AbstractWhen alkynes were treated with diphenyl diselenide under an atmosphere of nitric oxide and oxygen, nitroselenation of the carbon‐carbon triple bond proceeded with a high regioselectivity to give the corresponding 1‐nitro‐2‐phenylseleno alkenes. Similarly, the nitroselenation of alkynes proceeded by the reaction of the alkynes with nitrogen dioxide. The stirring of the 1,2‐bis(phenylseleno) alkenes under an atmosphere of nitric oxide and oxygen also gave the corresponding 1‐nitro‐2‐phenylseleno alkenes.
A simple and stereoselective synthesis of (Z)-1,2-bis-arylselanyl alkenes from alkynes using KF/Al2O3
作者:Renata G. Lara、Paloma C. Rosa、Liane K. Soares、Márcio S. Silva、Raquel G. Jacob、Gelson Perin
DOI:10.1016/j.tet.2012.08.055
日期:2012.12
The title compounds were synthesized by a one-pot reaction of diaryl diselenides with terminalalkynes avoiding the previous preparation of arylselanyl alkynes. The reactions were performed under mild conditions with a range of terminalalkynes using KF/Al2O3 and PEG-400 as solvent. The addition of diaryl diselenides to alkynes occurred stereoselectively to give exclusively (Z)-1,2-bis-arylselanyl
通过二芳基二硒化物与末端炔烃的一锅反应来合成标题化合物,从而避免了之前制备芳基硒基炔烃的情况。反应在温和条件下,使用KF / Al 2 O 3和PEG-400作为溶剂,在一定范围的末端炔烃下进行。立体选择性地将二芳基二硒化物加成至炔烃中,以良好的收率仅得到(Z)-1,2-双-芳基-杂戊基烯基烯烃。使用微波辐射将反应时间缩短至几分钟,并且KF / Al 2 O 3 / PEG-400系统可以重复使用一次,而无需事先进行类似活性的处理。
A highly selective photoinduced selenoperfluoroalkylation of terminal acetylenes by using a novel binary system of perfluoroalkyl iodide and diphenyl diselenide
作者:Kaname Tsuchii、Akiya Ogawa
DOI:10.1016/j.tetlet.2003.09.182
日期:2003.12
Upon irradiation through Pyrex with a xenon lamp (hν>300 nm), terminal acetylenes undergo highly selective selenoperfluoroalkylation with perfluoroalkyl iodide and diphenyldiselenide. In this reaction, perfluoroalkyl and phenylseleno groups are selectively introduced into the terminal and internal positions of acetylenes, respectively.
New arylselanylpyrazole-copper catalysts: Highly efficient catalytic system for C Se and C S coupling reactions
作者:Felipe Lange Coelho、Lucielle Codeim Dresch、Rafael Stieler、Leandra Franciscato Campo、Paulo Henrique Schneider
DOI:10.1016/j.catcom.2018.12.009
日期:2019.3
CSe and CS couplingreactions. The performance of these complexes for CSe reactions was investigated in chalcogenoacetylene synthesis. The reactions were carried out under mild and aerobic conditions and afforded selanylalkynes bearing a variety of electron-withdrawing and electron-donating groups. The performance of these catalysts for CS coupling was investigated through the reaction of aryl halides
An efficient synthesis of alkynyl selenides and tellurides from terminal acetylenes and diorganyl diselenides or ditellurides catalyzed by recyclable copper oxide nanopowder
作者:Marcelo Godoi、Eduardo W. Ricardo、Tiago E. Frizon、Manuela S.T. Rocha、Devender Singh、Márcio W. Paixão、Antonio Luiz Braga
DOI:10.1016/j.tet.2012.08.086
日期:2012.12
Herein, we report an efficient method for the synthesis of alkynyl selenides and tellurides from terminal alkynes and diorganyl diselenides or ditellurides using CuO nanopowder as a recyclable catalyst. This new methodology furnished the desired products in good to excellent yields. Furthermore, the catalyst was easily recovered and reused for further catalytic reactions without loss of activity.