Visible Light-Induced α-C(sp<sup>3</sup>)–H Acetalization of Saturated Heterocycles Catalyzed by a Dimeric Gold Complex
作者:Xiaojia Si、Lumin Zhang、Zuozuo Wu、Matthias Rudolph、Abdullah M. Asiri、A. Stephen K. Hashmi
DOI:10.1021/acs.orglett.0c01924
日期:2020.8.7
situ-formed gold complex. The broad functional group compatibility and substrate scope indicate that our strategy is a promising way to synthesize acetal analogues. The method was successfully applied in late-stage modifications of bioactive molecules. Gramscale syntheses and mechanistic studies are also presented.
Treatment of different types of alcohols with tetrahydrofuran (THF) in the presence of VCl3 and CCl4 smoothly afforded the corresponding THF-based acetals in excellent yields. The reaction is fast at room temperature, and several functional groups are tolerated, with no racemization being observed. A radical mechanism, based on Cl3C. as the active species, is proposed for this novel kind of transformation
Aminosilyl-Substituted Diarylethene Compounds for Anionic Polymerisation
申请人:Trinseo Europe GmbH
公开号:US20170204119A1
公开(公告)日:2017-07-20
The invention related to novel compounds useful as modifying monomers and precursors for polymerization initiators. The invention further relates to a method of making the polymerization initiators and resulting polymers. The invention also relates to polymer compositions comprising the polymer of the invention and further components such as extender oils, fillers, vulcanizing agents etc., and to corresponding vulcanized polymer compositions and articles comprising vulcanized parts made from the vulcanized polymer composition.
[EN] SILANE SULFIDE MODIFIED ELASTOMERIC POLYMERS<br/>[FR] POLYMÈRES ÉLASTOMÈRES MODIFIÉS PAR UN SULFURE DE SILANE
申请人:STYRON EUROPE GMBH
公开号:WO2014040639A1
公开(公告)日:2014-03-20
The present invention relates to silane sulfide modifier compounds and methods of making them. The invention also relates to a silane sulfide modified macromolecular compound obtainable by reacting a living anionic elastomeric polymer and a silane sulfide modifier. The silane sulfide modified macromolecular compound may be provided in the form of a polymer composition, and the polymer composition may be vulcanized (cross-linked) by making use of and reaction with at least one vulcanization agent, resulting in a vulcanized polymer composition.
[EN] METALLATED BENZYLSILANES AND THEIR USE AS POLYMERIZATION INITIATORS<br/>[FR] BENZYLSILANES MÉTALLÉS ET LEUR UTILISATION EN TANT QU'INITIATEURS DE POLYMÉRISATION
申请人:TRINSEO EUROPE GMBH
公开号:WO2018150043A1
公开(公告)日:2018-08-23
The invention relates to novel compounds useful as polymerization initiators or precursors for polymerization initiators. The invention further relates to a method of making the polymerization initiators and resulting polymers. The invention also relates to polymer compositions comprising the polymer of the invention and further components such as extender oils, fillers, vulcanizing agents etc., and to corresponding vulcanized polymer compositions and articles comprising vulcanized parts made from the vulcanized polymer composition.