Palladium-Catalyzed Copper-Promoted Hiyama-Type Carbon–Carbon Cross-Coupling Reactions of Dihetaryl Disulfides as Electrophiles
作者:Zheng-Jun Quan、Xi-Cun Wang、Ming-Xia Liu、Hai-Peng Gong
DOI:10.1055/s-0036-1589116
日期:2018.2
Dihetaryl disulfides were used as electrophiles in a palladium-catalyzed carbon–carbon cross-coupling reaction with arylsilanes to realize a Hiyama-type reaction. This unique transformation shows high reactivity, excellent functional-group tolerance, and mild reaction conditions, making it an attractive alternative to conventional cross-coupling approaches for carbon−carbon bond construction.
Untersuchungen an 1,3-Dicarbonyl-Verbindungen, 18. Mitt. 2,4-Diaryl-6-methyl-1,2,3,4-tetrahydropyrimidin-5-carbon-säureester
作者:Klaus Görlitzer、Dietrich Buß
DOI:10.1002/ardp.19813141109
日期:——
Bei der Hantzsch‐Synthese werden neben den 1,4‐Dihydropyridinen 1 die diastereomeren 1,2,3,4‐Tetrahydropyrimidine 2und 3 erhalten. Die Titelverbindungen werden zu den Pyrimidinen 7 oxidiert. Photolyse von 1d liefert das Dimer 10. 2c, 2d und 3c, 3d werden photochemisch zu den Bisnitrosophenylpyrimidinen 11 umgesetzt. Unter reduktiven Bedingungen werden aus 3c die Abbauprodukte 12 und 13 isoliert.
Nickel-Catalyzed Cross-Electrophile Coupling of Aryl Bromides with Pyrimidin-2-yl Tosylates
作者:Chunyu Gong、Congde Huo、Xicun Wang、Zhengjun Quan
DOI:10.1002/cjoc.201700071
日期:2017.9
A new protocol for the NiCl2‐catalyzedcross‐electrophile coupling of arylbromides with pyrimidin‐2‐yl tosylates to give the corresponding C2‐arylation pyrimidine derivatives has been developed. This study provides an improvement over previous methods by using pyrimidin‐2‐yl tosylates instead of halides as coupling partners that are stable and easily available.
Chemoselective Carbon-Carbon Cross-Coupling<i>via</i>Palladium-Catalyzed Copper-Mediated CS Cleavage of Disulfides
作者:Zheng-Jun Quan、Ying Lv、Fu-Qiang Jing、Xiao-Dong Jia、Cong-De Huo、Xi-Cun Wang
DOI:10.1002/adsc.201300776
日期:2014.2.10
AbstractAn efficient method for carbon‐carbon bond formation is described. The process employs the palladium‐catalyzed copper‐mediated cross‐coupling of diheteroaryl disulfides with arylboronic acids or alkynes to deliver CC coupling products through unreactive CS bond cleavage. The scope of the coupling reactions, including both the disulfides and arylboronic acids or alkynes, are documented.magnified image
RETRACTED: Reusable biomacromolecule-Pd complex catalyzed C–C cross-coupling reactions via C–S cleavage of disulfides
作者:Quanlu Yang、Shang Wu、Zhengjun Quan、Baoxin Du、Mingming Wang、Peidong Li、Yinpan Zhang、Ziqiang Lei、Xicun Wang