932-31-0Relevant articles and documents
Morphology control of selenophene-thiophene block copolymers through side chain engineering
Hollinger, Jon,Seferos, Dwight S.
, p. 5002 - 5009 (2014)
We report the synthesis of three fully π-conjugated diblock copolymers containing selenophene- and thiophene-based repeating units. All of these diblock copolymers undergo phase separation, and by systematically changing the compatibility of the two blocks through side chain modification, we are able to access different thin film morphologies. Introducing a bulky 2-ethylhexyl side chain increases solubility while retaining crystallinity of the selenophene block. While poly(3-hexylselenophene)-b-poly(3-hexylthiophene) and poly(3-(2-ethylhexyl)selenophene-b-poly(3-(2-ethylhexyl)thiophene) form more disordered fibrillar structures, poly(3-hexylthiophene)-b-poly(3-(2-ethylhexyl) selenophene) forms long (1-2 μm) solid state fibrillar structures that are reminiscent of the lamellae that are formed by nonconjugated block copolymers. We further use electron energy loss spectroscopy to visualize thiophene- and selenophene-rich domains at the nanometer scale in each of these examples. By studying new polymer compositions and relating them to solid state structure, we further our understanding of heterocycle induced phase separation and phase separation in general.
Cleaving Dihydrogen with Tetra(o-tolyl)diborane(4)
Tsukahara, Nana,Asakawa, Hiroki,Lee, Ka-Ho,Lin, Zhenyang,Yamashita, Makoto
, p. 2593 - 2596 (2017)
Tetra(o-tolyl)diborane(4), 1, was synthesized and characterized experimentally as well as theoretically by density functional theory (DFT) calculations. Exposure of 1 to H2 (1 bar) at room temperature afforded the corresponding di(o-tolyl)hydroborane through cleavage of the H-H and B-B bonds. DFT calculations suggested a diarylboryl anion character for the transition state.
Benzylamino side arm-containing half-sandwich fourth subgroup metal complex and application thereof
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Paragraph 0044-0046, (2021/07/31)
The invention discloses a benzylamino side arm-containing half-sandwich fourth subgroup metal complex as well as a preparation method and application thereof, and the benzylamino side arm-containing half-sandwich fourth subgroup metal complex is activated by a proper cocatalyst and is used for catalyzing ethylene homopolymerization or copolymerization of ethylene and alpha-olefin. By adjusting substituent groups on the ligand and reaction conditions, a copolymer with relatively high molecular weight can be generated during high-activity catalysis of copolymerization of ethylene and alpha-olefin such as propylene, 1-butene, 1-hexene, 1-octene and 1-decene and cycloolefin such as norbornene, ethylidene norbornene and dicyclopentadiene.
TETRAMERISATION OF ETHYLENE
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Page/Page column 32, (2014/12/09)
A process for the tetramerisation of ethylene includes contacting ethylene with a catalyst under ethylene oligomerisation conditions. The catalyst comprises a source of chromium, a ligating compound, and an activator. The ligating compound includes a phosphine that forms part of a cyclic structure.
Cyclopalladation of telluro ether ligands: Synthesis, reactivity and structural characterization
Kolay, Siddhartha,Kumar, Mukesh,Wadawale, Amey,Das, Dasarathi,Jain, Vimal K.
supporting information, p. 16056 - 16065 (2015/01/09)
Treatment of [PdCl2(PhCN)2] with diaryl telluride in 1:2 molar ratio gave mononuclear palladium complexes, trans-[PdCl2(TeR2)2] (1) (R = Mes (1a) (Mes = 2,4,6-trimethylphenyl), Ph (1b), o-tol (1c) (o-tol = ortho-tolyl)). Reaction of [PdCl2(TeMes2)2] with one equivalent of [PdCl2(PhCN)2] or Na2PdCl4 with TeRR′ afforded chloro-bridged binuclear complexes, [Pd2(μ-Cl)2Cl2(TeRR′)2] (2) (R/R′ = Mes/Mes (2a); Mes/Ph (2b); Ph/Ph (2c)). A toluene-methanol solution of trans-[PdCl2(TeMes2)2] on refluxing for 30 minutes yielded a binuclear cyclopalladated complex, [Pd2(μ-Cl)2{CH2C6H2(4,6-Me2)TeMes)}2] (3). When the refluxing was prolonged, a mononuclear complex cis-[PdCl2{MesTeCH2C6H2(4,6-Me2)TeMes}] (4) was isolated. Treatment of palladium acetate with TeMes2 afforded an acetato-bridged analogue of 3, [Pd2(μ-OAc)2{CH2C6H2(4,6-Me2)TeMes}2] (5a) together with a very minor component, a tetranuclear complex, [Pd(μ-OAc)(μ-TeMes)]4 (6). This reaction with unsymmetrical tellurides, MesTeR, also gave cyclopalladated complexes [Pd2(μ-OAc)2{CH2C6H2(4,6-Me2)TeR}2] (R = o-tol (5b) and Ph (5c)) in which 2-methyl of the mesityl group of the telluride was exclusively metallated. The complex trans-[PdCl2(TeMes2)2] on refluxing in xylene gave palladium telluride, Pd7Te3. These complexes were characterized by elemental analyses, IR and NMR (1H, 13C and 125Te) spectroscopy. The molecular structures of trans-[PdCl2(TeMes2)2] (1a), [Pd2(μ-Cl)2Cl2(TeMes2)2]·2acetone (2a·2acetone), cis-[PdCl2{MesTeCH2C6H2(4,6-Me2)TeMes}] (4), [Pd2(μ-OAc)2{CH2C6H2(4,6-Me2)TeMes)}2]·toluene (5a·toluene), [Pd2(μ-OAc)2{CH2C6H2(4,6-Me2)Tetol-o}2] (5b) and [Pd(μ-OAc)(μ-TeMes)]4 (6) were established by single crystal X-ray diffraction analyses. The mononuclear complex 1a was isolated in two polymorphic forms each with the trans configuration. This journal is
Ambient arylmagnesiation of alkynes catalysed by ligandless nickel(ii)
Xue, Fei,Zhao, Jin,Hor, T. S. Andy
, p. 10121 - 10123 (2013/10/22)
A simple and efficient catalytic arylmagnesiation of diarylacetylenes and aryl(alkyl)acetylenes is accomplished by NiCl2·6H2O at r.t. in the absence of stabilising ligands. The corresponding tetra-substituted alkenes can be obtained in good yields by subsequent treatment with different electrophiles. The Royal Society of Chemistry 2013.
Cross-coupling of aryl/alkenyl silyl ethers with grignard reagents through nickel-catalyzed CO bond activation
Zhao, Fei,Yu, Da-Gang,Zhu, Ru-Yi,Xi, Zhenfeng,Shi, Zhang-Jie
supporting information; experimental part, p. 1001 - 1003 (2011/12/05)
CO activation and its application have drawn much attention since oxygen-based electrophiles are easily available, less toxic, and more environmentally benign. This letter presents systematically results on the Ni-catalyzed KumadaTamaoCorriu coupling based on siloxy arenes/alkenes, which provides a new strategy of silyl protection/CC bond formation sequence in organic synthesis.
Effect of alkyl substituents on photorelease from butyrophenone derivatives
Muthukrishnan, Sivaramakrishnan,Sankaranarayanan, Jagadis,Pace, Tamara C. S.,Konosonoks, Armands,Demichiei, Mariel E.,Meese, Michael J.,Bohne, Cornelia,Gudmundsdottir, Anna D.
experimental part, p. 1393 - 1401 (2010/06/11)
"Chemical Equation Presented" Photolysis of la yields 4a in argon-saturated methanol, whereas 1b is photostable. Laser flash photolysis of 1a in acetonitrile shows formation of biradical 2a (λmax = 340 nm, τ = ～60 ns), which undergoes intersystem crossing to form Z-3a (λmax = 380 nm, τ = 270 ns) and E-3a (λ max = 380 nm, τ = 300 ms). Z-3a regenerates the starting material, whereas E-3b undergoes intramolecular lactonization to release the alcohol moiety and form 4a. Similar laser flash photolysis of lb shows formation of biradical 2b (λmax = 340 nm, τ = 1.9 μs in acetonitrile), which is longer-lived than 2a is. However, 2b only undergoes intersystem crossing to form Z-3b (λmax = 380 nm, τ = 4.3 μs). Calculations demonstrate that intramolecular pseudo hydrogen bonding between the OH moiety and the radical centered on the isopropyl carbon in 2b and the bulkiness of the isopropyl group prevent the necessary rotation to form E-3b. In comparison, 2a does not form an intramolecular pseudo hydrogen bond between the methylene radical center and the OH group, and as a consequence, it undergoes intersystem crossing to form both E- and Z-3a.
Synthesis and biological activity of novel phenyltriazolinone derivatives
Wu, Qiongyou,Wang, Guodong,Huang, Shaowei,Lin, Long,Yang, Guangfu
scheme or table, p. 9024 - 9034 (2011/03/20)
Phenyltriazolinones are one of the most important classes of herbicides targeting the protoporphyrinogen oxidase enzyme. A series of triazolinone derivatives containing a strobilurin pharmacophore were designed and synthesized with the aim of discovering new phenyltriazolinone analogues with high activity. The herbicidal activity of the synthesized compounds was assayed and some of the test compounds displayed moderate herbicidal activity at 150 g ai/ha.
CHEMICAL COMPOUNDS
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Page 56-57, (2010/02/06)
The present invention relates to cyclic amine derivatives of formula(I) (I)whereinR represents halogen, C1-4 alkyl, cyano, C1-4 alkoxy, trifluoromethyl or trifluoromethoxy;R1 represents hydrogen, halogen, C3-7cycloalkyl, hydroxy, nitro, cyano or C1-4 alkyl optionally substituted by halogen, cyano or C1-4 alkoxy;R2 represents hydrogen or C1-4 alkyl;R3 and R4 independently represent hydrogen, cyano, C1-4 alkyl or R3 together with R4 represents C3-7 cycloalkyl;R5 represents trifluoromethyl, S(O)t C 1-4 alkyl, C1-4 alkyl, C1-4 alkoxy, trifluoromethoxy, halogen or cyano;R6 represents hydrogen or (CH2)rR7;R7 represents hydrogen, C3-7 cycloalkyl, NH(C1-4alkylOC1-4alkoxy), NH(C1-4alkyl), N(C1-4alkyl)2, OC(O)NR9R8, NR8C(O)R9 or C(O)NR9R8;R9 and R8 independently represent hydrogen, C1-4 alkyl or C3-7 cycloalkyl; m represents zero or an integer from 1 to 4;n represents 1 or 2;p is zero or an integer from 1 to 3;q is an integer from 1 to 3;r is an integer from 1 to 4;t is 0, 1 or 2;provided that when m is 0, p is 2, q, r and n represent 1, R1, R2,R3, R4, R5 and R7 are hydrogen and R is chlorine, R5 is not iodine; and pharmaceutically acceptable salts and solvates thereof; process for their preparation and their use in the treatment of conditions mediated by tackykinins and/or by selective inhibition of serotonin reuptake transporter protein.
