Grunwald−Winstein Relations in the Solvolyses of Highly Congested Simple Secondary and Tertiary Alkyl Systems. Evidence for the Brønsted Base-Type Solvation in the Standard 1- and 2-Adamantyl Systems
crowded tertiary alkyl chlorides having a neopentyl or a (1-adamantyl)methyl substituent on the reaction center were subjected to solvolysis rate studies, and the Grunwald–Winstein (GW) type relationship with respect to the YCl scale was examined. Analyses of the plots showed that these bulky substituents efficiently preclude the nucleophilic solvent participation from the rear side and that the data points
structures and acidities. The influence of different ionicliquids, ionicliquid loading, different co-catalysts, catalyst ratios (mole ratio of ionicliquid to co-catalyst), reaction time, pressure, temperature, solvent, source of reactants, and the recycling of catalyst systems was studied. Among the synthesized ionicliquids, 1-(4-sulfonic acid)butyl-3-hexylimidazolium hydrogen sulfate ([HIMBs]HSO4) exhibited
PROCESS FOR PREPARING KETONES BY REACTING 1,1-DISUBSTITUTED OLEFINS WITH N2O
申请人:Teles Joaquim Henrique
公开号:US20110269996A1
公开(公告)日:2011-11-03
The present invention relates to a process for preparing a ketone, comprising the reaction of a composition (I) at least comprising a 1,1-disubstituted olefin, with a composition comprising dinitrogen monoxide, wherein the reaction is effected in the presence of a solvent which comprises at least one proton-donating functional group.
A novel mixture containing a number of particular mercaptans, a process for preparing it and its use as advantageous molecular weight regulator in the production of synthetic rubbers are provided.