Metal-free homoallylic oxygen-directed intramolecular hydroboration is reported. Regioselectivities from 20:1 to 82:1 favoring the 1,3-dioxy-substituted products have been achieved using Me2S center dot BH3/TfOH followed by standard oxidative workup. Branching at the C5 position improves regioselectivity.
Regioselective, Asymmetric Formal Hydroamination of Unactivated Internal Alkenes
作者:Yumeng Xi、Trevor W. Butcher、Jing Zhang、John F. Hartwig
DOI:10.1002/anie.201509235
日期:2016.1.11
We report the regioselective and enantioselective formalhydroamination of unsymmetrical internalalkenes catalyzed by a copper catalyst ligated by DTBM‐SEGPHOS. The regioselectivity of the reaction is controlled by the electronic effects of ether, ester, and sulfonamide groups in the homoallylic position. The observed selectivity underscores the influence of inductive effects of remote substituents
Courtois,G.; Miginiac,L., Comptes Rendus des Seances de l'Academie des Sciences, Serie C: Sciences Chimiques, 1977, vol. 285, p. 207 - 209
作者:Courtois,G.、Miginiac,L.
DOI:——
日期:——
[EN] CHEMICAL RECYCLING OF SOLVOLYSIS COPRODUCT STREAMS<br/>[FR] RECYCLAGE CHIMIQUE DE FLUX DE COPRODUITS DE SOLVOLYSE
申请人:EASTMAN CHEM CO
公开号:WO2021211520A1
公开(公告)日:2021-10-21
Chemical recycling facilities for processing mixed waste plastic are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy recovery facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.