Results 271 to 280 of about 19,002,772 (320)

Directoids and directed groups

Algebra Universalis, 1995
\textit{J. Ježek} and \textit{R. Quackenbush} [ibid. 27, No. 1, 49-69 (1990; Zbl 0699.08002)] have introduced directoids as groupoids corresponding exactly to up-directed posets (viz \(a \leq b\) iff \(ab = b\)). In this paper, this concept is further investigated, both in its own and in combination with an abelian group structure.
Gardner, B. J., Parmenter, M. M.
openaire   +2 more sources

Nickel-Catalyzed Reductive 1,2-Dialkynylation of Alkenes Bearing an 8-Aminoquinoline Directing Group.

Organic Letters, 2019
An unprecedented nickel-catalyzed reductive 1,2-dialkynylation of alkenes bearing an 8-aminoquinoline directing group has been developed. This method proceeded through a migratory insertion/reductive-coupling process under mild conditions with a wide ...
Rui Pan, Cong Shi, Dongquan Zhang, Yang Tian, Songjin Guo, Hequan Yao, Aijun Lin   +6 more
semanticscholar   +1 more source

C(sp3)–H Bond Arylation and Amidation of Si-Bound Methyl Group via Directing Group Strategy

ACS Catalysis, 2019
Silylmethyl functionalization provides a general and efficient access to diverse organosilanes. The traditional methods for silylmethyl functionalization often involved silylmethylmetals or silylmethylhalides.
Jie Han, Ying‐chuan Qin, Dongbing Zhao
semanticscholar   +1 more source

Switchable C−H Alkylation of Aromatic Acids with Maleimides in Water: Carboxyl as a Diverse Directing Group

ChemCatChem, 2019
A ruthenium‐catalyzed protocol to access conjugate addition or decarboxylative conjugate addition of aromatic acids with maleimides has been developed. The reaction shows interesting chemoselectivity with different substituted benzoic acids. The reaction
Fan Pu, Zhong-Wen Liu, Lin‐Yan Zhang, Juan Fan, Xian‐Ying Shi   +4 more
semanticscholar   +1 more source

On directed groups

Siberian Mathematical Journal, 1989
V. M. Kopytov, Z. I. Dimitrov
openaire   +1 more source

Factor group of a direct product of Abelian groups by their direct sum

Mathematical Notes of the Academy of Sciences of the USSR, 1981
openaire   +2 more sources

On directed groups

Algebra and Logic, 1971
openaire   +2 more sources

On Direct Factors in Groups

Journal of the London Mathematical Society, 1960
openaire   +1 more source

Enantioselective Pallada‐Electrocatalyzed C−H Activation by Transient Directing Groups: Expedient Access to Helicenes

Angewandte Chemie - International Edition, 2020
Uttam Dhawa, Cong Tian, Tomasz Wdowik
exaly  

Decoding Directing Groups and Their Pivotal Role in C−H Activation

Chemistry - A European Journal, 2021
Luana A Machado, Leandro F Pedrosa, Eufrânio N Da Silva Junior   +2 more
exaly