Chemistry of Phosphorus Ylides. Part 34 Synthesis of Chromenone Phosphanylidene and Cyclobutylidene Derivatives
作者:Soher S. Maigali、Mohamed H. Arief、Marwa EL-Hussieny、Fouad M. Soliman
DOI:10.1080/10426507.2011.600741
日期:2012.2.1
Abstract The reaction of nucleophilic phosphacumulene ylides with visnaginone and khellinone afforded the corresponding phosphanylidene and furochromene derivatives. Moreover, pyranochromenes were obtained from the reaction of chromene carbaldehydes with phosphacumulenes. On the other hand, the phosphanylidene-cyclobutylidenes and their dimers were produced from the reaction of furochromene carbaldehydes
Atta, Sanaa M. S.; Hafez, Taghrid S.; Mahran, Mohamed R., Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 80, # 1-4, p. 109 - 116
作者:Atta, Sanaa M. S.、Hafez, Taghrid S.、Mahran, Mohamed R.
DOI:——
日期:——
Modular Synthesis of Methyl-Substituted Novel Psoralen N-Hydroxysuccinimide Esters and Evaluation of DNA Photocrosslinking Properties of the Corresponding Triplex-Forming Oligonucleotide Conjugates
have been used to induceDNA mutations or to suppress gene expression through the formation of crosslinked products with DNA in a sequence-specific manner. Psoralen can crosslink with DNA at its furan-ring and/or pyrone-ring side, yielding either a monoadduct or diadduct (interstrand crosslinking) product. The differences in the crosslinked structures of Ps-TFOs with the target DNAs are closely related
补骨脂素缀合的三链体形成寡核苷酸 (Ps-TFO) 已被用于通过以序列特异性方式与 DNA 形成交联产物来诱导 DNA 突变或抑制基因表达。补骨脂素可以在其呋喃环和/或吡喃酮环侧与 DNA 交联,产生单加合物或双加合物(链间交联)产物。 Ps-TFO与靶DNA交联结构的差异与Ps-TFO引起的生物学结果的变化密切相关。然而,只有少数报告讨论了 Ps-TFO 的光交联特性。具有结构多样的补骨脂素衍生物的 Ps-TFO 的光交联特性仍然难以捉摸。在此,我们报告了新型甲基取代补骨脂素 N-羟基琥珀酰亚胺 (NHS) 酯的模块化合成。通过使用这些酯,研究了补骨脂素的甲基取代基对相应 Ps-TFO 光交联的影响。当C-3和C-4位甲基取代基存在时,双加合物产物的量显着减少,同时光交联产物的总量保持不变。这项工作证明了通过将甲基引入补骨脂素来控制 Ps-TFO 交联产物的可能性:这种操纵产物的能力是 Ps-TFO