A method of making a compound of Formula I:
is carried out by condensing a pair of compounds of Formula II (which pair may be the same or different), or by condensing a compound of Formula III with a compound Formula IV,
to produce a compound of Formula I. The condensing step may be carried out with a metal salt under basic conditions.
Synthesis and G-quadruplex binding studies of new 4-N-methylpyridinium porphyrins
作者:Diana P. N. Gonçalves、Sylvain Ladame、Shankar Balasubramanian、Jeremy K. M. Sanders
DOI:10.1039/b608494j
日期:——
A series of cationic porphyrins carrying 1–3 meso-N-pyridinium groups has been synthesised, and their binding to G-quadruplex DNA has been explored by surface plasmon resonance (SPR) and circular dichroism spectroscopy. Two trans substituents appear to be sufficient for tight binding; preferential binding to the anti-parallel intramolecular human telomeric DNA was observed for the A2trans and A3 porphyrins. The A2trans is able to induce the formation of an anti-parallel G-quadruplex in a K+ free solution, mimicking the effect of a molecular chaperone.
我们合成了一系列带有 1-3 个介-N-吡啶鎓基团的阳离子卟啉,并通过表面等离子体共振(SPR)和圆二色光谱法研究了它们与 G 型四链 DNA 的结合情况。两个反式取代基似乎足以实现紧密结合;观察到 A2trans 和 A3 两种卟啉优先与反平行的分子内人类端粒 DNA 结合。A2trans 能够在不含 K+ 的溶液中诱导形成反平行的 G-四联体,模拟分子伴侣的作用。
Carbohydrate Receptors Combining Both a Macrocyclic Building Block and Flexible Side Arms as Recognition Units: Design, Syntheses, and Binding Studies
作者:Jan Lippe、Monika Mazik
DOI:10.1021/jo502335u
日期:2015.2.6
Carbohydratereceptorscombining a macrocyclicbuildingblock and two flexiblesidearms were designed on the base of the analysis of the binding motifs found in the crystal structures of the complexes formed between artificial receptors and monosaccharides, reported previously by our group. Bindingstudies in two-phase systems, such as extractions of sugars from water into organic phase, as well as
在分析人工受体与单糖之间形成的复合物的晶体结构中发现的结合基序的基础上,设计了结合了大环结构单元和两个柔性侧臂的碳水化合物受体。在两相系统中进行结合研究,例如使用1从水中将糖提取到有机相以及在均质有机介质中1 H NMR和荧光光谱滴定证实了所设计化合物适合用作高效和选择性的碳水化合物受体。根据用作构建基的桥和侧臂的性质,可以开发具有不同结合特性的各种受体。获得的结果证实了受体设计的有效性,并揭示了晶体受体-糖复合物是设计新的有效受体系统的特别有价值的基础。
Total Synthesis and Stereochemical Revision of Acortatarins A and B
作者:Gangarajula Sudhakar、Vilas D. Kadam、Shruthi Bayya、Gavinolla Pranitha、Bharatam Jagadeesh
DOI:10.1021/ol202121k
日期:2011.10.21
A firsttotalsynthesis of acortatarins A, B, and an enantiomer of the proposed structure of acortatarin B is described by using readily available d-sugars. This convergent totalsynthesis revealed the revision of the absolute configuration of acortatarin A and structural revision of acortatarin B. The key steps involved are regioselective epoxide opening with deprotonated 2,5-disubstituted pyrrole
Methods of making porphyrins and related compounds with Lewis acids
申请人:——
公开号:US20030096978A1
公开(公告)日:2003-05-22
The present invention provides methods of making porphyrins and related compounds such as chlorins by condensing suitable starting materials (e.g., a dipyrromethane-dicarbinol plus dipyrromethane) in a polar solvent in the presence of a Lewis acid. The reactions are preferably carried out in a manner that minimizes rearrangement of the reaction product.