Benzylic Activation And Stereocontrol In Tricarbonyl(arene)chromium Complexes

	Benzylic Activation And Stereocontrol In Tricarbonyl(arene)chromium Complexes Benzylic activation in tricarbonyl(arene)chromium complexes refers to the reactions at the benzylic position of aromatic rings complexed to chromium, chromium(0). Complexation of an aromatic ring to chromium stabilizes both Ion#Anions and cations, anions and Ion#Anions and cations, cations at the Benzyl group, benzylic position and provides a Steric effects, steric blocking element for Diastereomer, diastereoselective Functionality (chemistry), functionalization of the benzylic position. A large number of Stereoselectivity, stereoselective methods for benzylic and homobenzylic functionalization have been developed based on this property. Tricarbonyl(arene)chromium complexes Tricarbonyl(arene)chromium complexes of the type (arene)Cr(CO)3 are readily prepared by heating a solution of chromium hexacarbonyl with arenes, especially electron rich derivatives. The chromium(0) activates the side chain of the arene, facilitating dissociation of a benzylic proton, leaving group, or nucleophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Aromatic Ring In chemistry, aromaticity is a chemical property of cyclic (ring-shaped), ''typically'' planar (flat) molecular structures with pi bonds in resonance (those containing delocalized electrons) that gives increased stability compared to saturated compounds having single bonds, and other geometric or connective non-cyclic arrangements with the same set of atoms. Aromatic rings are very stable and do not break apart easily. Organic compounds that are not aromatic are classified as aliphatic compounds—they might be cyclic, but only aromatic rings have enhanced stability. The term ''aromaticity'' with this meaning is historically related to the concept of having an aroma, but is a distinct property from that meaning. Since the most common aromatic compounds are derivatives of benzene (an aromatic hydrocarbon common in petroleum and its distillates), the word ''aromatic'' occasionally refers informally to benzene derivatives, and so it was first defined. Nevertheless, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Suzuki Cross Coupling is a Japanese multinational corporation headquartered in Minami-ku, Hamamatsu, Japan. Suzuki manufactures automobiles, motorcycles, all-terrain vehicles (ATVs), outboard marine engines, wheelchairs and a variety of other small internal combustion engines. In 2016, Suzuki was the eleventh biggest automaker by production worldwide. Suzuki has over 45,000 employees and has 35 production facilities in 23 countries, and 133 distributors in 192 countries. The worldwide sales volume of automobiles is the world's tenth largest, while domestic sales volume is the third largest in the country. Suzuki's domestic motorcycle sales volume is the third largest in Japan. History In 1909, Michio Suzuki (1887–1982) founded the Suzuki Loom Works in the small seacoast village of Hamamatsu, Japan. Business boomed as Suzuki built weaving looms for Japan's giant silk industry. In 1929, Michio Suzuki invented a new type of weaving machine, which was exported overseas. The company's first 30 y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]