نتایج جستجو برای: macrocycle

تعداد نتایج: 1399  

Journal: :Organic & biomolecular chemistry 2011
Aya Harano Minako Tanaka Takeshi Nakagaki Masahiko Annaka Keiko Ideta Kenta Goto Teruo Shinmyozu

The novel tetrahedral macrocycles 1a-1c have been synthesized. Macrocycles 1a and 1c were revealed to have the property to increase in volume in solution by complexation between the macrocycle and the solvent molecules.

2014
Jun Tang Stacey A. Jones Jerry L. Jeffery Sonia R. Miranda Cristin M. Galardi David M. Irlbeck Kevin W. Brown Charlene B. McDanal Nianhe Han Daxin Gao Yongyong Wu Bin Shen Chunyu Liu Caiming Xi Heping Yang Rui Li Yajun Yu Yufei Sun Zhimin Jin Erjuan Wang Brian A. Johns

A macrocycle provides diverse functionality and stereochemical complexity in a conformationally preorganized ring structure, and it occupies a unique chemical space in drug discovery. However, the synthetic challenge to access this structural class is high and hinders the exploration of macrocycles. In this study, efficient synthetic routes to macrocyclized betulin derivatives have been establi...

Journal: :Molecules 2017
Ana F R Cerqueira Vítor A S Almodôvar Maria G P M S Neves Augusto C Tomé

This review covers the synthesis of coumarin-porphyrin, coumarin-phthalocyanine and coumarin-corrole conjugates and their potential applications. While coumarin-phthalocyanine conjugates were obtained almost exclusively by tetramerization of coumarin-functionalized phthalonitriles, coumarin-porphyrin and coumarin-corrole conjugates were prepared by complementary approaches: (a) direct synthesis...

Journal: :Journal of the American Chemical Society 2021

2015
Matthew J. Langton Yaoyao Xiong Paul D. Beer

The synthesis of an all-halogen-bonding rotaxane for anion recognition is achieved by using active-metal templation. A flexible bis-iodotriazole-containing macrocycle is exploited for the metal-directed rotaxane synthesis. Endotopic binding of a Cu(I) template facilitates an active-metal CuAAC iodotriazole axle formation reaction that captures the interlocked rotaxane product. Following copper-...

2014
Mathias O. Senge Hans-Georg Eckhardt

In the title compound, C44H37BN4O2, the dihedral angle between the plane of the porphyrin macrocycle ring system [r.m.s. deviation = 0.159 (1) Å] and those of three phenyl rings are 66.11 (4), 74.75 (4) and 57.00 (4)°. The conformational distortion is characterized by a mixture of ruffled, saddle and in-plane distortion modes. In the crystal, the porphyrin mol-ecules are linked by C-H⋯π inter-a...

2008
Han-Ping Zhang Jin-Xia Zhu Hong Zhou Zhi-Quan Pan

The title complex, [Cu(2)(C(22)H(20)Br(2)N(4)O(2))(ClO(4))(2)], was prepared by the condensation of 2,6-diformyl-4-bromo-phenol with 1,3-diamino-propane in the presence of copper(II) ions. The macrocyclic ligand shows an approximately planar structure except for the two propene groups in the macrocycle. The coordination polyhedron of each Cu atom can be described as distorted square pyramidal. ...

2011
Li-Ke Zou Yan Lu Jie Cheng Xi-Yang He Bin Xie

In the crystal structure of the title compound, [Ni(C(16)H(36)N(4))](C(6)H(4)O(2)PS(2))(2), the Ni(II) cation is located on a center of inversion and is chelated by the folded tetra-amine macrocycle ligand in a slightly distorted NiN(4) square-planar geometry. Two symmetry-related O,O'-(1,2-phenyl-ene)dithio-phosphate anions are located on either side of the Ni(II) cation, with Ni⋯S of 3.9558 (...

Journal: :Helvetica Chimica Acta 2023

The development of porous materials is great interest for the capture CO2 from various emission sources, which essential to mitigate its detrimental environmental impact. In this direction, organic polymers (POPs) have emerged as prime candidates owing their structural tunability, physiochemical stability and high surface areas. an effort transfer intrinsic property a cyclotetrabenzoin-derived ...

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