▶ Palladium(II)-NHC complexes containing benzimidazole ligand as a catalyst for C-N bond formation (pages 163–167), Öznur Doǧan, Serpil Demir, İsmail Özdemir and Bekir etinkaya
* A convenient method for amination reaction is presented by functional Pd
NHC complexes. Abstract
▶ Thermoregulated ligand–palladium-catalyzed Suzuki reaction in water (pages 168–172) Ning Liu, Chun Liu, Bo Yan and Zilin Jin
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Article first published online: 15 NOV 2010 | DOI: 10.1002/aoc.1736
An efficient and recyclable protocol for the Suzuki reaction in water has been developed based on the cloud point of thermoregulated ligand Ph2P(CH2CH2O)nCH3 (n = 22). The method allows the preparation of a variety of biaryls in high yields and the catalytic system can be recycled four times with high efficiency. Abstract
▶ Palladium(II) complexes of Y,C,Y-chelated phosphines: synthesis, structure, and catalytic activity in Suzuki–Miyaura reaction (pages 173–179), Tomáš Řezníček, Libor Dostál, Aleš Růžička, Jiří Kulhánek, Filip Bureš and Roman Jambor
▶ Phosphines L1PPh2 (1) and L2PPh2 (2) containing different Y,C,Y-chelating ligands were used for the synthesis of the Pd(II) complexes. The catalytic activity of the prepared compounds, which showed different coordination arrangements of the central Pd(II) atom, was tested in the Suzuki–Miyaura cross-coupling reactions. Abstract
▶ Triphenylantimony(V) o-amidophenolates with unsymmetrical N-aryl group for a reversible dioxygen binding (pages 180–189), Andrey I. Poddel'sky, Yury A. Kurskii, Alexandr V. Piskunov, Nikolay V. Somov, Vladimir K. Cherkasov and Gleb A. Abakumov
New triphenylantimony(V) o-amidophenolates of (AP-R1,R2)SbPh3 type with (un)symmetrically substituted N-aryl groups were examined for dioxygen activity. The unsymmetrical complexes form geometrical isomers of spiroendoperoxide with different dispositions of peroxide group and N-aryl fragment (less shielded isomer A and more shielded isomer B). The isomer A prevails over isomer B, reflecting the possibility of steric control on dioxygen-binding reaction. Abstract
▶ Immobilized copper catalyst for atom transfer radical addition and polymerization (pages 190–197), Lin Wang, Xinhua Yan, Zhifeng Fu, Yun Dai and Yan Shi
A novel multidentate amine grafted on silica gel and magnetic microsphere was prepared successfully. And it was used as ligand for CuCl in ATRA of CCl4 with MMA and methyl trichloroacetate (MTCA) with St repeatedly and in ATRP of St initiated by 1,1,1,3-tetrachloro-3-phenylpropane (TCPP) and MMA initiated by methyl 2-methyl-2,4,4,4-tetrarchlorobutyrate (MMTCB). Abstract
▶ Synthesis and characterization of some bis(cyclopentadienyl)titanium(IV) complexes with internally functionalized oximes(LH): sol–gel transformations of Cp2TiCl2, Cp2TiClL and Cp2TiL2 to nano-sized anatase titania (pages 198–206), Archana Chaudhary, Namita Sharma, Veena Dhayal, Arpita Saxena, Meena Nagar and Rakesh Bohra
Some complexes of bis(cyclopentadienyl)titanium(IV) with internally functionalized oximes have been synthesized and characterized. Oxime ligand appears to bind titanium via N and O in a dihapto (η 2-N,O) manner in all the complexes in solid state. Sol-gel transformations of Cp2TiCl2, Cp2TiClL and Cp2TiL2 yield nano-sized anatase titania as characterized by XRD, SEM, IR and Raman spectra. Abstract
▶ Selective O-allylation of bisphenol A: toward a chloride-free route for epoxy resins (pages 207–211), Jimmy A. van Rijn, Marieke C. Guijt, Elisabeth Bouwman and Eite Drent
A new chloride-free route towards epoxy resins is proposed, for which selective O-allylation of bisphenol A is crucial. Both ruthenium and palladium catalysts are capable of selectively performing single and double O-allylation. The use of an excess of diallyl ether as allylating agents results in relatively high yields and selectivity for the bisallyl ether of bisphenol A. Abstract
▶ Scope of the allylation reaction with [RuCp(PP)]+ catalysts: changing the nucleophile or allylic alcohol (pages 212–219), Jimmy A. van Rijn, Marieke C. Guijt, Dwight de Vries, Elisabeth Bouwman and Eite Drent
Allylation reaction with different allylic alcohols as allyl donor and several nucleophilic substrates were performed, leading to intriguing observations in both activity and selectivity of the [RuCp(PP)]+ catalysts. Abstract
▶Preparation of a new composite by reaction of SnBu3Cl with TiCl4 in the presence of NH4OH-photocatalytic degradation of indigo carmine (pages 220–225) , M. G. Coelho, F. V. de Andrade, G. M. de Lima, R. Augusti, M. P. Ferreira, D. A. Maria and J. D. Ardisson
Reactions of SnBu3Cl, TiCl4 and NH4OH in ethanol followed by pyrolysis of the product in O2 or H2 yielded new SnO2TiO2-based composites. The resulting materials were employed in experiments of photocatalytic degradation of indigo carmine, effecting the discoloration and fragmentation of the dye. Abstract
▶ N-heterocyclic carbene complexes of Rh(I) and electronic effects on catalysts for 1,2-addition of phenylboronic acid to aldehydes (pages 226–232) , Hayati Türkmen and Bekir etinkaya
1,3-Diarylsubstituted imidazolinium salts, with alkylated backbone and their rhodium(I) complexes, 4, were prepared. The activity of NHCs in 4 was explored with the 1,2-addition of phenylboronic acid to aldehydes. Abstract
▶ Polyethylene glycol-bound Ru catalyst for asymmetric transfer hydrogenation of aromatic ketones in water (pages 233–237), Zhongqiang Zhou and Qiong Ma
A new polyethylene glycol-supported chiral monosulfonamide was synthesized from (R,R)- 1,2- diaminocyclohexane and shown to act as ligand for ruthenium(II) catalyzed asymmetric transfer hydrogenation of aromatic ketones in neat water using sodium formate as the hydrogen source. Abstract
▶ Cerium-catalyzed tandem synthesis of 2-substituted benzothiazoles in PEG (pages 238–240), Hui-Le Jin, Tian-Xing Cheng and Jiu-Xi Chen
An efficient and convenient condensation reaction of 2-aminothiophenol with aldehydes catalyzed by a catalytic amount of ceric ammonium nitrate in polyethylene glycol was investigated. As a result, a set of diverse 2-substituted benzothiazoles such as 2-phenylbenzothiazole as well as its p-Me, p-NO2, p-F, p-Cl, p-Br, o-OMe, p-OMe and 2-furyl, 2-pyridyl and styryl derivatives were obtained in good to excellent yields for 5 h at room temperature. Additionally, the catalyst system was recovered and reused several times without evident loss in activity. Abstract