An epoxide ring- opening reaction via hypervalent silicate intermediate: Synthesis of statine. Synthesis 2161-2164 (2003).Konno H,Toshiro E,Hinoda N.An epxide ring-opening reaction via a hypervalent silicate intermediate: synthesis of statine.Synthesis. 2003...
1) epoxide ring-opening 环氧开环 2) epoxy resin 环氧 1. Effect of Polyether on Preparation of Epoxy Resin-PU IPN; 聚醚对环氧-聚氨酯互穿网络制备的影响 2. The title oil resistant coatings for fuel tanks has been developed by choosing proper polyester resin,epoxy resinand appropriate polyisocan...
In thelast postwe discussed the reactions of epoxides under acidic conditions and saw how they resembled the “3-membered ring” family of alkene mechanisms. We left off by noting that the reaction of the epoxide (shown above) with NaOH in H2O gave a different product than that obtained thro...
The ring-opening reactions of epoxides and their mechanism depend on the conditions of the process. In the presence of an acid, the oxygen atom in the epoxide ring is protonated; the extra proton changes the distribution of the negative charge at the oxygen atom and increases the electrophilicit...
In the context of synthetic efforts targeting the alkaloid lyconadin A, scalemic epoxide 25 was prepared by a highly stereoselective sequence involving a Myers alkylation and a Shi epoxidation. Ring-opening of this epoxide with a vinylcopper complex afforded alcohol 26 instead of the expected ...
The concept of epoxy and phthalic anhydride ring-opening reactions in the presence of nucleophilic alcohol, and possible oligomerization of components.Adapted from [108]. In the presence of a nucleophile, the epoxide groups can produce hydroxylated fatty acid ethers (reaction A), while an anhydride...
Catalytic enantioselective meso-epoxide ring opening reaction with phenolic oxygen nucleophile promoted by gallium heterobimetallic multifunctional complexes. Matsunaga, S,Das, J,Roels, J,Vogl, E. M,Yamamoto, N,Iida, T,Yamaguchi, K,Shibasaki, M. Journal of the American Chemical Society . 2000...
EPOXIDE RING OPENING PROCESSIn a process for opening the ring of epoxide compounds with nucleophiles, the reaction is carried out in the presence of fluorinated alkane-sulphonic acids, in particular trifluoromethane-sulphonic acid, that act as catalysts....
Epoxide Ring Opening by α-Sulfonyl Carbanions. Synthesis of γ-Hydroxy Sulfones and Triflonessulfoxides, sulfones, sulfenes and derivatives (benzene compounds-Hydroxy sulfones and triflones are obtained in moderate to excellent yields when n-butyl lithium is added to a mixture of sulfone and ...
This was attributed to the lower bond directionality of Mg, possibly resulting in increased degrees of freedom during epoxide coordination. 26 was therefore proposed to catalyse ROCOP via a chain-shuttling mechanism (Fig. 6) with CHO coordination to Mg, followed by ring-opening via the Co-...