One-pot synthesis of sulfonyl (E)-stilbenes by nitrobenzene-mediated dimerizative desulfonation of benzylic sulfones
摘要:
A facile one-pot synthetic route for preparing sulfonyl (E)-stilbenes 4 is developed. The efficient route is realized by a nitrobenzene (PhNO2)-mediated dimerizative desulfonation of benzylic sulfones 3 in the presence of sodium hydride (NaH) in good yields. Some synthetic investigations of sulfonyl stilbenes 4 are also examined. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of sulfone derivatives via palladium-catalyzed cross-coupling of benzyl trimethylammonium triflates and sulfonyl hydrazides
作者:Juelin Wan、Weijie Yu、Tao Wang、Jin Luo
DOI:10.1080/10426507.2021.2016758
日期:2022.7.3
Abstract A palladium-catalyzedcross-coupling of benzyl trimethylammonium triflates and sulfonyl hydrazides for the synthesis of various benzyl sulfones is reported. This novel protocol shows widespread functional group tolerance, leading to the desired sulfones in moderate to excellent yields.
N-(α-Aminoalkyl)benzotriazoles, prepared from a variety of aldehydes and secondary amines, react with diverse ester enolates, sulfones, a sulfoxide, alkylated pyridines, and nitriles to provide novel access to β-amino carboxylic esters (55-80% yield), β-aminoalkyl sulfones (42-88% yield), β-aminoalkyl sulfoxides (20-32% yield), α- and γ-(β-aminoalkyl)pyridines (69-90% yield), and β-aminoalkyl cyanides (10-97% yield), respectively.
Stereoselective Control by Face-to-Face Versus Edge-to-Face Aromatic Interactions: The Case of<i>C</i><sub>3</sub>-Ti<sup>IV</sup>Amino Trialkolate Sulfoxidation Catalysts
作者:Gabriella Santoni、Miriam Mba、Marcella Bonchio、Williamâ A. Nugent、Cristiano Zonta、Giulia Licini
DOI:10.1002/chem.200902072
日期:2010.1.11
The stereoselective oxidation of differently functionalised benzyl phenylsulfides has been examined by using enantiopure TiIV trialkanolamine complexes. These complexes efficiently catalyse the sulfoxidation with good stereoselectivities. The data highlight the contribution to the stereoselectivity of steric effects and non‐covalent π–π interactions between the aromatic rings of the TiIV complex and
Synthesis of diarylcyclopropyl spirocyclic ketones
作者:Meng-Yang Chang、Chieh-Kai Chan、Yi-Chia Chen
DOI:10.1016/j.tet.2014.02.056
日期:2014.4
A facile one-pot synthetic route for preparing a series of functionalized diarylcyclopropyl spirocyclic ketones 4 is developed. The efficient cyclopropanation route of the conjugated cyclic ketones 2 with sulfones 1 in the presence of NaH shows interesting molecular diversities. The reaction mechanism of the stereocontrolled cyclopropanations has been discussed. (C) 2014 Elsevier Ltd. All rights reserved.
Palladium-catalyzed benzylic direct arylation of benzyl sulfones with aryl halides
作者:Takashi Niwa、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1016/j.tet.2009.01.030
日期:2009.3
An effective palladium catalyst system for the direct arylation of benzyl sulfones with aryl halides has been developed. The catalytic reaction provides a facile route to diarylmethyl sulfones. The products can be transformed further via desulfonylative functionalization mediated by aluminum compounds. (C) 2009 Elsevier Ltd. All rights reserved.