Zobrazeno 1 - 10
of 258
pro vyhledávání: '"K. UNEYAMA"'
Autor:
K. Uneyama, M. Kobayashi
Publikováno v:
ChemInform. 23
Publikováno v:
Chemical communications (Cambridge, England). (20)
Intramolecular electrostatic repulsions between the local negative charge on a trifluoromethyl group and that on the ortho position of an aryl moiety of a nucleophile was found to be a controlling factor of the diastereoselectivity in a cyclopropanat
Publikováno v:
Synfacts. 2008:1034-1034
Publikováno v:
Synfacts. 2008:0466-0466
Publikováno v:
ChemInform. 21
Publikováno v:
Tetrahedron. 24:5293-5309
New σ* values of some α-mercapto and α-alkoxy groups have been obtained from the kinetic measurements of acidic and alkaline hydrolyses of ethyl α-substituted carboxylates. The acid dissociation constants and UV spectra of these carboxylic acids
Publikováno v:
Tetrahedron. 24:5283-5291
Several α-mercaptoacetic and related acids were synthesized and the rates of the amine-catalysed decarboxylation were measured. In the carbanion-forming reaction, the α-mercapto group exhibits a dramatic rate-enhancement, due to the 3d-orbital reso
Publikováno v:
Electrochimica Acta. 12:137-146
Anodic reactions of three kinds of alkylbenzene, toluene, ethylbenzene and cumene, in methanolic solution are described. Voltammetric measurements showed that alkylbenzenes examined here do not participate in the charge- transfer reaction so that the
Publikováno v:
Tetrahedron. 24:5271-5281
The kinetics of the base-catalysed decarboxylation of a few α-mercaptoacetic acids and other related acids in DMSO using a large excess of triethanolamine has been investigated. The apparent first order rate constant increases gradually as the react
Publikováno v:
Electrochimica Acta. 11:891-894
The product distribution of the Kolbe electrolysis, which varies with the kind of carboxylic acid electrolysed, has been considered from the thermochemical standpoint. Approximating the bond dissociation energy of the carboxylic hydrogen, D(RCOOM,