The present invention provides a method represented by Scheme 1:whereinXrepresents I, Br, Cl, alkylsulfonate, or arylsulfonate;Zrepresents optionally substituted aryl, heteroaryl or alkenyl;catalystcomprises a copper atom or ion, and a ligand;baserepresents a Bronsted base; andRrepresents optionally ...
Copper formate (CAS 544-19-4, C2H2CuO4) is a compound consisting of copper, carbon, hydrogen, and oxygen. It is commonly used in various industrial applications, including as a catalyst in organic synthesis and as a precursor for the preparation of other copper-containing compounds. Copper ...
Tsuji. Copper-catalyzed oxidative cleavage of carbon-carbon double bond of enol ethers with molecular oxygen. J. Organomet. Chem., 2005, 690 (23), p. 5378-5382.Tokunaga, M., Shirogane, Y., Aoyama, H., Obora, Y., and Tsuji, Y. 2005. Copper- catalyzed oxidative cleavage of carbon-...
Carbon–oxygen bonds are commonplace in organic molecules, including chiral bioactive compounds; therefore, the development of methods for their construction with simultaneous control of stereoselectivity is an important objective in synthesis. The Williamson ether synthesis, first reported in 18501, is the...
Copper isconsidered to be a noble metal, and as a result is able to resist attack by oxygen. The metal is basically immune to corrosion due to a naturally occurring protective film known as apatinathat forms on the metal's surface. If this protective film, usually consisting of reddish-bro...
When the oxygen is determined by gas chromatography, formation of CO 2 can be suppressed by adding a 0.5% Si-1.5% Ni Cu bath-alloy together with the copper sample or by inserting a spectrographically pure carbon rod into the graphite crucible used for the fusion. When the oxygen is ...
copper (OFHC)—is formed by melting copper and combining it with carbon and carbonaceous gases. The electrolytic copper refining process removes most of the oxygen contained within, resulting in a compound that consists of 99.95–99.99% copper with less than or equal to 0.0005% oxygen. ...
of C–H bonds.1 Introduction2 Carbon–Carbon Bond Formation2.1 Csp–H Bond Functionalization2.2 Csp2–H Bond Functionalization2.3 Csp3–H Bond Functionalization3 Carbon–Heteroatom Bond Formation3.1 Carbon–Oxygen Bond Formation3.2 Carbon–Nitrogen Bond Formation3.3 Carbon–Sulfur Bond Formation4 ...
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Study on Carbon and Oxygen Isotope Composition of the Calcites in Chahe Copper Deposit, Yuanjiang, YunnanNo abstract is available for this article.doi:10.1111/1755-6724.12379_51WANG, YeXU, ZhengqiLI, PingSONG, HaoJohn Wiley & Sons, Ltd....