Maleczka R E,Shi F,Holmes D,et al.C-Hactivation/borylation/oxidation:a one-pot unified route to meta-substituted phenols bearing ortho-/para-directing groups. Journal of the American Chemical Society . 2003R.E. Maleczka, Jr, F. Shi, D. Holmes and M.R. Smith III, C-H Activation/...
Xu J,Nareshkumar Jain,Zhihua Sui.Halogen–magnesium exchange of m-and p-iodo or bromo-arenes bearing ortho-directing groups through ate complexes. Tetrahedron Letters . 2004Halogen-magnesium exchange of m- and p-iodo orbromo-arenes bearing ortho-directing groups through atecomplexes. Jiayi Xu,et...
C−H Activation/Borylation/Oxidation: A One-Pot Unified Route To Meta-Substituted Phenols Bearing Ortho-/Para-Directing Groups Specificity of reductive dehalogenation of substituted ortho- chlorophenols by Desulfitobacterium dehalogenans JW/IU-DC1 [published ... ...
Yes indeed. Whatisup with the halogens, and how is it that they can be deactivating (i.e. slow down the reaction rate) andyetlead toortho-, para-products? 4. The Key To Understandingortho-, para-Directors Andmeta-Directors Is To Understand The Stability of The Carbocation ...
Fisher,Joan M. Caroon,,Jahangir,,S. Russell Stabler,,Scott Lundberg,,Joseph M. Muchowski.O-Methylarenehydroxamates as ortho-lithiation directing groups. Titanium (III)-mediated conversion of O-methyl hydroxamates to primary amides. Journal of Organic Chemistry . 1993...
The directing effect of a substituent attached to an aromatic ring is predicted from its ability to donate or accept electrons from the aromatic ring through resonance. There are two kinds of directing substituents: (1) ortho-and para-director and (2) meta-director. ...
substituents decorated at the para-position of the phenyl ring are well tolerated to deliver the borylated products in moderate to excellent yields (3b/3b’‒3g/3g’) with mono-/bis- ratios ranging from 58:42 to 66:34, including those with trifluoromethyl (3f), and boronate groups (3g)...
Starting materials with substituents either at the ortho-, meta-, or para- position of the hydroxyl group have been extensively evaluated, respectively. Generally, the electronic properties of substitution (either electron-donating or -withdrawing group) on the aromatic ring played a small role to ...
The curing temperature of the P/F resins in accordance with the invention is on the order of ≉140°-160° C., preferably 150° C. Para-toluene sulfonic acid, oxalic acid and citric acid catalyst all have softening points above the P/F resin softening point and below or equal to the...
In ozone-mediated nitration of toluene, anisole and chlorobenzene with nitrogen dioxide, the initial products have been found to be composed mainly of the meta-nitro derivatives, but the isomer distributions are rapidly replaced by the ortho-para isomers as the reaction proceeds, sugesting the opera...