Synthesis of hydroquinone-, biphenol-, and binaphthol-containing aza macroheterocycles via regioselective hydroformylation and reductive amination
作者:Goran Angelovski、Peter Eilbracht
DOI:10.1016/j.tet.2003.08.012
日期:2003.10
Rhodium(I) catalyzed regioselective hydroformylation of diolefins and subsequent reductive amination of the dialdehydes in the presence of α,ω-diamines is applied to azamacroheterocyclic ring synthesis. Starting from aromatic diallyl ethers of hydroquinone, biphenol and binaphthol 20–28 membered macroheterocycles were obtained in up to 78% yield.
A resin for an information recording medium comprising a polymer characterized by having a crosslinked structure and a process for producing such a resin by charging a mold with a monomer component which comprises a monomer having at least two polymerizable double bonds and/or the prepolymer of the monomer and polymerizing the monomer component in the mold.
Copper-Catalyzed Regio- and Stereoselective Intermolecular Three-Component Oxyarylation of Allenes
作者:Taisuke Itoh、Yohei Shimizu、Motomu Kanai
DOI:10.1021/ol501022d
日期:2014.5.16
A copper(II)-catalyzed intermolecular three-component oxyarylation of allenes using arylboronic acids as a carbon source and TEMPO as an oxygen source is described. The reaction proceeded under mild conditions with high regio- and stereo-selectivity and functional group tolerance. A plausible reaction mechanism is proposed, involving carbocupration of allenes, homolysis of the intervening allylcopper(II), and a radical TEMPO trap.
Biphenol-Based Phosphoramidite Ligands for the Enantioselective Copper-Catalyzed Conjugate Addition of Diethylzinc
作者:Alexandre Alexakis、Damien Polet、Stéphane Rosset、Sébastien March
DOI:10.1021/jo049359m
日期:2004.8.1
Phosphoramidite ligands, based on ortho-substituted biphenols and a chiral amine, induce high enantioselectivities (ee's up to 99%) in the copper-catalyzed conjugateaddition of dialkylzinc reagents to a variety of Michael acceptors. Particularly, the best reported ee's were obtained for acyclic nitroolefins.