Substituent effects on the aliphatic Claisen rearrangements. 2. Theoretical analysis

1981 ◽  
Vol 103 (23) ◽  
pp. 6984-6986 ◽  
Author(s):  
Cynthia Burrows ◽  
Barry K. Carpenter
Keyword(s):  
Theoretical Analysis ◽  
Substituent Effects ◽  
Claisen Rearrangements

Claisen rearrangements of benzyl vinyl ethers: theoretical investigation of mechanism, substituent effects, and regioselectivity

2017 ◽  
Vol 15 (37) ◽  
pp. 7887-7893 ◽  
Author(s):  
Elizabeth H. Krenske ◽  
Jed M. Burns ◽  
Ross P. McGeary
Keyword(s):  
Theoretical Investigation ◽  
Theoretical Calculations ◽  
Substituent Effects ◽  
Vinyl Ethers ◽  
Claisen Rearrangements

Theoretical calculations are reported which examine the mechanisms of Claisen rearrangements of benzyl vinyl ethers and the ways in which substituents influence reactivity and regioselectivity.

Cesium Fluoride-mediated Claisen Rearrangements of Phenyl Propargyl Ethers: Substituent Effects of an ortho-Alkoxy Group on the Benzene Ring or Modified Propargyl Residues

Heterocycles ◽  
1997 ◽  
Vol 45 (11) ◽  
pp. 2261 ◽  
Author(s):  
Tsutomu Ishikawa ◽  
Akiko Mizutani ◽  
Chizue Miwa ◽  
Yumie Oku ◽  
Naoko Komano (nee Ohkubo) ◽  
...  
Keyword(s):  
Benzene Ring ◽  
Substituent Effects ◽  
Alkoxy Group ◽  
Claisen Rearrangements ◽  
Cesium Fluoride

scholarly journals Theoretical analysis of [5.5.6]cyclacenes: electronic properties, strain energies and substituent effects

2015 ◽  
Vol 17 (11) ◽  
pp. 7366-7372 ◽  
Author(s):  
Birgit Esser
Keyword(s):  
Theoretical Analysis ◽  
Band Gap ◽  
Electronic Properties ◽  
Substituent Effects ◽  
Ground States ◽  
Closed Shell ◽  
Band Gaps ◽  
Low Band Gap ◽  
Effect Of Substituents ◽  
Electronic Ground

[5.5.6]nCyclacenes are proposed as low band gap, closed-shell materials and theoretically investigated regarding their structures, strain energies, aromaticity, electronic ground states, band gaps, and the effect of substituents.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

Theoretical analysis of a monopole antenna with conducting flat disk above the earth

2001 ◽  
Vol 84 (7) ◽  
pp. 27-36
Author(s):  
Aki Yuasa ◽  
Daisuke Itatsu ◽  
Naoki Inagaki ◽  
Nobuyoshi Kikuma
Keyword(s):  
Theoretical Analysis ◽  
Monopole Antenna ◽  
The Earth ◽  
Flat Disk

Context Aversion, Pavlovian Conditioning, and the Psychological Side Effects of Chemotherapy

1997 ◽  
Vol 2 (2) ◽  
pp. 118-124
Author(s):  
Geoffrey Hall
Keyword(s):  
Animal Model ◽  
Side Effects ◽  
Theoretical Analysis ◽  
Conditioned Response ◽  
Behavioral Strategies ◽  
Contextual Cues ◽  
Anticipatory Nausea ◽  
Laboratory Rats ◽  
Anticipatory Nausea And Vomiting ◽  
Parallel Case

Patients who have undergone several sessions of chemotherapy for cancer will sometimes develop anticipatory nausea and vomiting (ANV), these unpleasant side effects occurring as the patients return to the clinic for a further session of treatment. Pavlov's analysis of learning allows that previously neutral cues, such as those that characterize a given place or context, can become associated with events that occur in that context. ANV could thus constitute an example of a conditioned response elicited by the contextual cues of the clinic. In order to investigate this proposal we have begun an experimental analysis of a parallel case in which laboratory rats are given a nausea-inducing treatment in a novel context. We have developed a robust procedure for assessing the acquisition of context aversion in rats given such training, a procedure that shows promise as a possible animal model of ANV. Theoretical analysis of the conditioning processes involved in the formation of context aversions in animals suggests possible behavioral strategies that might be used in the alleviation of ANV, and we report a preliminary experimental test of one of these.

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