- Catalytic Double Carbon–Boron Bond Formation for the Synthesis of Cyclic Diarylborinic Acids as Versatile Building Blocks for π-Extended Heteroarenes
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The first catalytic synthesis of cyclic diarylborinic acids is developed using a dihydroaminoborane reagent as the boron source. Unlike previously reported methods that use organolithium reagents, this method allows the easy synthesis of cyclic diarylbori
- Igarashi, Takuya,Tobisu, Mamoru,Chatani, Naoto
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- Structural Elucidation of Selective Solvatochromism in a Responsive-at-Metal Cyclometalated Platinum(II) Complex
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We report the synthesis, characterization, and spectroscopic investigations of a new responsive-at-metal cyclometalated platinum(II) complex. With mild chemical oxidants and reductants, it was possible to obtain the same complex in three different oxidati
- Andrews, Ryan J.,Carta, Veronica,Chaudhry, Mohammad T.,MacLachlan, Mark. J.,Soto, Miguel A.
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- Multiresponsive Cyclometalated Crown Ether Bearing a Platinum(II) Metal Center
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Multiresponsive materials can adapt to numerous changes in their local environment, which makes them highly valuable for various applications. Although nanostructured and polymeric multiresponsive materials are plentiful, small-molecule analogues are scarce. This work presents a compact cyclometalated platinum(II) complex that bears a crown ether cavity (18C6-PtII); the intimate ring/emitter connectivity is key to unlocking multiresponsiveness. Complex 18C6-PtII responds to (i) cationic guests, producing changes in luminescence in both solution and the solid state, (ii) solvent molecules, which perturb the packing of the complex in the solid state and cause reversible color changes, and (iii) solvent polarity, which leads to controlled aggregation. These responses may enable 18C6-PtII to function as a sensor for ions and solvents, or as a functional unit for the fabrication of hybrid supramolecular polymers and metallogels.
- Andrews, Ryan J.,Cano, Maria T.,Carta, Veronica,MacLachlan, Mark J.,Patrick, Brian O.,Soto, Miguel A.
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supporting information
p. 2999 - 3006
(2021/12/06)
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- Direct oxidation of the C(sp2)-C(sp3) bond from benzyltrimethylsilanes to phenols
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A novel pathway for direct conversion of benzylsilanes to phenols by oxidation with Na2S2O8 and oxygen is efficiently developed under mild and neutral conditions. The reaction shows good functional group tolerance to afford phenols in moderate yields. The possible mechanism is proposed based on the isotopic labeling trials.
- Li, Wei,Gao, Guolin,Gao, Yuan,Yang, Chao,Xia, Wujiong
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p. 5291 - 5293
(2017/07/10)
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- Synthesis technology of o-hydroxy phenyl ethyl ether
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The invention discloses a synthesis technology of o-hydroxy phenyl ethyl ether. The synthesis technology takes catechol as a raw material, diethyl carbonate as an alkylating reagent, and titanium-zirconium load type phosphoric acid as a catalyst; a prepar
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Paragraph 0020-0027
(2017/06/14)
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- Synthesis, Ion Recognition Ability, and Metal-Assisted Aggregation Behavior of Dinuclear Metallohosts Having a Bis(Saloph) Macrocyclic Ligand
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Macrocyclic molecule 1 that has two saloph coordination sites was designed and synthesized. The macrocycle 1 was easily converted into the corresponding metallohosts 2 and 3 by the reaction with nickel(II) and palladium(II), respectively. As expected from
- Akine, Shigehisa,Utsuno, Fumihiko,Piao, Shunjin,Orita, Hideo,Tsuzuki, Seiji,Nabeshima, Tatsuya
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p. 810 - 821
(2016/02/03)
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- Copper(II)-catalyzed hydroxylation of aryl halides using glycolic acid as a ligand
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Copper(II)-catalyzed hydroxylation of aryl halides has been developed to afford functionalized phenols. The protocol utilizes the reagent combination of Cu(OH)2, glycolic acid, and NaOH in aqueous DMSO, all of which are cheap, readily available, and easily removable after the reaction. A broad range of aryl iodides and activated aryl bromides were transformed into the corresponding phenols in excellent yields. Moreover, it has been shown that C-O(alkyl)-coupled product, instead of phenol, can be predominantly formed under similar reaction conditions.
- Xiao, Yan,Xu, Yongnan,Cheon, Hwan-Sung,Chae, Junghyun
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p. 5804 - 5809
(2013/07/25)
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- Highly efficient regulation of cation recognition and promotion of self-assembly by metalation of a macrocyclic bis(N2O2) ligand with nickel(ii)
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Metalation of a bis(N2O2) macrocyclic ligand 1 with nickel(ii) acetate afforded a dinuclear metallohost 2, resulting in a significant enhancement of recognition ability of alkali metal ions and the promotion of self-aggregation.
- Akine, Shigehisa,Utsuno, Fumihiko,Nabeshima, Tatsuya
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supporting information; experimental part
p. 1029 - 1031
(2010/06/17)
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- Process for the stereoselective preparation of a hetero-bicyclic alcohol enantiomer
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The invention relates to a method for the stereoselective preparation of a hetero-bicyclic alcohol enantiomer, characterized in that a substantially pure enantiomer of the general formula STR1 is prepared from a compound of the general formula STR2 wherein the variable are as defined as in claim 1. The method comprises the following successive reaction steps: (i) reaction with a substantially enantiomerically pure compound of the general formula STR3 wherein Z, R3 and R4 are defined as in claim 1; (ii) subjection of the compound formed to a deprotection/ring-closure reaction; (iii) optionally deprotection of the hydroxy group of the ring-closed product. The invention further relates to enantiomerically pure intermediates, the preparation of these intermediates and the preparation of a starting compound.
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- Macroring-Neutral Molecule Complexation. Synthesis of Biconcave Pyridino Hosts, Complex Formation, and X-ray Crystal Structures of Two Inclusion Compounds
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A series of pyridino macrocycles 1-3(a-e) incorporating rigid bi- and triaryl ether segments in different ring positions have been synthesized.The effect of incorporation of these building blocks into a given macroring framework on the host properties for
- Weber, Edwin,Koehler, Hans-Juergen,Reuter, Hans
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p. 1236 - 1242
(2007/10/02)
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- Thrombin inhibitory new dihydroxybenzene ether derivatives
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An ether derivative of a dihydroxybenzene of the formula STR1 in which R 1 is 1 to 3 identical or different substituents selected from hydrogen, halogen, trifluoromethyl, carboxyl, alkyl, alkoxy, alkylmercapto and carbalkoxy, with in each case 1 to 4 carb
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- Multiple Benzo-fused Crown Ethers - Synthesis, Ion Selectivities in Membrane Electrodes and Inclusion of Water
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New oligo-benzo-condensed crown-6 ligands 4, 6 - 9 having a different gradation of lipophilicity and of molecular rigidity are synthesized.For the known ligands 3 and 5 of similar constitution improved methods of preparation are described.The carrier efficiencies and ion selectivities of the various ligands for alkali and alkaline earth metal ions in liquid membrane electrodes of different composition are determined and discussed on the basis of the potentiometric selectivity factors lgKPotMgM.The possible behaviour of the new macrocycles in molecular inclusion is studied.A stable crystal lattice inclusion compound of 4 with water of composition 4*1/2 H2O is obtained.
- Weber, Edwin
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p. 4439 - 4452
(2007/10/02)
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