Results 41 to 50 of about 672 (165)

Gold(I)-Catalyzed Aromatization: Expeditious Synthesis of Polyfunctionalized Naphthalenes

iScience, 2019
Summary: A gold-catalyzed 6-endo-dig carbocyclization of alkyne with the pendent diazo group is reported. It provides an expeditious approach for the synthesis of multi-functionalized naphthalene derivatives under mild conditions.
Cheng Zhang, Kemiao Hong, Shanliang Dong, Chao Pei, Xiaolu Zhang, Ciwang He, Wenhao Hu, Xinfang Xu   +7 more
doaj   +1 more source

Chemical Syntheses of 3′ and 5′ Phosphorylated Oligonucleotides: An Overview

European Journal of Organic Chemistry, Volume 29, Issue 21, 4 June 2026.
This review provides an overview of the various chemical methods employed in the synthesis of oligonucleotides bearing a phosphate group at their 3′ or 5′ end. Notably, it presents modified phosphoramidites and supports developed for this purpose. Oligonucleotides (ON) with a phosphate monoester group at their 3′ or 5′ end have applications in many ...
Rémy Lartia
wiley   +1 more source

Synthesis of Polyfunctionalized Pyrroles by a PPh3-Promoted Condensation Reaction Between Ammonium Acetate, Dialkyl Acetylenedicarboxylate and Arylglyoxals [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2017
A simple and efficient synthesis of some polyfunctionalized pyrrole derivatives by a triphenylphosphine-promoted condensation reaction between dialkyl acetylenedicarboxylates, arylglyoxals, and ammonium acetate is described.
Hossein Anaraki-Ardakani, Parisa Nkomanesh   +1 more
doaj  

Enantioselective Rhodium‐Catalyzed Cycloisomerization of 1,5‐Bis(allenes) to Access 1,2‐cis‐Ethynyl‐ and Vinyl‐Substituted Five‐Membered (Hetero)Cycles

Angewandte Chemie, Volume 137, Issue 40, September 26, 2025.
The enantioselective Rh‐catalyzed cycloisomerization of 1,5‐bis(allenes) is reported for the preparation of 1,2‐cis‐ethynyl‐ and vinyl‐substituted (hetero)cyclic products in high yields and with excellent diastereo‐ and enantioselectivities. This method leads to the preparation of a valuable chiral building block in organic synthesis including ...
Farhad Panahi, Marzieh Samadani, Felix Bauer, Bernhard Breit   +3 more
wiley   +2 more sources

Fujiwara-Moritani reaction: challenges and new opportunities

Tetrahedron Chem
Fujiwara-Moritani reaction has proven to be robust for the efficient construction of polyfunctionalized olefins and cyclic skeletons. Recent advances toward greener systems, compatibility with strongly coordinating heterocycle substrates and sterically ...
Xiaojian Chen, Jun Zhang, Yang Gao, Qian Chen, Yanping Huo, Xianwei Li   +5 more
doaj   +1 more source

The polyfunctionality of Coptic Egyptian relative complementisers

Proceedings of the International Conference on Head-Driven Phrase Structure Grammar, 2014
The present study is concerned with the complex ways in which alternating relative complementisers in Coptic are employed as a morphological flagging device for unbounded dependencies in various types of relative clause constructions and wh questions.
Berthold Crysmann, Chris H. Reintges
openaire   +3 more sources

New Piperazine Derivatives Synthesized from Thio-Substituted Polyhalogeno-2-nitro-1,3-butadienes

E-Journal of Chemistry, 2010
It is known that polyhalogeno-nitro-1,3-butadienes are important starting materials for the synthesis of polyfunctionalized bioactive heterocycles.
S. Goksin Aydinli, Cemil Ibis
doaj   +1 more source

One-pot and metal-free synthesis of 3-arylated-4-nitrophenols via polyfunctionalized cyclohexanones from β-nitrostyrenes

Beilstein Journal of Organic Chemistry, 2020
β-Nitrostyrenes underwent a Diels–Alder reaction with Danishefsky’s diene to afford cyclohexenes together with the corresponding hydrolyzed products, 3-arylated-5-methoxy-4-nitrocyclohexanones.
Haruyasu Asahara, Minami Hiraishi, Nagatoshi Nishiwaki   +2 more
doaj   +1 more source

Polyfunctionality and inflectional economy

Linguistic Issues in Language Technology, 2014
This paper serves two purposes. It is a summary of much work concerning One compelling kind of evidence for the autonomy of a language’s morphology is the incidence of inflectional polyfunctionality, the systematic use of the same morphology to express distinct but related morphosyntactic content.
openaire   +2 more sources

Recent Synthetic Advances in C–H/N–H Functionalization of 1H‐Pyrazoles: Diverse Strategies Across Variously Substituted Scaffolds

The Chemical Record, Volume 25, Issue 12, December 2025.
Systematic overview of pyrazole functionalization reactions from C‐5 to N−H. It covers different strategies, from traditional cross‐coupling of prefunctionalized pyrazoles to more efficient direct functionalizations. This review briefly and systematically overviews C–H and N–H functionalization reactions of pyrazoles, aimed at creating new CC and C ...
Karolina Dzedulionytė Müldür, Asta Žukauskaitė, Algirdas Šačkus, Eglė Arbačiauskienė   +3 more
wiley   +1 more source