Oxidative Cyclorelease from Soluble Polymeric Supports
摘要:
Single electron oxidation is shown to be a viable method for effecting concomitant cyclization and cleavage (cyclorelease) of a series of polymer bound homobenzylic ethers. Soluble oligonorbornene polymers are stable toward redox chemistry and are isolable through precipitation with methanol, making them excellent supports for this process. These oxidative conditions are also shown to cleave secondary and tertiary alcohols and ethers in a new traceless approach to polymer-supported aldehyde and ketone synthesis.
Oxidative Cyclorelease from Soluble Polymeric Supports
摘要:
Single electron oxidation is shown to be a viable method for effecting concomitant cyclization and cleavage (cyclorelease) of a series of polymer bound homobenzylic ethers. Soluble oligonorbornene polymers are stable toward redox chemistry and are isolable through precipitation with methanol, making them excellent supports for this process. These oxidative conditions are also shown to cleave secondary and tertiary alcohols and ethers in a new traceless approach to polymer-supported aldehyde and ketone synthesis.
POLYMERIZABLE COMPOSITIONS AND MOLDED ARTICLES PRODUCED BY USING THE SAME
申请人:ZEON CORPORATION
公开号:EP1655321A1
公开(公告)日:2006-05-10
The present invention provides a polymerizable composition and a resin formed object capable of providing a crosslinked cycloolefin resin formed object and a crosslinked cycloolefin resin composite excellent in heat resistance, more specifically, a polymerizable composition comprising a cycloolefin mixture containing 0.1 to 50% by mole of a cycloolefin having, as a substituent group, a monovalent group including an aliphatic carbon-carbon unsaturated bond, a metathesis polymerization catalyst, and a radical generating agent; and formed objects produced by using a polymerizable composition described above which preferably further comprises a chain transfer agent and making the cycloolefin mixture undergo at least ring-opening polymerization.
Cp2ZrCl2-catalyzed hydroalumination of norbornene derivatives withi-Bu2AlCl
作者:A. G. Ibragimov、D. L. Minsker、A. A. Berg、O. V. Shitikova、S. I. Lomakina、U. M. Dzhemilev
DOI:10.1007/bf01150750
日期:1992.12
Cp2ZrCl2-catalyzed (Cp = eta5-C5H5) hydroalumination of substituted norbornenes with i-Bu2AlCl was conducted, yielding higher cycloalkylhaloalanes with high yields.
LOPATIK D. V.; OSIPENKO I. F.; PROKOPOVICH I. P.; BULATSKAYA N. G., REDKOL. ZH. IZV. AN BSSR. CEP. XIM. N. MINSK, 1980, 9 S., BIBLIOGR. 7 NAZ+
作者:LOPATIK D. V.、 OSIPENKO I. F.、 PROKOPOVICH I. P.、 BULATSKAYA N. G.
DOI:——
日期:——
Polymerizable composition and molded articles produced by using the same
申请人:Sugawara Tomoo
公开号:US20060258828A1
公开(公告)日:2006-11-16
The present invention provides a polymerizable composition and a resin formed object capable of providing a crosslinked cycloolefin formed object and a crosslinked cycloolefin resin composite excellent in heat resistance, more specifically, a polymerizable composition comprising a cycloolefin mixture containing 0.1 to 50% by mole of a cycloolefin having, as a substituent group, a monovalent group including an aliphatic carbon-carbon unsaturated bond, a metathesis polymerization catalyst, and a radical generating agent; and formed objects produced by using a polymerizable composition described above which preferably further comprises a chain transfer agent and making the cycloolefin mixture undergo at least ring-opening polymerization.