Results 91 to 100 of about 17,602 (278)

Electrochemical Synthesis of Benzo[b]Phosphole Oxides via Dehydrogenative Annulation Using 1,4‐Diazabicyclo [2.2.2]Octane as a Mediator

ChemElectroChem
The electrochemical intermolecular annulation of diarylphosphine oxides with alkynes for the synthesis of benzo[b]phosphole oxides has been reported. The reaction proceeded under transition‐metal‐ and oxidant‐free conditions via indirect electrolysis ...
Koichi Mitsudo, Sakura Kinjo, Yasuyuki Okumura, Eisuke Sato, Riki Kato, Yuta Nishina, Seiji Suga   +6 more
doaj   +1 more source

Measuring Organizational Resilience in a Resource‐Constrained Environment: An Empirical Study of Micro‐and‐Small‐Service‐Enterprises (MSSEs) in Nigeria

Strategic Change, EarlyView.
ABSTRACT There is growing evidence that a preponderance of resilience indicators discussed in management scholarship is often developed with limited consideration of the context in which micro‐and‐small‐service enterprises (MSSEs) operate. Given their strategic relevance to developing economies, it thus becomes necessary to understand the meaning of ...
Justin Okoli, Toyin Samuel Olowogbon, George Chinanu Mbaeyi   +2 more
wiley   +1 more source

Ortho-ester-substituted diaryliodonium salts enabled regioselective arylocyclization of naphthols toward 3,4-benzocoumarins

Beilstein Journal of Organic Chemistry
Cyclic annulation involving diaryliodonium salts is an efficient tool for the construction of two or more chemical bonds in a one-pot process.
Ke Jiang, Cheng Pan, Limin Wang, Hao-Yang Wang, Jianwei Han   +4 more
doaj   +1 more source

Intramolecular cascade annulation triggered by rhodium(III)-catalyzed sequential C(sp2)–H activation and C(sp3)–H amination

Beilstein Journal of Organic Chemistry, 2019
A rhodium(III)-catalyzed intramolecular oxidative annulation of O-substituted N-hydroxyacrylamides for the construction of indolizinones via sequential C(sp2)–H activation and C(sp3)–H amination has been developed.
Liangliang Song, Guilong Tian, Johan Van der Eycken, Erik V. Van der Eycken   +3 more
doaj   +1 more source

Expansion of annulation of allenoates with trifluoroketones: Synthesis of trifluoromethylated dihydropyrans

, 2020
The DABCO-catalyzed [2 + 2] annulation of allenoates with trifluoroketones could be expanded to [4 + 2] annulation to synthesize trifluoromethylated dihydropyrans with trifluoromethyl oxadienes as the electrophilic annulation partners.
Tong Wang (87696), Yanpeng Liu (557370), Jinyi Xu (1748593)   +2 more
core   +1 more source

A green solvent processable, self‐doped N‐annulated perylene butyl tetraester applied as a solar cell cathode interlayer

Polymer International, EarlyView.
A new organic molecular cathode interlayer is presented built upon the perylene butyl tetraester scaffold. The new molecule incorporates N‐annulation and a functional amine group to control optical, electrochemical and physical properties and delivers excellent solar cell performance. Abstract We report a new amino‐bay‐substituted, N‐annulated perylene
Kathryn M Wolfe, Shahidul Alam, Zachary T Gardner, Biswajit Pal, Alexander Harrison, Frédéric Laquai, Chad Risko, Gregory C Welch   +7 more
wiley   +1 more source

1H-Indoles from Deoxybenzoin Schiff Bases by Deprotonation—S_NAr Cyclization

Molecules
A transition metal-free synthesis of 1,2,5-trisubstituted 1H-indoles by a deprotonation–SNAr cyclization sequence from 1-aryl-2-(2-fluoro-5-nitrophenyl)ethan-1-one (deoxy-benzoin) Schiff bases is reported.
Nash E. Nevels, Richard A. Bunce
doaj   +1 more source

System as a Unifying Process: An Onto‐Epistemic Notion of System

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This article proposes an onto‐epistemic notion of system as a relational process of unifying a multiplicity of actuals and abstractions into an actual unity, thereby encompassing concreteness and abstraction onto the same plane. This notion rejects the opposition between constructivism and realism within systems studies, the excessive focus on
Felipe Rodrigues Oliveira e Silva, Sandro Luis Schlindwein   +1 more
wiley   +1 more source

Comparison of Phosphonium and Sulfoxonium Ylides in Ru(II)-Catalyzed Dehydrogenative Annulations: A Density Functional Theory Study

Molecules
Density functional theory calculations have been performed to explore the detailed mechanism of a ruthenium-catalyzed dehydrogenative annulation between α-carbonyl phosphonium ylide (A) and sulfoxonium ylide (B).
Wei Zhou, Lei Zhang, Dan-Yang Liu, Xiaosi Ma, Jie Zhang, Jiajia Kang   +5 more
doaj   +1 more source

Mothers against the natural order: Gender representations and desertion of identities in the drama of disinheriting a son in eighteenth‐century Barcelona  

Gender &History, EarlyView.
ABSTRACT The disinheritance of a firstborn son accustomed to the privileges of exclusion has for centuries been a dramatic event for families, especially if the decision was taken by a woman, the son's own mother. Very few dared to do so, because it symbolised a break with the notion of virtuous, compassionate motherhood; it represented a failure to be
Mariela Fargas Peñarrocha
wiley   +1 more source