Results 91 to 100 of about 1,875 (207)

The synthesis of polyfunctionalized, cyclohexene-based chirons from tartaric acid [PDF]

, 2019
Compound ent-1 as well as certain related homochiral and polyfunctionalized cyclohexenes have been prepared from the 1,2-diacetal 4 that is itself readily derived from L-tartaric acid (3).
Banwell, Martin, Schwartz, Brett, Buckler, Joshua   +2 more
core   +1 more source

Chemistry of Fullerene Epoxides: Synthesis, Structure, and Nucleophilic Substitution-Addition Reactivity

Molecules, 2012
Fullerene epoxides, C₆₀O_n, having epoxide groups directly attached to the fullerene cage, constitute an interesting class of fullerene derivatives.
Yusuke Tajima, Yasuo Shigemitsu, Kazumasa Takeshi, Youhei Numata   +3 more
doaj   +1 more source

POLYFUNCTIONALITY OF ENGLISH QUANTITATIVE WORDS

GISAP:Philological Sciences, 2015
The article in question considers the functioning of quantitative units, their language and speech aspects. The iIntroduction is focused on the most significant items of the reports – definition of numerals, words of weight and measure, aims, methods of investigation, empiric materials applied, evolution modifications and perspectives of further study.
Olha Shumenko, Svitlana Shvachko, Evgeniy Kuprienko   +2 more
openaire   +1 more source

Amine-Mediated Transimination and Aromatization-Triggered Domino Reaction in the Synthesis of Polyfunctionalized 4‑Aminoquinolines

, 2016
Dearomatization provides numerous possibilities for the development of new transformative modes of aromatic compounds. A conceptually novel metal-free multicomponent domino reaction of the dearomatized products of 2-alkynylanilines is developed.
Zhaomeng Han (3192390), Qiuqin He (1830742), Renhua Fan (1652128), Runzhe Song (3192393)   +3 more
core   +1 more source

A NOVEL RING TRANSFORMATION OF NITROPYRIMIDINONE LEADING TO POLYFUNCTIONALIZED PYRIDONES

Polyfunctionalized 2-pyridones are readily prepared by the ring transformation using 3-methyl-5-nitropyrimidin-4(3H)-one with active methylene compounds in the presence of ...
MATSUSHIMA, Kazuo, MORIMURA, Hiromi, マツシマ, カズオ, ニシワキ, ナガトシ, モリムラ, ヒロミ, 有賀, 正裕, 西脇, 永敏, NISHIWAKI, Nagatoshi, タムラ, ミナ, 田村, 美奈, アリガ, マサヒロ, TAMURA, Mina, ARIGA, Masahiro   +12 more
core  

Synthesis of dihydrophenanthridines by a sequence of Ugi-4CR and palladium-catalyzed intramolecular C-H functionalization

Beilstein Journal of Organic Chemistry, 2008
BackgroundSmall polyfunctionalized heterocyclic compounds play important roles in the drug discovery process and in the isolation and structural identification of biological macromolecules. It is expected that ready access to diverse sets of heterocycles
Florence Bonnaterre, Michèle Bois-Choussy, Jieping Zhu   +2 more
doaj   +1 more source

PRAGMATIC POLYFUNCTIONALITY OF WORDS

the article deals with the analysis of the context determined functional polysemy of discourse markers which help communicators during the processes of discourse generation, actualization and perception. The research is based on Russian and English academic speech and the materials of the National Russian Corpus.
openaire   +1 more source

Facile Assembly of Structurally Diverse 2H-Pyrans Enabled by Chloropalladation-Initiated Carboetherification of Alkenes

Molecules
3,6-Dihydro-2H-pyran heterocyclic framework is one of the currently developed heterocyclic building blocks in both pharmaceutical chemistry and organic synthesis, but with significant challenges.
Fanghua Mao, Bowen Wang, Zhengwang Chen, Yin-Long Lai, Huanfeng Jiang, Jianxiao Li   +5 more
doaj   +1 more source

The polyfunctionality of 'still' expressions

Expressions from the semasiological domain of phasal polarity (ʻstillʼ, ʻalreadyʼ, etc.) tend to be highly polyfunctional, with their various uses often extending into a wide range of other linguistic domains, both time-related and non-temporal. Yet these patterns have hitherto been investigated mostly for individual languages or smaller groups.
openaire   +1 more source

Successive Regioselective Metalations of Fused Heterocycles: Synthesis of Polyfunctionalized Furo[3,2‑b]pyridines

, 2016
The furopyridine framework was chosen as a target for a lithiation study, in order to define the most effective conditions leading to the total functionalization of the heterocycle.
Adeline Jasselin-Hinschberger (1950943), Yves Fort (1404295), Corinne Comoy (1950940), Anthony Chartoire (1450696)   +3 more
core   +1 more source