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【结 构 式】

【分子编号】67919

【品名】(S)-1-((tert-butyldimethylsilyl)oxy)pent-4-yn-2-ol

【CA登记号】 

【 分 子 式 】C11H22O2Si

【 分 子 量 】214.37998

【元素组成】C 61.63% H 10.34% O 14.93% Si 13.1%

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:(XX)

Chiral cyclopropanesulfonyl chloride intermediate (VIII) can be prepared as follows. Lithiation of (trimethylsilyl)acetylene (XVII) with t-BuLi in THF at –78 °C, and subsequent coupling with TBDMS-protected (S)-glycidol (XVIII) in the presence of BF3·Et2O at –78 °C affords the (S)-pentynol derivative (XIX). Then, the TMS-protecting group of intermediate (XIX) is selectively removed by means of K2CO3 in MeOH to give alkyne (XX). Iodoboration of alkyne (XX) with B-I-9-BBN in CH2Cl2 at 0 °C followed by deborination with AcOH yields 4-iodo-4-pentene-1,2(S)-diol (XXI). O-Protection of diol (XXI) with TBDMSOTf and pyridine in THF provides the bis-silyl ether (XXII), which is then submitted to Simmons-Smith cyclopropanation with CH2I2 in the presence of Et2Zn and TFA in DCE to produce 1,2-O-bis-TBDMS-3-(1-iodocyclopropyl)propane-1,2(S)-diol (XXIII). Desilylation of compound (XXIII) using HCl in THF gives 3-(1-iodocyclopropyl)propane-1,2(S)-diol (XXIV), which by trans-ketalization with 2,2-dimethoxypropane (XXV) by means of PPTS in CH2Cl2 gives 4(S)-(1-iodocyclopropylmethyl)-2,2-dimethyl-1,3-dioxolane (XXVI). Finally, alkyl iodide (XXVI) is treated with t-BuLi in Et2O at –78 °C, followed by chlorosulfonation with SO2Cl2 in Et2O (3).
Alternatively, deprotonation of dicyclopropyl disulfide (XXVII) with BuLi in THF, followed by alkylation with 4(R)-(bromomethyl)-2,2-dimethyl-1,3-dioxolane (XXVIII) at –78 °C affords the dimeric bis-acetonide (XXIX), which is reductively cleaved to the corresponding thiol monomer (XXX) by treatment with PPh3 and HCl in dioxane/H2O. Air oxidation of cyclopropanethiol derivative (XXX) in the presence of NaOH in DMF gives sodium cyclopropanesulfonate derivative (XXXI), which can also be obtained by direct oxidation of disulfide (XXIX) with H2O2 and NaOAc in AcOH at 80 °C. Finally, sulfonate (XXXI) is chlorinated using POCl3 at 80 °C. Alternatively, sulfonyl chloride (VIII) can be directly obtained from disulfide (XXIX) by oxidative cleavage with NCS in the presence of HCl in MeCN .

1 Maderna, A., Vernier, J., Barawkar, D., Chamakura, V., El Abdellaoui, H., Hong, Z. (Ardea Biosciences, Inc.). Derivatives of N-(arylamino)sulfonamides as inhibitors of MEK. US 2008058340, US 8101799.
2 Maderna, A., Vernier, J.-M., Barawkar, D., Chamakura, V., Abdellaoui, H.E., Hong, Z. (Ardea Biosciences, Inc.). N-(Arylamino)-sulfonamide inhibitors of MEK. EP 1912636, US 2012022076, WO 2007014011
3 Maderna, A., Vernier, J.-M. (Ardea Biosciences, Inc.). Preparation of (R)-and (S)-N-(3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-6-methoxyphenyl)-1-(2, 3-dihydroxypropyl)cyclopropane-1-sulfonamide and protected derivatives thereof. EP 2462111, JP 2013500242, KR 2012032536, WO 2011009541.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VIII) 67911 (S)-1-((5,5-dimethyltetrahydrofuran-2-yl)methyl)cyclopropane-1-sulfonyl chloride   C10H17ClO3S 详情 详情
(XVII) 23897 ethynyl(trimethyl)silane;trimethylsilyl acetylene 1066-54-2 C5H10Si 详情 详情
(XVIII) 42416 tert-butyl(dimethyl)[(2S)oxiranylmethoxy]silane; tert-butyl(dimethyl)silyl (2S)oxiranylmethyl ether 123237-62-7 C9H20O2Si 详情 详情
(XIX) 67918 (S)-1-((tert-butyldimethylsilyl)oxy)-5-(trimethylsilyl)pent-4-yn-2-ol   C14H30O2Si2 详情 详情
(XX) 67919 (S)-1-((tert-butyldimethylsilyl)oxy)pent-4-yn-2-ol   C11H22O2Si 详情 详情
(XXI) 67920 (S)-4-iodopent-4-ene-1,2-diol   C5H9IO2 详情 详情
(XXII) 67922 (S)-5-(2-iodoallyl)-2,2,3,3,8,8,9,9-octamethyl-4,7-dioxa-3,8-disiladecane   C17H37IO2Si2 详情 详情
(XXIII) 67921 1,2-O-bis-TBDMS-3-(1-iodocyclopropyl) propane-1,2(S)-diol;(S)-5-((1-iodocyclopropyl)methyl)-2,2,3,3,8,8,9,9-octamethyl-4,7-dioxa-3,8-disiladecane   C18H39IO2Si2 详情 详情
(XXIV) 67923 3-(1-iodocyclopropyl)propane-1,2(S)-diol   C6H11O2I 详情 详情
(XXV) 10722 1-Methoxy-1-methylethyl methyl ether; 2,2-Dimethoxypropane 77-76-9 C5H12O2 详情 详情
(XXVI) 67924 4(S)-(1-iodocyclopropylmethyl)-2,2-dimethyl- 1,3-dioxolane   C9H15IO2 详情 详情
(XXVII) 67925 dicyclopropyl disulfide;Dicyclopropyldisulfide 68846-57-1 C6H10S2 详情 详情
(XXVIII) 67926 4(R)-(bromomethyl)-2,2-dimethyl-1,3- dioxolane 14437-87-7 C6H11BrO2 详情 详情
(XXIX) 67927 1,2-bis(1-(((R)-2,2-dimethyl-1,3-dioxolan-4-yl)methyl)cyclopropyl)disulfane   C18H30O4S2 详情 详情
(XXX) 67929 (R)-1-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)cyclopropanethiol   C9H16O2S 详情 详情
(XXXI) 67928 sodium (R)-1-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)cyclopropane-1-sulfonate   C9H15NaO5S 详情 详情
Extended Information