1200697-76-2Relevant academic research and scientific papers
Synthesis and Functionalization of Allenes by Direct Pd-Catalyzed Organolithium Cross-Coupling
Casti?eira Reis, Marta,Feringa, Ben L.,Mateos-Gil, Jaime,Mondal, Anirban
supporting information, p. 7823 - 7829 (2020/03/24)
A palladium-catalyzed cross-coupling between in situ generated allenyl/propargyl-lithium species and aryl bromides to yield highly functionalized allenes is reported. The direct and selective formation of allenic products preventing the corresponding isomeric propargylic product is accomplished by the choice of SPhos or XPhos based Pd catalysts. The methodology avoids the prior transmetalation to other transition metals or reverse approaches that required prefunctionalization of substrates with leaving groups, resulting in a fast and efficient approach for the synthesis of tri- and tetrasubstituted allenes. Experimental and theoretical studies on the mechanism show catalyst control of selectivity in this allene formation.
Generation of allenic/propargylic zirconium complexes and subsequent cross-coupling reactions: A facile synthesis of multisubstituted allenes
Zhang, Hao,Fu, Xiaoping,Chen, Jingjin,Wang, Erjuan,Liu, Yuanhong,Li, Yuxue
supporting information; experimental part, p. 9351 - 9358 (2010/03/04)
(Chemical Equation Presented) The β-alkoxide elimination reaction of propargylic ether with Negishi reagent leads to allenes and/or alkynes after hydrolysis. The product distribution is highly dependent on the substitution pattern of starting propargylic
