Results 51 to 60 of about 262,165 (220)

The utilization of bridgehead intermediates in organic synthesis [PDF]

open access: yes, 1991
Bridgehead intermediates have only recently been employed in organic synthesis. This study was undertaken to further explore and broaden their usefulness.
Hansen, Jeffrey Alan
core   +2 more sources

Stereoselektivno slobodnoradikalsko fenilsulfenilovanje neaktiviranog δ-ugljenikovog atoma [PDF]

open access: yes, 2004
A stereoselective free radical introduction of a phenylthio group onto a nonactivated methyl group in the 8-position, adjacent to a prochiral carbon atom, was achieved by photolysis of (-)-menthyl benzenesulfenate in the presence of hexabutylditin and ...
Došen-Mićović, Ljiljana   +3 more
core   +1 more source

Radical C–C bond formation using sulfonium salts and light [PDF]

open access: yes, 2020
Sulfonium salts are playing an increasingly significant role in contemporary organic synthesis. In particular, the generation of radicals from sulfonium salts is a fundamental process in Nature and has been the subject of investigation for over 50 years.
Perry, Gregory   +2 more
core   +1 more source

Fluorination studies using difluoroiodotoluene [PDF]

open access: yes, 1999
This thesis is divided into three parts. The first part is an introduction to the fluorination chemistry of difluoroiodotoluene and consists of two reviews.
Greaney, Michael Francis
core  

Novel synthesized seleno-glycoconjugates as cosmeceutical ingredients: Antioxidant activity and in vitro skin permeation

open access: yesEuropean Journal of Medicinal Chemistry Reports
Following recent successful results in the search for innovative semi-synthetic cosmeceutical Se-glycoconjugates, the work reported herein explores the development and evaluation of second-generation selenosugar-linked hydroxycinnamic acids as new ...
Giovanna Cimmino   +9 more
doaj  

New Synthetic Route for the Preparation of 4-Phenylthio-4-butanolide Derivatives by the Use of the Pummerer Rearrangement

open access: yes, 1981
The Pummerer rearrangement reaction of 2- or 3-substituted 4-(phenylsulfinyl) butyric acids in the presence of an excess amount of acetic anhydride and a catalytic amount of p-toluenesulfonic acid in refluxing toluene for 1 h afforded 2- or 3-substituted
Mikio Watanabe   +4 more
semanticscholar   +1 more source

Skeletal Rearrangements of 9-Thiabicyclononanes and Related Syntheses [PDF]

open access: yes, 1976
This thesis descibes two related areas of chemical investigation. In the first section pyrolytic and base-induced eliminations of 2,6-disubstituted 9-thiabicyclo[3.3.1] nonanes and 2-substituted 9-thiabicyclo [3.3.1]non-6-enes are found to occur with ...
Livingston, Catherine Mary
core  

Synthèse et relations structure-activité cytotoxique et antibactérienne des dirchromones [PDF]

open access: yes, 2021
L’exploration de l’espace chimique biologiquement pertinent requiert l’utilisation de règles ou de sources d’inspiration permettant de circonscrire les recherches au sein de l’immensité des assemblages possibles des atomes de carbone.
St-Gelais, Alexis
core  

Studies On 2,3-Unsaturated Sugars : Reactivity Switching, Rearrangements And Conjugate Additions [PDF]

open access: yes, 2012
Unsaturated sugars constitute as an important category of carbohydrate precursors in synthesis. Specifically, 1,2- and 2,3-unsaturated glycosides are excellent intermediates to derivatize monosaccharides and as building blocks in organic synthesis.
Mukherjee, Arunima
core  

Part A: Palladium(II)-Catalyzed Enantioselective Saucy-Marbet Claisen Rearrangement of Propargyloxy indoles to Quaternary Oxindoles and Spirocyclic Lactones. Part B: The Regioselective Oxidative Coupling of Phenols . [PDF]

open access: yes, 2013
Part A. The first catalytic, enantioselective Saucy-Marbet Claisen rearrangement has been developed. Palladium(II) catalysts with BINAP or t-BuPHOX ligands were discovered as superior in catalyzing Claisen rearrangements of proparyloxy-substituted ...
Cao, Trung Duy Chi
core   +1 more source

Home - About - Disclaimer - Privacy