1149-18-4Relevant articles and documents
Rhodium-catalyzed coupling reaction of aroyl chlorides with alkenes
Sugihara, Toru,Satoh, Tetsuya,Miura, Masahiro,Nomura, Masakatsu
, p. 1765 - 1772 (2004)
Aroyl chlorides react with acyclic and cyclic alkenes in the presence of a rhodium catalyst to give Mizoroki-Heck type and cyclization products, respectively. A rhodium-ethylene complex, [{RhCl(C2H 4)2}2], showed excellent performance for these reactions. Notably, the reactions can be conducted effectively under base- and phosphane-free conditions.
Catalytic activity of Pd dithiolate complexes with large-bite-angle diphosphines in Heck coupling reactions
Mane, Pravin A.,Neogy, Suman,Dey, Sandip
, (2020)
Palladium(II) complexes of aryl dithiolates and wide-bite-angle diphosphines Xantphos and dppf have been developed as efficient catalysts in Suzuki and Suzuki carbonylation reactions. The catalytic activity of these highly stable, discrete and charged complexes was investigated in Heck coupling reactions of styrene and a variety of aryl bromides. Under optimized reaction conditions these palladium complexes showed excellent activity with high turnover number (6 × 106) and high turnover frequency (4 × 105 h?1). The effect of bite angle of diphosphines on the catalytic activity of the complexes [Pd2(P∩P)2(SC12H8S)]2(OTf)4 followed the trend P∩P = Xantphos > dppf > dppe as the order of their bite angles. The catalyst could be reused, and after three cycles the formation of significant amount of Pd nanoparticles was noticed, which were characterized using powder X-ray diffraction, energy-dispersive X-ray analysis and transmission electron microscopy. The high catalytic activity has been attributed to the Pd nanoparticles.
Air-Driven Potassium Iodide-Mediated Oxidative Photocyclization of Stilbene Derivatives
Matsushima, Tomoya,Kobayashi, Sayaka,Watanabe, Soichiro
, p. 7799 - 7806 (2016)
A new method has been developed for the potassium iodide-mediated oxidative photocyclization of stilbene derivatives. Compared with conventional iodine-mediated oxidative photocyclization reactions, this new method requires shorter reaction times and affords cyclized products in yields of 45-97%. This reaction proceeds with a catalytic amount of potassium iodide and works in an air-driven manner without the addition of an external scavenger. The radical-mediated oxidative photocyclization of stilbene derivatives using TEMPO was also investigated.
Silica-supported bidentate arsine palladium(0) complex: A highly active and stereoselective catalyst for arylation of conjugated alkenes
Cai, Mingzhong,Huang, Yizheng,Zhao, Hong,Song, Caisheng
, p. 20 - 25 (2003)
A silica-supported bidentate arsine palladium(0) complex has been prepared from 4-oxa-6,7-dichloroheptyltriethoxysilane via immobilization on fumed silica, followed by reacting with potassium diphenylarsenide and palladium chloride, and then the reduction with hydrazine hydrate. The complex has been characterized by X-ray photoelectron spectroscopy and it is a highly active and stereoselective catalyst for arylation of styrene and acrylic acid with aryl halides affording a variety of trans -stilbenes and substituted trans -cinnamic acids in high yields.
Macrocyclic Pd(II) dithiolate complexes as catalysts in Heck reactions
Mane, Pravin A.,Dey, Sandip,Vivekananda
, p. 25 - 29 (2017)
The supramolecular palladium dithiolate complexes, [Pd2(dppe)2{S(C6H4)nS}]2(OTf)4and [Pd2(dppe)2(SCH2C6H4CH2S)]
Ansa macrolides as molecular workbenches for stereoselective additions to achiral (E) olefins
Mulzer, Johann,Boehm, Ingo,Bats, Jan-W
, p. 9643 - 9646 (1998)
Highly stereocontrolled additions to achiral acyclic (E) olefins are achieved via incorporation into an ansa macrolide with a nonracemic stilbene diol (molecular workbench approach).
Tandem Acceptorless Dehydrogenative Coupling-Decyanation under Nickel Catalysis
Babu, Reshma,Balaraman, Ekambaram,Midya, Siba P.,Subaramanian, Murugan,Yadav, Vinita
, p. 7552 - 7562 (2021/06/28)
The development of new catalytic processes based on abundantly available starting materials by cheap metals is always a fascinating task and marks an important transition in the chemical industry. Herein, a nickel-catalyzed acceptorless dehydrogenative coupling of alcohols with nitriles followed by decyanation of nitriles to access diversely substituted olefins is reported. This unprecedented C=C bond-forming methodology takes place in a tandem manner with the formation of formamide as a sole byproduct. The significant advantages of this strategy are the low-cost nickel catalyst, good functional group compatibility (ether, thioether, halo, cyano, ester, amino, N/O/S heterocycles; 43 examples), synthetic convenience, and high reaction selectivity and efficiency.
Highly selective electroreductive linear dimerization of electron-deficient vinylarenes
Ning, Shulin,Zheng, Lianyou,Bai, Ya,Wang, Shutao,Wang, Siyu,Shi, Lingling,Gao, Qiansong,Che, Xin,Zhang, Zhuoqi,Xiang, Jinbao
supporting information, (2021/11/16)
A direct electroreductive dimerization of electron-deficient vinylarenes for the synthesis of 1,4-diarylbutane has been developed using a simple undivided cell with inexpensive carbon electrodes at room temperature. The control and deuterium-labeling experiments of electroreductive dimerization suggest that the hydrogen source comes from the solvent CH3CN. This protocol provides a mild and efficient route for the construction of C–C bond in moderate to good yields with high regioselectivity and broad substrate scope.
