Anion-π Catalysis Enabled by the Mechanical Bond

Mechanical Bond ◽

We report a series of rotaxane-based anion-π catalysts in which the mechanical bond between a bipyridine macrocycle and an axle containing an NDI unit is intrinsic to the activity observed, including a [3]rotaxane that catalyses an otherwise disfavoured Michael addition in >60 fold selectivity over a competing decarboxylation pathway that dominates under Brønsted base conditions. The results are rationalized by detailed experimental investigations, electrochemical and computational analysis.

Thermodiffusion in multicomponent hydrocarbon mixtures: Experimental investigations and computational analysis

The Journal of Chemical Physics ◽

10.1063/1.3211303 ◽

2009 ◽

Vol 131 (11) ◽

pp. 114505 ◽

Cited By ~ 39

Author(s):

Stefan VanVaerenbergh ◽

Seshasai Srinivasan ◽

M. Ziad Saghir

Keyword(s):

Computational Analysis ◽

Hydrocarbon Mixtures

Activation of Michael Acceptors by Halogen-Bond Donors

Synlett ◽

10.1055/s-0036-1591841 ◽

2017 ◽

Vol 29 (10) ◽

pp. 1307-1313 ◽

Cited By ~ 21

Author(s):

Martin Breugst ◽

Daniel von der Heiden ◽

Eric Detmar ◽

Robert Kuchta

Keyword(s):

Michael Addition ◽

Halogen Bond ◽

Michael Acceptors ◽

The Michael Addition

Extending earlier studies on iodine catalysis, experimental investigations show that various halogen-bond donors can also be employed to accelerate the Michael addition between trans-crotonophenone and indole. Solvent as well as counteranion effects have been analyzed, and kinetic and computational investigations provide additional insights into the mode of activation.

Tuning the Basicity of a Metal-Templated Brønsted Base to Facilitate the Enantioselective Sulfa-Michael Addition of Aliphatic Thiols to α,β-UnsaturatedN-Acylpyrazoles

European Journal of Organic Chemistry ◽

10.1002/ejoc.201501494 ◽

2016 ◽

Vol 2016 (5) ◽

pp. 887-890 ◽

Cited By ~ 18

Author(s):

Xiaobing Ding ◽

Cheng Tian ◽

Ying Hu ◽

Lei Gong ◽

Eric Meggers

Keyword(s):

Michael Addition ◽

Aliphatic Thiols ◽

Experimental Investigations and Computational Analysis on Subsonic Wind Tunnel

International Journal of Trend in Scientific Research and Development ◽

10.31142/ijtsrd23511 ◽

2019 ◽

Vol Volume-3 (Issue-3) ◽

pp. 1708-1711

Author(s):

Rishabh Kumar Sahu ◽

Saurabh Sharma ◽

Vivek Swaroop | Vishal Kumar ◽

Keyword(s):

Wind Tunnel ◽

Computational Analysis ◽

Subsonic Wind Tunnel

Enantioselective synthesis of 2,3-disubstituted trans-2,3-dihydrobenzofurans using a Brønsted base/thiourea bifunctional catalyst

Organic & Biomolecular Chemistry ◽

10.1039/c6ob01326k ◽

2016 ◽

Vol 14 (30) ◽

pp. 7268-7274 ◽

Cited By ~ 15

Author(s):

Diego-Javier Barrios Antúnez ◽

Mark D. Greenhalgh ◽

Charlene Fallan ◽

Alexandra M. Z. Slawin ◽

Andrew D. Smith

Keyword(s):

Tertiary Amine ◽

Michael Addition ◽

Bifunctional Catalyst ◽

Enantioselective Synthesis ◽

The enantioselective synthesis of 2,3-disubstituted trans-2,3-dihydrobenzofuran derivatives via intramolecular Michael addition has been developed using a bifunctional tertiary amine–thiourea catalyst.

Chiral ionic Brønsted acid–achiral Brønsted base synergistic catalysis for asymmetric sulfa-Michael addition to nitroolefins

Chemical Science ◽

10.1039/c2sc20698f ◽

2012 ◽

Vol 3 (11) ◽

pp. 3161 ◽

Cited By ~ 48

Author(s):

Daisuke Uraguchi ◽

Natsuko Kinoshita ◽

Daisuke Nakashima ◽

Takashi Ooi

Keyword(s):

Michael Addition ◽

Bronsted Acid ◽

Brønsted Acid ◽

Synergistic Catalysis ◽

Brönsted Acid ◽

Experimental investigations on the ‘shallow crack effect’, on the 10 MnMoNi 5 5 steel, and computational analysis in the upper shelf by means of the global and local approaches

Nuclear Engineering and Design ◽

10.1016/s0029-5493(98)00322-7 ◽

1999 ◽

Vol 190 (1-2) ◽

pp. 171-190 ◽

Cited By ~ 14

Author(s):

J.-M Pitard-Bouet ◽

M Seidenfuss ◽

M Bethmont ◽

K Kussmaul

Keyword(s):

Computational Analysis ◽

Shallow Crack ◽

Global And Local

Lewis Acid/Brønsted Base Catalyzed Michael Addition to Thioamides

Synfacts ◽

10.1055/s-0034-1378423 ◽

2014 ◽

Vol 10 (08) ◽

pp. 0835-0835

Keyword(s):

Lewis Acid ◽

Michael Addition ◽

Relay Cu(I)/Brønsted Base Catalysis for Phospha ‐Michael Addition/5‐ exo ‐ dig Cyclization/Isomerization of in situ Formed aza ‐Alkynyl o‐ quinone methides with P(O)−H compounds to C3‐Phosphorylated Indoles

Advanced Synthesis & Catalysis ◽

10.1002/adsc.202100275 ◽

2021 ◽

Author(s):

Long Chen ◽

Xiao‐Yan Liu ◽

Jing Zhang ◽

Li Duan ◽

Zhong Wen ◽

...

Keyword(s):

Michael Addition ◽

Base Catalysis ◽

Quinone Methides ◽

ANALYSIS OF BEHAVIOUR OF COMPOSITE ELEMENTS WITH PROFILED STEEL SHEET/LENKIAMŲJŲ KOMPOZITINIŲ ELEMENTŲ, ARMUOTŲ PROFILIUOTAIS METALO LAKŠTAIS, DARBO ANALIZĖ

Journal of Civil Engineering and Management ◽

10.3846/13921525.2001.10531768 ◽

2001 ◽

Vol 7 (6) ◽

pp. 425-432

Author(s):

Gediminas Marčiukaitis ◽

Juozas Valivonis ◽

Andrius Vaškevičius

Keyword(s):

Joint Action ◽

Composite Structures ◽

Steel Sheet ◽

Deformation Modulus ◽

Interface Zone ◽

Factors Affecting ◽

Concrete Layer ◽

Different Types ◽

Mechanical Bond

Joint action at the interface of concrete and profiled steel sheet layers of composite structures can be achieved in various ways. In most cases different types of roughness (embossments) are made inside sheet waves, which increase mechanical bond between concrete and sheets. Behaviour of such structures and particularly of the section at the interface of the layers is not fully investigated. The analysis performed has indicated that calculation methods proposed by various authors give different results. Theoretical and performed experimental investigations have shown that behaviour of interface zone is affected by concrete layer thickness, its deformation modulus, distribution of transverse and longitudinal deformations in concrete layers. On the basis of the theory of composite bars, a method for strength calculation of such structures was proposed; it gives opportunity to evaluate more accurately the behaviour of interface zone and other factors affecting the joint action of the structures under the load.