Results 241 to 250 of about 2,531,644 (304)

Ring expansion reactions in organonickel chemistry

Journal of the Chemical Society D: Chemical Communications, 1970
In contrast with the reactions of NiL4(L = tertiary phosphine), Ni(ButNC)4 reacts with (CF3)2CO and (CF3)2CNH to give five-membered-ring compounds (ButNC)2[graphic omitted](X = O or NH) in an almost stereoselective 3- to 5-ring transformation.
A. Greco, M. Green, S. K. Shakshooki, F. G. A. Stone   +3 more
openaire   +1 more source

Ring Transformations in Tetrazole Chemistry

Journal f�r Praktische Chemie/Chemiker-Zeitung, 1998
Transformations of heterocycles into tetrazoles as well as conversions of the latter into other rings are reviewed. The literature is covered through early 1998 (material that has been surveyed by Van der Plas [1] and Benson [2] is resumed in abridged fashion).
openaire   +1 more source

ChemInform Abstract: 1‐AZIRINE RING CHEMISTRY

Chemischer Informationsdienst, 1978
AbstractSynthese und Reaktionen von 1‐Azirinen werden untersucht.
V. NAIR, K. H. KIM
openaire   +1 more source

An sp-hybridized all-carboatomic ring, cyclo[18]carbon: Bonding character, electron delocalization, and aromaticity

, 2020
cyclo[18]carbon is an all-carboatomic ring observed recently in experiment. Inspired by the distinctive feature in structure and bonding nature, we explored comprehensively its bonding character, electron delocalization, and aromaticity by quantum ...
Zeyu Liu, T. Lu, Qinxue Chen
semanticscholar   +1 more source

Chemistry of the solanidane ring system

Journal of the Chemical Society C: Organic, 1971
The reaction of acetyldemissidine and acetylsolanidine with cyanogen bromide is described and the results of the lithium aluminium hydride reduction of the bromo-cyanamides so produced are discussed. The hydrolysis of acetyldemissidine bromo-cyanamide under very mild conditions caused a retro-von Braun reaction to afford the initial alkaloid.
J. A. Beisler, Y. Sato
openaire   +1 more source

The application of coffee-ring effect in analytical chemistry

Trends in Analytical Chemistry (TrAC), 2022
Mingwei Yang, Dejian Chen, Jie Hu, Xinyu Zheng, Zu-jin Lin, Haomiao Zhu   +5 more
semanticscholar   +1 more source

A review of fatty epoxide ring opening reactions: Chemistry, recent advances, and applications

Journal of the American Oil Chemists Society, 2022
B. Moser, S. Cermak, K. Doll, J. Kenar, Brajendra K. Sharma   +4 more
semanticscholar   +1 more source

Medicinal chemistry of indole derivatives: Current to future therapeutic prospectives.

Bioorganic chemistry (Print), 2019
Indole is a versatile pharmacophore, a privileged scaffold and an outstanding heterocyclic compound with wide ranges of pharmacological activities due to different mechanisms of action. It is an superlative moiety in drug discovery with the sole property
A. Kumari, R. Singh
semanticscholar   +1 more source

Medium-ring diphosphines: synthesis and transannular chemistry

Coordination Chemistry Reviews, 1998
Abstract Medium-ring diphosphines offer unique opportunities to study the interactions between phosphorus atoms. In addition, monocyclic medium-ring diphosphines may be very useful ligands in transition metal complexes. A number of useful synthetic routes to these compounds have been developed, but further efforts in this direction might be rewarding.
Alder, RW, Read, D
openaire   +1 more source

Comprehensive Heterocyclic Chemistry IV

, 1996
CHEC III is organized in 15 Volumes and closely follows the organization used in the previous edition: Volumes 1 and 2: Cover respectively three- and four-membered heterocycles, together with all fused systems containing a three- or four-membered ...
A. Katritzky, C. Rees, E. Scriven
semanticscholar   +1 more source