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【结 构 式】

【分子编号】42463

【品名】 

【CA登记号】

【 分 子 式 】C42H60O6Si

【 分 子 量 】689.0203

【元素组成】C 73.21% H 8.78% O 13.93% Si 4.08%

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:(XVI)

The condensation of intermediates (VII) and (XIII) by means of n-BuLi in THF, followed by hydrogenation, with H2 over Pd/C in ethyl acetate gives the protected ketone (XIV). The deprotection of the two Tes groups of (XIV) with CSA in chloroform/methanol gives rise to simultaneous intramolecular ketalization to give the two 6,6-spiroketals (XV) and (XVI) with opposite stereochemistry at the spiro center, which are separated by conventional methods. Spiroketal (XV), with correct stereochemistry, is treated with MeI and NaHCO3 in acetone/water to eliminate the mtm protecting group, and the resulting alcohol is esterified with monoallyl succinate (XVII) by means of DCC and DMAP in dichloromethane, yielding the ester (XVIII). The desilylation of (XVIII) with HF in pyridine/THF, followed by oxidation of the resulting alcohol with DMP, affords the aldehyde (XX), which is condensed with phosphonate (XXII) by means of LHMDS and HMPA in THF to give unsaturated allyl ester (XXIII). Elimination of the mpm protecting group of (XXIII) with DDQ in dichloromethane affords the primary alcohol (XXV). Spiroketal (XVI), with opposite stereochemistry, can be recovered by submitting it to the same sequence of reactions as (XV) to furnish intermediates (XIX), (XXI), (XXIV) and finally (XXVI), which is isomerized to (XXV) by treatment with CSA in chloroform/methanol.

1 Shimizu, T.; et al.; Total synthesis of reveromycin A. Org Lett 2000, 2, 14, 2153.
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) 42454   C35H59NO5Si2 详情 详情
(XIII) 42460 triethyl[((1R,2S)-1-[2-[(4-methoxybenzyl)oxy]ethyl]-2-methyl-3-butynyl)oxy]silane; 4-methoxybenzyl (3R,4S)-4-methyl-3-[(triethylsilyl)oxy]-5-hexynyl ether C21H34O3Si 详情 详情
(XIV) 42461   C54H90O7Si3 详情 详情
(XV) 42462   C42H60O6Si 详情 详情
(XVI) 42463   C42H60O6Si 详情 详情
(XVII) 42464 4-(allyloxy)-4-oxobutyric acid C7H10O4 详情 详情
(XVIII) 42465 1-allyl 4-((2S,3R,6S,8R,9S)-3-butyl-2-([[tert-butyl(diphenyl)silyl]oxy]methyl)-8-[2-[(4-methoxybenzyl)oxy]ethyl]-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl) succinate C48H66O9Si 详情 详情
(XIX) 42466 1-allyl 4-((2S,3R,6R,8R,9S)-3-butyl-2-([[tert-butyl(diphenyl)silyl]oxy]methyl)-8-[2-[(4-methoxybenzyl)oxy]ethyl]-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl) succinate C48H66O9Si 详情 详情
(XX) 42467 1-allyl 4-((2R,3R,6S,8R,9S)-3-butyl-2-formyl-8-[2-[(4-methoxybenzyl)oxy]ethyl]-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl) succinate C32H46O9 详情 详情
(XXI) 42468 1-allyl 4-((2R,3R,6R,8R,9S)-3-butyl-2-formyl-8-[2-[(4-methoxybenzyl)oxy]ethyl]-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl) succinate C32H46O9 详情 详情
(XXII) 42469 allyl (E)-4-(diethoxyphosphoryl)-3-methyl-2-butenoate C12H21O5P 详情 详情
(XXIII) 42470 1-allyl 4-((2S,3R,6S,8R,9S)-2-[(1E,3E)-5-(allyloxy)-3-methyl-5-oxo-1,3-pentadienyl]-3-butyl-8-[2-[(4-methoxybenzyl)oxy]ethyl]-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl) succinate C40H56O10 详情 详情
(XXIV) 42471 1-allyl 4-((2S,3R,6R,8R,9S)-2-[(1E,3E)-5-(allyloxy)-3-methyl-5-oxo-1,3-pentadienyl]-3-butyl-8-[2-[(4-methoxybenzyl)oxy]ethyl]-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl) succinate C40H56O10 详情 详情
(XXV) 42472 1-allyl 4-[(2S,3R,6S,8R,9S)-2-[(1E,3E)-5-(allyloxy)-3-methyl-5-oxo-1,3-pentadienyl]-3-butyl-8-(2-hydroxyethyl)-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl] succinate C32H48O9 详情 详情
(XXVI) 42473 1-allyl 4-[(2S,3R,6R,8R,9S)-2-[(1E,3E)-5-(allyloxy)-3-methyl-5-oxo-1,3-pentadienyl]-3-butyl-8-(2-hydroxyethyl)-9-methyl-1,7-dioxaspiro[5.5]undec-3-yl] succinate C32H48O9 详情 详情
Extended Information