Hydrolytic and Aminolytic Kinetic Resolution of Terminal Bis-Epoxides
摘要:
Hydrolytic and aminolytic kinetic resolution of terminal bis-epoxides catalyzed by (salen)Co-III complexes affords epoxy-diols and N-protected epoxy-amino alcohols with excellent enantio- and diastereoselectivity and good yields. An operationally simple procedure gives instant access to valuable building blocks containing two remote stereocenters in highly enantioenriched form.
CYCLIC CARBONATE MONOMERS AND POLYMERS PREPARED THEREFROM
申请人:Marks Maurice J.
公开号:US20140191156A1
公开(公告)日:2014-07-10
A cyclic carbonate monomer including the reaction product of (a) a divinylarene dioxide, and (b) carbon dioxide; a process for making the cyclic carbonate monomer; and a polymer such as a poly(hydroxyurethane) composition made therefrom. The poly(hydroxyurethane) composition made from the above cyclic carbonate monomer forms a reactive intermediate that can be used for making, for example, a poly(hydroxyurethane) foam product.
Effect of Anions on the Epoxidation of Styrenes with H<sub>2</sub>O<sub>2</sub>in the Presence of Ammonium Heptamolybdate(VI)– Dioctyltin Oxide Catalysts
The epoxidation of styrene, α-methylstyrene, β-methylstyrene, p-chlorostyrene, and m-divinylbenzene with H2O2 in the presence of ammonium heptamolybdate(VI)–dioctyltin oxide catalysts in CHCl3–H2O was studied. The addition of neutral salts, such as NaNO3 or Na2SO4, to the catalyst system prevented the successive hydration of styrene oxide once formed. The presence of KCl or NaCl almost suppressed the oxidation, while no substantial effect was observed in NaClO4. The various effects of these anions were related to the results concerning the coordination of anions to Mo(VI)-ions.
Disclosed is a two-step process to make a dialdehyde. In the process a diepoxide is first hydrolyzed with an alcohol solvent to an intermediate which is then subjected to a double-Pinacol rearrangement to obtain a dialdehyde. The dialdehydes have utility as chemical intermediates, and particular utility in processes to make enol ether compounds which can be used in applications as plasticizers, diluents, wetting agents, coalescing aids and as intermediates in chemical processes.
Process to make aromatic enol ethers and olefin isomers of aromatic enol ethers
申请人:Eastman Chemical Company
公开号:US10865171B1
公开(公告)日:2020-12-15
Disclosed is a method for making aromatic enol ethers that have utility as film-hardening additives for coating formulations. The aromatic enol ethers have particular utility as film-hardening additives for water-based coating formulations. The aromatic enol ethers provide improvements in hardness and hardness related properties such as block resistance without contributing to the volatile organic content of the composition.
[EN] PROCESS FOR PREPARING A DIVINYLARENE DIOXIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN DIOXYDE DE DIVINYLARÈNE
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2013070392A1
公开(公告)日:2013-05-16
A process for preparing a divinylarene dioxide including reacting (a) at least one divinylarene, (b) hydrogen peroxide, (c) at least one iron-containing catalyst, and (d) an excess of amine hydrogen halide, under conditions to form a divinylarene dioxide.