyl)-7-methoxy-2,2-dimethyl-1,3-dioxaspiro[4.5]decan-8-one C22H40O5Si 详情 详情
(XV) 52842 (5S,6S,7S,8R)-6-((E)-4-{[tert-butyl(dimethyl)silyl]oxy}-1-methyl-1-butenyl)-7-methoxy-2,2-dimethyl-1,3-dioxaspiro[4.5]decan-8-ol C22H42O5Si 详情 详情
(XVI) 52843 (1R,2S,3S,4S)-4-hydroxy-4-(hydroxymethyl)-3-[(E)-4-hydroxy-1-methyl-1-butenyl]-2-methoxycyclohexyl benzoate C20H28O6 详情 详情
(XVII) 52844 (1R,2S,3S)-3-[(E)-4-hydroxy-1-methyl-1-butenyl]-2-methoxy-4-oxocyclohexyl benzoate C19H24O5 详情 详情
(XVIII) 52845 (3R,4S,5S,6R)-4-[(E)-4-hydroxy-1-methyl-1-butenyl]-5-methoxy-1-oxaspiro[2.5]oct-6-yl benzoate C20H26O5 详情 详情
Extended Information