By Shinji Murai
Within the previous few years a wide repetoire of equipment for the activation of unreactive natural functionalities and for his or her use in natural synthesis has been constructed. during this quantity, parts starting from the activation of C-H bonds to the chemical transformation of dinitrogen are authoritatively mentioned through prime specialists within the box. To turn on ability in an effort to cleave in a different way inert chemical bonds. The cleavage and formation of chemical bonds is prime to natural synthesis; those new activation methodologies make hitherto infeasible reactions tremendous effortless and create new possibilities for leading edge natural differences, for either and academia. this can be the 1st ebook that gives a radical and well timed insurance of either inorganic and natural artificial points of bond activation, hence giving a wide evaluation of the sector and permitting either inorganic and natural chemists prepared entry to the methodologies concerned.
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Extra info for Activation of Unreactive Bonds and Organic Synthesis (Topics in Organometallic Chemistry, Volume 3)
Sample text
These observations indicate that the reactive fragment [Cp*Ir(PMe3)] can either coordinate to the π system of ethylene or activate the C–H bond in competitive reactions [120]. The π complex cannot be an intermediate in C–H activation, unlike the situation for benzene activation by [Cp*Rh(PMe3)]. Isotope effect studies were performed on this system using deuterated ethylenes. 18) vs. 49) confirms that an intermediate different from the π-complex must be involved in the C–H activation reactions [121].
As for this type of carbonylation reaction, Moore et al. have reported the first example of the highly selective carbonylation of aromatic ketone with the aid of ruthenium complex as the catalyst [5]. The reaction of pyridine, CO, and 1-hexene was carried out in the presence of Ru3(CO)12 at 150°C to give α-acylated pyridines (Eq. 25). A number of olefins can be used in this system. Terminal olefins as small as ethylene and as large as 1-eicosene afford the corresponding linear pyridyl ketones as the major products.
4 Addition of C–H Bonds to Carbon-Carbon Double Bonds. . . Addition of C–H Bonds to Carbon-Carbon Triple Bonds . . . Coupling of C–H Bonds, Carbon Monoxide, and Olefins. . . . Insertion of Carbon Monoxide and Isocyanide into the C–H Bond 48 56 58 60 3 Catalytic Dehydrogenation of Alkanes and Arenes. . . . . 2 Dehydrogenation of Alkanes and Arenes. . . . . . . . Dehydrogenative Silylation of Alkanes and Arenes . . . . . 61 64 4 Hydroacylation with Aldehydes. . .