16789-51-8Relevant articles and documents
Direct cyclopropanation of 1-alkynylphosphonates by Cp2ZrCl 2/2EtMgBr/2AlCl3 to afford cyclopropylmethylphosphonates
Quntar, Abed Al Aziz,Srebnik, Morris
, p. 730 - 733 (2006)
The reagent system Cp2ZrCl2/2EtMgBr/2AlCl3 converts 1-alkynylphosphonates into cyclopropylmethylphosphonates 3 in good isolated yields. Ethers, chlorides, and other cyclopropyl groups are compatible with the reaction condi
Ruthenium(II)-catalyzed olefination: Via carbonyl reductive cross-coupling
Wei, Wei,Dai, Xi-Jie,Wang, Haining,Li, Chenchen,Yang, Xiaobo,Li, Chao-Jun
, p. 8193 - 8197 (2017/11/27)
Natural availability of carbonyl groups offers reductive carbonyl coupling tremendous synthetic potential for efficient olefin synthesis, yet the catalytic carbonyl cross-coupling remains largely elusive. We report herein such a reaction, mediated by hydrazine under ruthenium(ii) catalysis. This method enables facile and selective cross-couplings of two unsymmetrical carbonyl compounds in either an intermolecular or intramolecular fashion. Moreover, this chemistry accommodates a variety of substrates, proceeds under mild reaction conditions with good functional group tolerance, and generates stoichiometric benign byproducts. Importantly, the coexistence of KOtBu and bidentate phosphine dmpe is vital to this transformation.
Pair-Selective Coupling of Alkynes with Alkenes on Zirconocene Complex
Takahashi, Tamotsu,Xi, Zhenfeng,Rousset, Christophe J.,Suzuki, Noriyuki
, p. 1001 - 1004 (2007/10/02)
When ethylene and alkynes such as 4-octyne and diphenylacetylene were treated with Cp2ZrBu2, highly pair selective coupling products were formed in high yields.Similarly, styrene or trimethylvinylsilane also afforded cross coupling products with alkynes on zirconocene complex.
