Results 71 to 80 of about 114,544 (214)

Controlled Synthesis of CD2H-ketones

Selective deuteration is an important chemical challenge. In particular, the synthesis of compounds containing partially deuterated groups such as CD2H is very difficult and lacks general methods.
Pankaj Kumar (17172661), Graham Pattison (17165011)   +1 more
core   +1 more source

Associations of body condition score, body condition score change, and hyperketonemia with mastitis, reproduction, and milk production

Journal of Dairy Science
: Body condition score and hyperketonemia (HYK) have been associated with diseases, fertility, and culling, but data are contradictory about their association with pregnancy loss.
K.C. Krogstad, B.J. Bradford
doaj   +1 more source

High chemoselectivity in the phenol synthesis

Beilstein Journal of Organic Chemistry, 2011
Efforts to trap early intermediates of the gold-catalyzed phenol synthesis failed. Neither inter- nor intramolecularly offered vinyl groups, ketones or alcohols were able to intercept the gold carbenoid species. This indicates that the competing steps of
Matthias Rudolph, Melissa Q. McCreery, Wolfgang Frey, A. Stephen K. Hashmi   +3 more
doaj   +1 more source

ENOL CONTENT OF 2-FORMYL KETONES (HYDROXYMETHYLENE KETONES)

, 2022
The enol content of some hydroxymethylene ketones has been ...
MISHRI MLI BOKADIA, S. S. DESHAPANDE
core   +1 more source

General Direct Transformation of Secondary Amides to Ketones via Amide Activation

, 2012
Carbon-carbon bond formation and functional group transformation are two cornerstones of organic synthesis. Generally, most of the established methods involve the transformation of a more reactive molecule to a more stable one, while the inverse ...
Xiao, Kaijiong, Huang, Peiqiang, 黄培强, Huang, Yinghong   +3 more
core   +1 more source

Flavouring Group Evaluation 87, Revision 3 (FGE.87Rev3): Consideration of bicyclic secondary alcohols, ketones and related esters evaluated by JECFA (63rd meeting) structurally related to bicyclic secondary alcohols, ketones and related esters evaluated in FGE.47Rev1

EFSA Journal
The Panel on Food Additives and Flavourings (FAF) of the European Food Safety Authority was requested to consider evaluations of flavouring substances assessed since 2000 by the Joint FAO/WHO Expert Committee on Food Additives (the JECFA) and to decide ...
EFSA Panel on Food Additives and Flavourings (FAF), Laurence Castle, Monica Andreassen, Gabriele Aquilina, Maria Bastos, Polly Boon, Biagio Fallico, Rex FitzGerald, María José Frutos Fernández, Bettina Grasl‐Kraupp, Ursula Gundert‐Remy, Rainer Gürtler, Eric Houdeau, Marcin Kurek, Henriqueta Louro, Patricia Morales, Sabina Passamonti, Romualdo Benigni, Gisela Degen, Karl‐Heinz Engel, Maria Carfí, Carla Martino   +21 more
doaj   +1 more source

Ruthenium(II) complex catalysts bearing a pyridyl-supported pyrazolyl-imine ligand for transfer hydrogenation of ketones

, 2009
A new class of hemilabile unsymmetrical 2-(1-arylimino)-6-(pyzazol-1-yl)pyridine ligands and their ruthenium(II) and nickel(II) NNN complexes were synthesized.
Yan, Shenggang, Zhao, Miao, Yu, Zhengkun, Li, Yang, 余正坤   +4 more
core   +1 more source

Cyanosilylation of ketones catalyzed by quaternary ammonium salt and N-oxide

, 2004
Dibenzyldimethyl ammonium bromide and triethanolamine N-oxide catalyze the formation of cyanohydrin trimethylsilyl ethers of ketones in 80-99 ...
Feng, ZM, Chen, FX, Feng, ZM, Sichuan Univ, Coll Chem, Minist Educ, Key LGreen Chem & Technol, Chengdu 610064, Peoples R China., Zhou, H, Qin, B, Zhang, GL   +5 more
core  

Ketones from Nickel-Catalyzed Decarboxylative, Non-Symmetric Cross-Electrophile Coupling of Carboxylic Acid Esters

, 2019
A new strategy for the synthesis of ketones is presented based upon the decarboxylative coupling of N-hydroxyphthalimide (NHP) esters with S-2-pyridyl thioesters. The reactions are selective for the cross-coupled product because NHP esters act as radical
Brian P., Cary, Daniel, Weix, Samuel H., Gellman, Peyton, Beyer, Jiang, Wang   +4 more
core   +1 more source

Enantioselective Copper-Catalyzed Reductive Coupling of Alkenylazaarenes with Ketones [PDF]

, 2012
Catalytic enantioselective methods for the preparation of chiral azaarene-containing compounds are of high value. By combining the utility of copper hydride catalysis with the ability of C=N-containing azaarenes to activate adjacent alkenes toward ...
Lam, Hon Wai, Saxena, Aakarsh, Choi, Bonnie, Bonnie Choi, Hon, Lam Wai, Hon Wai Lam, Aakarsh Saxena   +6 more
core   +1 more source