Results 311 to 320 of about 421,249 (354)

Asymmetric cycloaddition reactions catalysed by diarylprolinol silyl ethers.

Chemical Society Reviews, 2017
Cycloaddition reactions are among the most important tools for the construction of cyclic compounds in organic synthesis, since these reactions are vital to access natural products and biologically active compounds.
Lydia Klier, Fernando Tur, Pernille H. Poulsen, K. A. Jørgensen   +3 more
semanticscholar   +1 more source

Ruthenium-Catalyzed Synthesis of Dialkoxymethane Ethers Utilizing Carbon Dioxide and Molecular Hydrogen.

Angewandte Chemie, 2016
The synthesis of dimethoxymethane (DMM) by a multistep reaction of methanol with carbon dioxide and molecular hydrogen is reported. Using the molecular catalyst [Ru(triphos)(tmm)] in combination with the Lewis acid Al(OTf)3 resulted in a versatile ...
Katharina Thenert, Kassem Beydoun, J. Wiesenthal, W. Leitner, J. Klankermayer   +4 more
semanticscholar   +1 more source

ETHER AND HUMBUG

Journal of the American Medical Association, 1947
It is a great honor to be asked to participate in this centennial celebration of the first public use of ether anesthesia under the auspices of this great medical school and the internationally famous Massachusetts General Hospital, an institution which, in addition to its pioneer use of ether, has to its credit the revelation of the true nature of ...
openaire   +4 more sources

Living Cationic Polymerization of Vinyl Ethers through a Photoinduced Radical Oxidation/Addition/Deactivation Sequence.

Angewandte Chemie, 2017
A new photoinitiating system for living cationic polymerization of vinyl ethers is reported. In the current approach, visible-light irradiation of dimanganese decacarbonyl (Mn2 (CO)10 ) in the presence of an alkyl bromide results in the formation of ...
M. Çiftçi, Y. Yoshikawa, Y. Yagcı
semanticscholar   +1 more source

Iridium-Catalyzed Regio- and Enantioselective Hydroarylation of Alkenyl Ethers by Olefin Isomerization.

Angewandte Chemie, 2017
Iridium-catalyzed hydroarylation of alkenyl ethers, such as allylic and homoallylic ethers, by C-H bond activation gave high yields of the corresponding addition products, where the aryl groups were selectively installed at the α-carbon atom to the ...
Yusuke Ebe, Mitsuki Onoda, T. Nishimura, H. Yorimitsu   +3 more
semanticscholar   +1 more source

Deoxygenation of Ethers To Form Carbon-Carbon Bonds via Nickel Catalysis.

Journal of the American Chemical Society, 2017
In this article a successful protocol was developed to construct carbon-carbon bonds by the extrusion of the O atom of ethers via nickel catalysis in the presence of reductants. This methodology is featured as a highly economic route to construct sp3-sp3
Zhi-Chao Cao, Zhangjie Shi
semanticscholar   +1 more source

Photocatalytic α-Acylation of Ethers.

Organic Letters, 2017
Direct coupling of ethers and acyl halides was promoted by a binary catalytic system comprising an Ir-based photocatalyst and a Ni complex under blue-light irradiation.
Zhongdong Sun, N. Kumagai, M. Shibasaki
semanticscholar   +1 more source

Fluorodecarboxylation for the Synthesis of Trifluoromethyl Aryl Ethers.

Angewandte Chemie, 2016
The synthesis of mono-, di-, and trifluoromethyl aryl ethers by fluorodecarboxylation of the corresponding carboxylic acids is reported. AgF2 induces decarboxylation of aryloxydifluoroacetic acids, and AgF, either generated in situ or added separately ...
Qing-Wei Zhang, Andrew T Brusoe, Vincent Mascitti, Kevin D. Hesp, D. Blakemore, J. Kohrt, J. Hartwig   +6 more
semanticscholar   +1 more source

Catalytic Hydrogenolysis of Aryl Ethers: A Key Step in Lignin Valorization to Valuable Chemicals

, 2015
Lignin is a robust biomacromolecule (or a polymer) that gives structural integrity to plants and constitutes 25–35% of the woody biomass. Lignin is inedible, barely used, and contains mostly aromatic building blocks.
Muhammad Zaheer, R. Kempe
semanticscholar   +1 more source

Michael Addition Catalyzed by Chiral Secondary Amine Phosphoramide Using Fluorinated Silyl Enol Ethers: Formation of Quaternary Carbon Stereocenters.

Angewandte Chemie, 2015
A chiral secondary amine phosphoramide was developed and identified as a powerful catalyst for the Mukaiyama-Michael addition of fluorinated enol silyl ethers to tetrasubstituted olefins. The resulting products are obtained with high enantioselectivities
Jin‐Sheng Yu, Fumin Liao, Wei-Ming Gao, Kui Liao, R. Zuo, Jian Zhou   +5 more
semanticscholar   +1 more source