Palladium-Catalyzed, <i>tert-</i>
Butyllithium-Mediated Dimerization of Aryl Halides and Its Application in the Atropselective Total Synthesis of Mastigophorene A
作者:Jeffrey Buter、Dorus Heijnen、Carlos Vila、Valentín Hornillos、Edwin Otten、Massimo Giannerini、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1002/anie.201510328
日期:2016.3.7
A palladium‐catalyzed direct synthesis of symmetricbiaryl compounds from aryl halides in the presence of tBuLi is described. In situ lithium–halogen exchange generates the corresponding aryl lithium reagent, which undergoes a homocouplingreaction with a second molecule of the aryl halide in the presence of the palladium catalyst (1 mol %). The reaction takes place at room temperature, is fast (1 h)
The first synthesis of optically pure (+)- and (−)-isokotanin A and the assignment of their absolute configuration
作者:Guo-Qiang Lin、Min Zhong
DOI:10.1016/0040-4039(96)00457-1
日期:1996.4
The first asymmetric synthesis of optically pure (+) and (−)-Isokotanin A is described. The key steps involve the asymmetric Ullmann coupling and selective demethylation. The absoluteconfiguration of the naturally occuring (+)-Isokotanin A is assigned as aR.
BIARYL DIPHOSPHINE LIGANDS, INTERMEDIATES OF THE SAME AND THEIR USE IN ASYMMETRIC CATALYSIS
申请人:Abdur-Rashid Kamaluddin
公开号:US20130184479A1
公开(公告)日:2013-07-18
The present disclosure relates to biaryl diphosphine ligands of the formula (B), processes for the production of the ligands and the use of the ligands in metal catalysts for asymmetric synthesis. The disclosure also relates to intermediates used for the production of the biaryl diphosphine ligand. (Formula (B))
作者:Toshifumi Dohi、Motoki Ito、Itsuki Itani、Nobutaka Yamaoka、Koji Morimoto、Hiromichi Fujioka、Yasuyuki Kita
DOI:10.1021/ol202632h
日期:2011.12.2
The intermolecular C-H cross-coupling between aromatic ethers has been achieved for the first time using perfluorinated hypervalent iodine(III) compounds as extreme single-electron-transfer (SET) oxidants. The demonstrations of this specific coupling could provide a direct route to valuable oxygenated mixed naphthalene-benzene biaryls 3 only, without formation of other biaryl-derived byproducts.