A mild and efficient method for the selective cleavage of tert-butyldimethylsilyl ethers to alcohols
摘要:
A mild and efficient method for the selective deprotection of primary allylic and homoallylic, primary benzylic and aryl tert-butyldimethylsilyl (TBDMS) ethers has been established using a combination of H2O and DMSO at 90 degrees C. All other primary and secondary TBDMS ethers remained unaffected under the reaction condition. The method is very effective in deprotection of TBDMS ethers in the presence of other sensitive functional groups. Copyright (C) 1996 Published by Elsevier Science Ltd
Chiral Diselenides in the Total Synthesis of (+)-Samin
作者:Thomas Wirth、Klaus J. Kulicke、Gianfranco Fragale
DOI:10.1021/jo952093m
日期:1996.1.1
to catalytic reactions in the synthesis of substituted tetrahydrofuran derivatives: The selenium compound 1 was used in catalytic amounts for a rapid access to chiral diselenide 3. The efficient stereoselective addition to alkene 5 yields product 8 with a selenium functionality as a precursor for an intramolecular radical cyclization. In this way a short total synthesis of (+)-samin (11), a naturally
Radical Cation Diels–Alder Cycloadditions by Visible Light Photocatalysis
作者:Shishi Lin、Michael A. Ischay、Charles G. Fry、Tehshik P. Yoon
DOI:10.1021/ja2093579
日期:2011.12.7
Ruthenium(II) polypyridyl complexes promote the efficient radicalcation Diels-Alder cycloaddition of electron-rich dienophiles upon irradiation with visible light. These reactions enable facile [4 + 2] cycloadditions that would be electronically mismatched under thermal conditions. Key to the success of this methodology is the availability of ligand-modified ruthenium complexes that enable rational
钌 (II) 多吡啶基配合物在可见光照射下促进富电子亲二烯体的有效自由基阳离子 Diels-Alder 环加成反应。这些反应使 [4 + 2] 环加成能够在热条件下发生电子失配。这种方法成功的关键是配体修饰的钌配合物的可用性,这些配合物能够合理调整催化剂的电化学性能,而不会显着扰乱系统的整体光物理性能。
A mild and efficient method for the selective cleavage of tert-butyldimethylsilyl ethers to alcohols
作者:Gourhari Maiti、Subhas Chandra Roy
DOI:10.1016/s0040-4039(96)02353-2
日期:1997.1
A mild and efficient method for the selective deprotection of primary allylic and homoallylic, primary benzylic and aryl tert-butyldimethylsilyl (TBDMS) ethers has been established using a combination of H2O and DMSO at 90 degrees C. All other primary and secondary TBDMS ethers remained unaffected under the reaction condition. The method is very effective in deprotection of TBDMS ethers in the presence of other sensitive functional groups. Copyright (C) 1996 Published by Elsevier Science Ltd