Synthesis of 12-Membered Tetra-aza Macrocyclic Pyridinophanes Bearing Electron-Withdrawing Groups
作者:Akop Yepremyan、Magy A. Mekhail、Brian P. Niebuhr、Kristof Pota、Nishanth Sadagopan、Timothy M. Schwartz、Kayla N. Green
DOI:10.1021/acs.joc.0c00188
日期:2020.4.3
electron-withdrawing groups CN, Cl, NO2, and CF3 are introduced. Potentiometric titrations were used to determine the protonation constants of the new pyridinophanes. Further, the influence of such modifications on the chemical behavior is predicted by comparing the potentiometric results to previously reported systems. X-ray diffraction analysis of the 4-Cl substituted species and its Cu(II) complex are also
One-pot synthesis of polyaza[n]naphthalenophanes and polyaza[n]anthracenophanes
作者:M.Isabel Burguete、Beatriu Escuder、Santiago V. Luis、Juan F. Miravet、Manuel Querol、Enrique García-España
DOI:10.1016/s0040-4039(98)00587-5
日期:1998.5
Pernosylated polyaza[n]cyclophanes 13–20 were prepared by a Richman-Atkins modified methodology. Deprotection under mild conditions gave polyaza[n]cyclophanes 21–28. This methodology allows for the preparation of cyclophanes containing labile C-N bonds.
The present invention relates to a separation matrix comprised of a porous support to which ligands have been immobilised, wherein said ligands comprise at least one sulphonamide and the R group of the sulphonyl comprises an aromatic group. The nitrogen of the sulphonamide may be a secondary or tertiary amine. The invention also relates to a chromatography column that contains the described separation matrix, as well as to a method of isolating immunoglobulin-like compounds by adsorption to the separation matrix.
US8114280B2
申请人:——
公开号:US8114280B2
公开(公告)日:2012-02-14
Polyaza[n](1,4)naphthalenophanes and polyaza[n](9,10)anthracenophanes
作者:M.Isabel Burguete、Beatriu Escuder、Enrique Garcı́a-España、Santiago V Luis、Juan F Miravet
DOI:10.1016/s0040-4020(02)00180-1
日期:2002.4
A series of polyaza[n](1,4)naphthalenophanes and polyaza[n](9,10)anthracenophanes have been prepared by using the Fukuyama's protecting group (2- or 4-nitrophenyl sulfonyl) in a one-pot cyclization–deprotection reaction. Global yields for the purified products are comparable with those obtained for other polyazacyclophanes using the tosyl group as the amine protecting group. Their structural study
通过使用一锅环化-脱保护基的福山保护基团(2-或4-硝基苯基磺酰基)制备了一系列的聚氮杂[ n ](1,4)萘甲酸酯和聚氮杂[ n ](9,10)蒽酚。反应。纯化产物的总产率与使用甲苯磺酰基作为胺保护基的其他聚氮杂环烷类所获得的产率相当。他们的结构研究已通过NMR进行,显示出较小的循环具有较高的刚性,而该系列的最大成员具有较高的动态行为。化合物25旋转平衡的自由能垒比类似的N-甲苯磺酸化大环计算的自由能垒低约3kcal / mol 。