Various Heck couplings have been carried out using segmented flow conditions to accelerate the reactions. Aryl iodides and aryl bromides as well as anilines in diazonium-type Heck reactions have been used Successfully. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of Derivatives of Phenanthrene and Helicene by Improved Procedures of Photocyclization of Stilbenes
作者:Harish R. Talele、Monik J. Gohil、Ashutosh V. Bedekar
DOI:10.1246/bcsj.82.1182
日期:2009.9.15
An improved method has been developed for photocyclization of stilbene to construct phenanthrenes and benzo[c]phenanthrenes. This reaction is promoted by iodine while tetrahydrofuran is used as an ...
A new approach to the synthesis of asymmetrical cyclic compounds using a stilbene scaffold has been developed. The use of boron trifluoride diethyl etherate as the catalyst, both with and without paraformaldehyde, allows us to obtain new substituted dioxanes, oxanes, cyclic compounds or dimer. The analysis of products was run using experimental and theoretical methods.
Mechanochemical solid state single electron transfer from reduced organic hydrocarbon for catalytic aryl-halide bond activation
作者:Amit Biswas、Anup Bhunia、Swadhin K. Mandal
DOI:10.1039/d2sc06119h
日期:——
act as a super reductant in the solid state to activate strong bonds by solid-state single electron transfer (SSSET) under the influence of mechanical energy leading to a catalytic strategy based on the mechano-SSSET or mechanoredox process. Here, we investigate the solid-state synthesis of the super electron donor phenalenyl anion in a ball mill and its application as an active catalyst in strong bond
Oxidation cascade with oxone: cleavage of olefins to carboxylic acids
作者:Keshaba Nanda Parida、Jarugu Narasimha Moorthy
DOI:10.1016/j.tet.2014.01.042
日期:2014.4
A variety of olefins is shown to be cleaved oxidatively to the corresponding acids with oxone as the reagent. The simple methodology that works well for a range of alkenes, i.e., styrenes, nitrostyrenes, stilbenes, cinnamic acids, chalcones, etc., involves heating of the reactant with oxone in acetonitrile-water mixture (1:1, v/v) at reflux. The oxidation cascade involves initial dihydroxylation followed by oxidative cleavage and oxidation of the resultant aldehydes to acids. (c) 2014 Elsevier Ltd. All rights reserved.