92013-67-7Relevant academic research and scientific papers
Transition-Metal-Free Sulfuration/Annulation of Alkenes: Economical Access to Thiophenes Enabled by the Cleavage of Multiple C-H Bonds
Chen, Liang,Min, Hao,Zeng, Weilan,Zhu, Xiaoming,Liang, Yun,Deng, Guobo,Yang, Yuan
, p. 7392 - 7395 (2019/01/03)
A novel, atom economical, and transition-metal-free strategy for the synthesis of thiophenes from substituted buta-1-enes with potassium sulfide has been presented. The reaction achieves double C-S bond formations via cleavage of multiple C-H bonds and provides an efficient approach to access various functionalized thiophenes. Moreover, the strategy can also be used for the synthesis of thiophenes from 1,4-diaryl-1,3-dienes. Mechanistically, DMSO plays a role of oxidant and S3?- in situ generated from K2S is involved.
Synthesis and transformations of metallacycles 38.* the Cp 2ZrCl2-catalyzed cyclometallation of α,α- diynes upon the action of RMgR' or RnAlCl3-n
D'Yakonov,Tuktarova,Dzhemilev
experimental part, p. 1633 - 1639 (2012/09/05)
The Cp2ZrCl2-catalyzed cyclometallation of a,(a-alkadiynes upon the action of RMgR' or RnAlCl3-n was accomplished to yield unsaturated di- and tricyclic (magnesa)aluminacarbocycles in up to 85% yield.
A zirconocene-coupling route to substituted poly(p- phenylenedienylene)s: Band Gap tuning via conformational control
Lucht, Brett L.,Mao, Shane S. H.,Tilley, T. Don
, p. 4354 - 4365 (2007/10/03)
A series of substituted poly(p-phenylenediyne)s (1a-f) was synthesized by the palladium-catalyzed cross-coupling condensation of terminal dialkynylalkanes with substituted diiodobenzenes. Polymerizations were conducted with 1,4-diiodo-5-hexoxy-2-methoxybe
Convenient preparative method of α,β-disubstituted cyclopentenone by zirconium promoted intermolecular coupling of an alkyne, EtMgBr (or ethylene) and CO
Takahashi, Tamotsu,Xi, Zhenfeng,Nishihara, Yasushi,Huo, Shouquan,Kasai, Kayoko,Aoyagi, Koichiro,Denisov, Victor,Negishi, Ei-Ichi
, p. 9123 - 9134 (2007/10/03)
Treatment of Cp2ZrCl2 with 2 equiv of EtMgBr in THF, followed by addition of an internal alkyne and subsequent treatment with CO/I2 gave α,β-disubstituted cyclopentenone in good to high yields. When a conjugated enyne was used as an
