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【结 构 式】

【分子编号】46120

【品名】(6S)-7-[[tert-butyl(dimethyl)silyl]oxy]-6-methyl-2-heptanol

【CA登记号】

【 分 子 式 】C14H32O2Si

【 分 子 量 】260.49238

【元素组成】C 64.55% H 12.38% O 12.28% Si 10.78%
与该中间体有关的原料药合成路线共 2 条
合成路线1合成路线2

合成路线1

该中间体在本合成路线中的序号：(XXV)

Assembly of the final product: The condensation of SAMP hydrazone (XVII) with 4-(benzyloxy)butyl iodide (XVIII) by means of LDA in THF gives the chiral 2-methylhexanal hydrazone (XIX), which is ozonolyzed in dichloromethane, yielding the free aldehyde (XX). The reduction of (XX) with NaBH4 in methanol affords the corresponding alcohol (XXI), which is protected with Tbdms-Cl and TEA in dichloromethane, providing the silyl ether (XXII). The hydrogenolysis of (XXII) with H2 over Pd/C in THF furnishes the alcohol (XXIII), which is oxidized to the aldehyde (XXIV) with oxalyl chloride, DMSO and TEA in dichloromethane. The methylation of aldehyde (XXIV) with Me-MgBr in THF gives the secondary alcohol (XXV), which is oxidized with tetrapropylammonium perruthenate (TPAP) in dichloromethane, yielding the methyl ketone (XXVI). The condensation of ketone (XXVI) with the intermediate phosphonium salt (XVI) by means of NaHMDS in THF gives the silylated diol (XXVII), which is selectively monodesilylated with CSA in dichloromethane/methanol to yield the primary alcohol (XXVIII). The oxidation of (XXVIII) with SO3/pyridine, DMSO and TEA in dichloromethane affords the corresponding aldehyde (XXIX), which is condensed with the oxoacid intermediate (VI) by means of LDA in THF to provide the linear heptadecadienoic acid (XXX) as a diastereomeric mixture that is separated at the carboxylic acid (XXXII) step.

参考文献 中间体
合成目标
【1】 Nicolaou, K.C.; et al.; Total syntheses of epothilones A and B via a macrolactonization-based strategy. J Am Chem Soc 1997, 119, 34, 7974.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VI) 43166 (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-4,4-dimethyl-5-oxoheptanoic acid C15H30O4Si 详情 详情
(XVI) 44459 [(3S,4E)-3-[[tert-butyl(dimethyl)silyl]oxy]-4-methyl-5-(2-methyl-1,3-thiazol-4-yl)-4-pentenyl](triphenyl)phosphonium iodide C34H43INOPSSi 详情 详情
(XVII) 44460 N-[(2R)-2-methoxypyrrolidinyl]-N-[(E)propylidene]amine; (2R)-2-methoxy-N-[(E)propylidene]-1-pyrrolidinamine C8H16N2O 详情 详情
(XVIII) 44461 benzyl 4-iodobutyl ether; 1-[(4-iodobutoxy)methyl]benzene C11H15IO 详情 详情
(XIX) 44462 N-[(E,2S)-6-(benzyloxy)-2-methylhexylidene]-N-[(2R)-2-methoxypyrrolidinyl]amine; (2R)-N-[(E,2S)-6-(benzyloxy)-2-methylhexylidene]-2-methoxy-1-pyrrolidinamine C19H30N2O2 详情 详情
(XX) 44463 (2S)-6-(benzyloxy)-2-methylhexanal C14H20O2 详情 详情
(XXI) 44464 (2S)-6-(benzyloxy)-2-methyl-1-hexanol C14H22O2 详情 详情
(XXII) 44465 benzyl (5S)-6-[[tert-butyl(dimethyl)silyl]oxy]-5-methylhexyl ether; [[(2S)-6-(benzyloxy)-2-methylhexyl]oxy](tert-butyl)dimethylsilane C20H36O2Si 详情 详情
(XXIII) 44466 (5S)-6-[[tert-butyl(dimethyl)silyl]oxy]-5-methyl-1-hexanol C13H30O2Si 详情 详情
(XXIV) 43163 (5S)-6-[[tert-butyl(dimethyl)silyl]oxy]-5-methylhexanal C13H28O2Si 详情 详情
(XXV) 46120 (6S)-7-[[tert-butyl(dimethyl)silyl]oxy]-6-methyl-2-heptanol C14H32O2Si 详情 详情
(XXVI) 46121 (6S)-7-[[tert-butyl(dimethyl)silyl]oxy]-6-methyl-2-heptanone C14H30O2Si 详情 详情
(XXVII) 40827 tert-butyl(dimethyl)silyl (1S,3Z,8S)-9-[[tert-butyl(dimethyl)silyl]oxy]-4,8-dimethyl-1-[(E)-1-methyl-2-(2-methyl-1,3-thiazol-4-yl)ethenyl]-3-nonenyl ether; 4-((1E,3S,5Z,10S)-3,11-bis[[tert-butyl(dimethyl)silyl]oxy]-2,6,10-trimethyl-1,5-undecadienyl)-2-methyl-1,3-thiazole C30H57NO2SSi2 详情 详情
(XXVIII) 40828 (2S,6Z,9S,10E)-9-[[tert-butyl(dimethyl)silyl]oxy]-2,6,10-trimethyl-11-(2-methyl-1,3-thiazol-4-yl)-6,10-undecadien-1-ol C24H43NO2SSi 详情 详情
(XXIX) 40829 (2S,6Z,9S,10E)-9-[[tert-butyl(dimethyl)silyl]oxy]-2,6,10-trimethyl-11-(2-methyl-1,3-thiazol-4-yl)-6,10-undecadienal C24H41NO2SSi 详情 详情
(XXX) 46118 (3S,6R,7S,8S,12Z,15S,16E)-3,15-bis[[tert-butyl(dimethyl)silyl]oxy]-7-hydroxy-4,4,6,8,12,16-hexamethyl-17-(2-methyl-1,3-thiazol-4-yl)-5-oxo-12,16-heptadecadienoic acid C39H71NO6SSi2 详情 详情

合成路线2

该中间体在本合成路线中的序号：(XXV)

Assembly of the final product: The condensation of SAMP hydrazone (XVII) with 4-(benzyloxy)butyl iodide (XVIII) by means of LDA in THF gives the chiral 2-methylhexanal hydrazone (XIX), which is ozonolyzed in dichloromethane, yielding the free aldehyde (XX). The reduction of (XX) with NaBH4 in methanol affords the corresponding alcohol (XXI), which is protected with Tbdms-Cl and TEA in dichloromethane, providing the silyl ether (XXII). The hydrogenolysis of (XXII) with H2 over Pd/C in THF furnishes the alcohol (XXIII), which is oxidized to the aldehyde (XXIV) with oxalyl chloride, DMSO and TEA in dichloromethane. The condensation of aldehyde (XXIV) with the intermediate phosphonium salt (XVI) by means of NaHMDS in THF gives the silylated diol (XXV), which is selectively monodesilylated with CSA in dichloromethane/methanol to yield the primary alcohol (XXVI). The oxidation of (XXVI) with SO3/pyridine, DMSO and TEA in dichloromethane affords the corresponding aldehyde (XXVII), which is condensed with the oxoacid intermediate (VI) by means of LDA in THF to provide the linear heptadecadienoic acid (XXVIII) as a diastereomeric mixture that is separated at the carboxylic acid (XXX) step. The fully silylation of (XVIII) with Tbdms-OTf and lutidine in dichloromethane gives the tetrasilyloxy compound (XXIX), which is stepwise desilylated first with K2CO3 in methanol to yield the carboxylic acid (XXX).

参考文献 中间体
合成目标
【1】 Nicolaou, K.C.; et al.; Total syntheses of epothilones A and B via a macrolactonization-based strategy. J Am Chem Soc 1997, 119, 34, 7974.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VI) 43166 (3S)-3-[[tert-butyl(dimethyl)silyl]oxy]-4,4-dimethyl-5-oxoheptanoic acid C15H30O4Si 详情 详情
(XVI) 44459 [(3S,4E)-3-[[tert-butyl(dimethyl)silyl]oxy]-4-methyl-5-(2-methyl-1,3-thiazol-4-yl)-4-pentenyl](triphenyl)phosphonium iodide C34H43INOPSSi 详情 详情
(XVII) 44460 N-[(2R)-2-methoxypyrrolidinyl]-N-[(E)propylidene]amine; (2R)-2-methoxy-N-[(E)propylidene]-1-pyrrolidinamine C8H16N2O 详情 详情
(XVIII) 44461 benzyl 4-iodobutyl ether; 1-[(4-iodobutoxy)methyl]benzene C11H15IO 详情 详情
(XIX) 44462 N-[(E,2S)-6-(benzyloxy)-2-methylhexylidene]-N-[(2R)-2-methoxypyrrolidinyl]amine; (2R)-N-[(E,2S)-6-(benzyloxy)-2-methylhexylidene]-2-methoxy-1-pyrrolidinamine C19H30N2O2 详情 详情
(XX) 44463 (2S)-6-(benzyloxy)-2-methylhexanal C14H20O2 详情 详情
(XXI) 44464 (2S)-6-(benzyloxy)-2-methyl-1-hexanol C14H22O2 详情 详情
(XXII) 44465 benzyl (5S)-6-[[tert-butyl(dimethyl)silyl]oxy]-5-methylhexyl ether; [[(2S)-6-(benzyloxy)-2-methylhexyl]oxy](tert-butyl)dimethylsilane C20H36O2Si 详情 详情
(XXIII) 44466 (5S)-6-[[tert-butyl(dimethyl)silyl]oxy]-5-methyl-1-hexanol C13H30O2Si 详情 详情
(XXIV) 43163 (5S)-6-[[tert-butyl(dimethyl)silyl]oxy]-5-methylhexanal C13H28O2Si 详情 详情
(XXV) 46120 (6S)-7-[[tert-butyl(dimethyl)silyl]oxy]-6-methyl-2-heptanol C14H32O2Si 详情 详情
(XXVI) 46121 (6S)-7-[[tert-butyl(dimethyl)silyl]oxy]-6-methyl-2-heptanone C14H30O2Si 详情 详情
(XXVII) 40827 tert-butyl(dimethyl)silyl (1S,3Z,8S)-9-[[tert-butyl(dimethyl)silyl]oxy]-4,8-dimethyl-1-[(E)-1-methyl-2-(2-methyl-1,3-thiazol-4-yl)ethenyl]-3-nonenyl ether; 4-((1E,3S,5Z,10S)-3,11-bis[[tert-butyl(dimethyl)silyl]oxy]-2,6,10-trimethyl-1,5-undecadienyl)-2-methyl-1,3-thiazole C30H57NO2SSi2 详情 详情
(XXVIII) 40828 (2S,6Z,9S,10E)-9-[[tert-butyl(dimethyl)silyl]oxy]-2,6,10-trimethyl-11-(2-methyl-1,3-thiazol-4-yl)-6,10-undecadien-1-ol C24H43NO2SSi 详情 详情
(XXIX) 40829 (2S,6Z,9S,10E)-9-[[tert-butyl(dimethyl)silyl]oxy]-2,6,10-trimethyl-11-(2-methyl-1,3-thiazol-4-yl)-6,10-undecadienal C24H41NO2SSi 详情 详情
(XXX) 46118 (3S,6R,7S,8S,12Z,15S,16E)-3,15-bis[[tert-butyl(dimethyl)silyl]oxy]-7-hydroxy-4,4,6,8,12,16-hexamethyl-17-(2-methyl-1,3-thiazol-4-yl)-5-oxo-12,16-heptadecadienoic acid C39H71NO6SSi2 详情 详情
Extended Information