- GREEN, COPPER-CATALYZED DISPROPORTIONATION OF AROMATIC AND HETEROAROMATIC CARBOXYLATES TO DICARBOXYLATES
-
The present application relates to a process for preparation of a compound of Formula (I) and Formula (IV): wherein is as described herein; and wherein and R are as described herein.
- -
-
Paragraph 0123-0125
(2020/06/08)
-
- Ultralong Phosphorescence from Organic Ionic Crystals under Ambient Conditions
-
A new type of materials, organic salts in the crystal state, have ultralong organic phosphorescence (UOP) under ambient conditions. The change of cations (NH4+, Na+, or K+) in these phosphors gives access to tun
- Cheng, Zhichao,Shi, Huifang,Ma, Huili,Bian, Lifang,Wu, Qi,Gu, Long,Cai, Suzhi,Wang, Xuan,Xiong, Wei-Wei,An, Zhongfu,Huang, Wei
-
supporting information
p. 678 - 682
(2017/12/26)
-
- Surface modified EuxLa1-xF3 nanoparticles as luminescent biomarkers: Still plenty of room at the bottom
-
Investigation of the formation and luminescent properties of surface modified bimetallic lanthanide fluorides and their use in bioimaging is described. We have shown that the solvent during the wet synthesis of EuF3 nanoparticles affects the na
- Khudoleeva, Vladislava Yu.,Utochnikova, Valentina V.,Kalyakina, Alena S.,Deygen, Irina M.,Shiryaev, Andrey A.,Marciniak, ?ukasz,Lebedev, Vasiliy A.,Roslyakov, Ilya V.,Garshev, Alexey V.,Lepnev, Leonid S.,Schepers, Ute,Br?se, Stefan,Kuzmina, Natalia P.
-
p. 348 - 355
(2017/05/08)
-
- Metal-dependent ribbon and self-penetrated topologies in nitroaromatic-sensing zinc and cadmium coordination polymers with terephthalate and dipyridylamide ligands
-
Hydrothermal reaction of the requisite metal nitrate, potassium terephthalate (K2tere) and the dipyridylamide 3-pyridylisonicotinamide (3-pina) afforded a pair of crystalline coordination polymers whose dimensionality and topology depends criti
- Wudkewych, Megan J.,LaDuca, Robert L.
-
-
- An improved and practical synthesis of tranexamic acid
-
Tranexamic acid 1, a synthetic antifibrinolytic drug with the treatment being considered highly cost-effective in many countries, has been included in the WHO list of essential medicines. In this paper, we designed the synthesis of 1 via a novel seven-step route from the readily available starting material dimethyl terephthalate, performing with 99.6% purity in 59.2% overall yield. During the process, we successfully developed a direct and efficient method for the preparation of key intermediate methyl 4-(acetamidomethyl)benzoate by one-pot hydrogenation and acylation in acetic anhydride using Ni/Al2O3 as a catalyst. More importantly, it should be a straightforward and practical way to circumvent the usage of toxic reagents (CrO3, Cl2), solvent (CCl4), and expensive catalyst (PtO2), etc., that plagued the previous methodologies.
- Li, Zhenhua,Fang, Li,Wang, Jian,Dong, Liuhong,Guo, Yanna,Xie, Yuanyuan
-
p. 444 - 448
(2015/03/30)
-
- Metal-organic fireworks: MOFs as integrated structural scaffolds for pyrotechnic materials
-
A new approach to formulating pyrotechnic materials is presented whereby constituent ingredients are bound together in a solid-state lattice. This reduces the batch inconsistencies arising from the traditional approach of combining powders by ensuring the key ingredients are 'mixed' in appropriate quantities and are in intimate contact. Further benefits of these types of material are increased safety levels as well as simpler logistics, storage and manufacture. A systematic series of new frameworks comprising fuel and oxidiser agents (group 1 and 2 metal nodes & terephthalic acid derivatives as linkers) has been synthesised and structurally characterised. These new materials have been assessed for pyrotechnic effect by calorimetry and burn tests. Results indicate that these materials exhibit the desired pyrotechnic material properties and the effect can be correlated to the dimensionality of the structure. A new approach to formulating pyrotechnic materials is proposed whereby constituent ingredients are bound together in a solid-state lattice. A series of Metal-organic framework frameworks comprising fuel and oxidiser agents exhibits the desired properties of a pyrotechnic material and this effect is correlated to the dimensionality of the structure.
- Blair,Colakel,Vrcelj,Sinclair,Coles
-
supporting information
p. 12185 - 12188
(2015/07/27)
-
- Noncovalent catch and release of carboxylates in water
-
Association constants of a bis-(acetylguanidinium)ferrocene dication to various (di)carboxylates were determined through UV-vis titrations. Association constant values greater than 104 M-1 were determined for both phthalate and maleate carboxylates to the bis-(acetylguanidinium)ferrocene salt in pure water. Density functional theory computations of the binding enthalpy of the rigid carboxylates for these complexes agree well with the experimentally determined association constants. Catch and release competitive binding experiments were done by NMR for the cation-carboxylate ion-pair complexes with cucurbit[7]uril, and they show dissociation of the ion-pair complex upon addition of cucurbit[7]uril and release of the free (di)carboxylate.
- Beck, Christie L.,Winter, Arthur H.
-
p. 3152 - 3158
(2014/05/06)
-
- Synthesis and photophysical studies of self-assembled multicomponent supramolecular coordination prisms bearing porphyrin faces
-
Multicomponent self-assembly, wherein two unique donor precursors are combined with a single metal acceptor instead of the more common two-component assembly, can be achieved by selecting Lewis-basic sites and metal nodes that select for heteroligated coordination spheres. Platinum(II) ions show a thermodynamic preference for mixed pyridyl/carboxylate coordination environments and are thus suitable for such designs. The use of three or more unique building blocks increases the structural complexity of supramolecules. Herein, we describe the synthesis and characterization of rectangular prismatic supramolecular coordination complexes (SCCs) with two faces occupied by porphyrin molecules, motivated by the search for new multichromophore complexes with promising light-harvesting properties. These prisms are obtained from the self-assembly of a 90° Pt(II) acceptor with a meso-substituted tetrapyridylporphyrin (TPyP) and dicarboxylate ligands. The generality of this self-assembly reaction is demonstrated using five dicarboxylate ligands, two based on a rigid central phenyl ring and three alkyl-spaced variants, to form a total of five free-base and five Zn-metallated porphyrin prisms. All 10 SCCs are characterized by 31P and 1H multinuclear NMR spectroscopy and electrospray ionization mass spectrometry, confirming the structure of each self-assembly and the stoichiometry of formation. The photophysical properties of the resulting SCCs were investigated revealing that the absorption and emission properties of the free-base and metallated porphyrin prisms preserve the spectral features associated with free TPyP.
- Shi, Yanhui,Sánchez-Molina, Irene,Cao, Changsheng,Cook, Timothy R.,Stang, Peter J.
-
p. 9390 - 9395
(2014/07/21)
-
- Parallel chain polyrotaxane, layer, and diamondoid divalent metal coordination polymers containing para aromatic dicarboxylate and bis(4-pyridylmethyl)piperazine ligands
-
Hydrothermal reaction of a closed-shell divalent metal salt, a para aromatic dicarboxylate precursor, and the long-spanning dipyridyl ligand bis(4-pyridylmethyl)piperazine (4-bpmp) afforded three new coordination polymers, which were structurally characte
- Farnum, Gregory A.,Murray, Nathan H.,LaDuca, Robert L.
-
-
- Hydrogenation reactions
-
Catalytic reactions for the hydrogenation of alkenyl, alkynyl, aryl, cyano, imino, carbonyl and carboxyl groups and for the synthesis of ammonia are disclosed.
- -
-
-
- Dehydrogenation reactions
-
A method is disclosed for dehydrogenating a parafinic or naphthenic compound and for dehydrocyclizing a paraffinic compound comprising a straight chain of at least 5 carbon atoms, comprising: contacting an aforesaid compound under dehydrogenation conditio
- -
-
-