Copper-catalyzed C–Se coupling of diphenyl diselenide with arylboronic acids at room temperature
作者:Bo Zheng、Ying Gong、Hua-Jian Xu
DOI:10.1016/j.tet.2013.04.124
日期:2013.7
An efficient synthetic protocol for the Cu-catalyzed cross-coupling of diphenyl diselenide and arylboronic acid at room temperature was described. This catalytic system could tolerate a variety of arylboronic acids with only 3 mol % amount of CuSO4 as the catalyst and inexpensive 1,10-phen. H2O as the ligand. Moreover, this catalytic system used environment-friendly EtOH as the solvent and catalytic amount of Na2CO3 (20 mol %) as the base in the air. (C) 2013 Elsevier Ltd. All rights reserved.
An Asymmetric, Catalytic (4 + 3) Cycloaddition Reaction of Cyclopentenyl Oxyallylic Cations
作者:Michael Topinka、Kerstin Zawatzky、Charles L. Barnes、Christopher J. Welch、Michael Harmata
DOI:10.1021/acs.orglett.7b01868
日期:2017.8.4
Treatment of 2-tosyloxycyclopentanone with substituted furans in the presence of a chiral amino alcohol catalyst and K2HPO4 results in the formation of (4 + 3) cycloaddition products with enantioselectivities that exceed 90% in certain cases.
Al<sub>2</sub>O<sub>3</sub>-Supported Cu-Catalyzed Electrophilic Substitution by PhSeBr in Organoboranes, Organosilanes, and Organostannanes. A Protocol for the Synthesis of Unsymmetrical Diaryl and Alkyl Aryl Selenides
作者:Sukalyan Bhadra、Amit Saha、Brindaban C. Ranu
DOI:10.1021/jo100755g
日期:2010.7.16
Alumina-supported copper sulfate efficiently catalyzes electrophilic substitution in organoborane, organosilanes, and organostannanes by phenylselenium bromide providing a novel and efficient route to the synthesis of unsymmetrical diaryl and alkyl aryl selenides. A series of aryl, alkyl, and heteroaryl phenyl selenides were obtained in high yields. The catalyst is inexpensive, eco- and user-friendly