Thermodynamic, spectroscopic, and density functional theory studies of allyl aryl and prop-1-enyl aryl ethers. Part 1. Thermodynamic data of isomerization
Oxidation of olefins by palladium(II). 18. Effect of reaction conditions, substrate structure and chiral ligand on the bimetallic palladium(II) catalyzed asymmetric chlorohydrin synthesis
作者:Arab K El-Qisairi、Hanan A Qaseer、Patrick M Henry
DOI:10.1016/s0022-328x(02)01580-2
日期:2002.8
The effect of electronic factors, solvent composition, identity of the chiral bidentate, and olefinstructure on the yields and enantioselectivities of the asymmetric chlorohydrin synthesis were investigated. Electronic effects on the chlorohydrin reaction were tested by oxidation of phenyl allyl ether p-substituted by H, Cl, CH3O and CN. All species gave same similar yields and enantioselectivities
Reinvestigation of a Catalytic, Enantioselective Alkene Dibromination and Chlorohydroxylation
作者:Scott E. Denmark、Nessa Carson
DOI:10.1021/acs.orglett.5b02650
日期:2015.12.4
reactions from oft-cited literature studies are described. The reactions were performed with full fidelity to the original report wherever possible. Analysis of the enantiomeric composition was performed by chiral stationary phase HPLC or SFC (CSP-HPLC or CSP-SFC), as opposed to the original report, which usedchiralshiftreagentNMR spectroscopy. After careful study, the reported levels of enantioselectivity
UDCaT‐5: A Novel and Efficient Solid Superacid Catalyst for Claisen Rearrangement of Substituted Allyl Phenyl Ethers
作者:Ganapati D. Yadav、Sharad V. Lande
DOI:10.1080/00397910601163810
日期:2007.3.1
Abstract The Claisen rearrangement of allyl phenyl ethers is a fundamental reaction in organic synthesis with a variety of applications in perfumes, flavors, pharmaceuticals, agrochemicals, polymers, fine chemicals, and intermediate industries. The development of environmentally benign processes using solid acid catalysts is becoming an area of growing interest. It was accomplished in an efficient
New Palladium(II)-Catalyzed Asymmetric 1,2-Dibromo Synthesis
作者:Arab K. El-Qisairi、Hanan A. Qaseer、George Katsigras、Philip Lorenzi、Unnati Trivedi、Sylvia Tracz、Amy Hartman、Jason A. Miller、Patrick M. Henry
DOI:10.1021/ol0273093
日期:2003.2.1
[reaction: see text] The oxidation of olefins by chiral monometallic and bimetallic Pd(II)-Cu(II) catalysts in bromide-containing aqueous-THF reaction mixtures produced chiral 1,2-dibromides. With alpha-olefins, the ee's were about 95% while most of the internal alkenes gave somewhat lower enantioselectivities ( approximately 80%).
Iron-Catalyzed <i>Ortho</i>-Allylation of Aromatic Carboxamides with Allyl Ethers
作者:Sobi Asako、Laurean Ilies、Eiichi Nakamura
DOI:10.1021/ja4106368
日期:2013.11.27
possessing an N-(quinolin-8-yl)amide directing group are ortho-allylated with allylphenylether in the presence of an iron/diphosphine catalyst and an organometallic base at 50-70 °C. The reaction proceeds via fast iron-catalyzed C-H activation, followed by reaction of the resulting iron intermediate with the allylether in γ-selective fashion.