Nanoclay-Mediated Epoxidation of HTPB Using In-Situ-Generated Dimethyl Dioxirane
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چکیده
منابع مشابه
Design and Synthesis of Binaphthol-Derived Chiral Ketone Catalysts for Dioxirane-Mediated Asymmetric Epoxidation of Olefins
Binaphthol-derived chiral ketones 1a-c were synthesized and were shown to serve as active catalysts for asymmetric epoxidation of olefins using Oxone®, although their enantioselectivities were not high. However, very interestingly, the stereochemical outcome of the resulting epoxides implicates that in the epoxidation using 1ac, the planar transition state may be more favorable than the spiro t...
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A study, via isotopic labeling, of the stereoselective processes in a Shi-type epoxidation, has revealed that the chiral platform provided by the catalyst mediates the transfer of the pro-S "O" of the related dioxirane species to the alkene in a doubly stereoselective manner.
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In the past 15 years considerable progress has been made in the field of homogeneous catalyzed epoxidations of unfunctionalized olefins. Epoxidation is an important methodology for preparation of highly functionalized organic compounds; optically active epoxides especially are important intermediates. From many olefins it is now possible to create in only one step optically active epoxides in n...
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Gaseous dimethyl dioxirane (DMDO) was evaluated as a decontaminant for simulants of chemical and biological warfare agents (CBW). Isolated DMDO was present as a liquid in CFC 113 or the fluorinated ether, Novec HFE 7100TM (3M) and was easily vaporized under reduced pressure. The Hagent simulant, thioanisole, and the G-agent simulants, paraoxon and diphenyl chlorophosphate (DPCP), were efficient...
متن کاملEpoxidation of chiral camphor N-enoylpyrazolidinones with methyl(trifluoromethyl)dioxirane and urea hydrogen peroxide/acid anhydride: reversal of stereoselectivity.
Both diastereomeric isomers of epoxides with high optical purity are obtained when camphor N-methacryloylpyrazolidinone (1a) and N-tigloylpyrazolidinone (1b) are treated with a urea hydrogen peroxide/TFAA and methyl(trifluoromethyl)dioxirane, respectively.
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ژورنال
عنوان ژورنال: Designed Monomers and Polymers
سال: 2011
ISSN: 1568-5551
DOI: 10.1163/138577211x555794