Visible‐Light Controlled Divergent Catalysis Using a Bench‐Stable Cobalt(I) Hydride Complex
作者:Enrico Bergamaschi、Frédéric Beltran、Christopher J. Teskey
DOI:10.1002/chem.202000410
日期:2020.4.21
the ability to switch the actual function of the catalyst and resulting products. Here we report such an example of multi-dimensional catalysis. Featuring an easily prepared, bench-stable cobalt(I) hydride complex in conjunction with pinacolborane, we can switch the reaction outcome between two widely employed transformations, olefin migration and hydroboration, with visible light as the trigger.
gels are prepared by treatment of polymethylhydrosiloxane with diols in the presence of (mu(3),eta(2),eta(3),eta(5)-acenaphthylene)Ru(3)(CO)(7), and act as reusable catalysts in the isomerization of alkenes without leakage of the catalyst species.
[EN] SURFACE PRIMER COMPOSITIONS AND METHODS OF USE<br/>[FR] COMPOSITIONS DE COUCHE PRIMAIRE DE SURFACE ET PROCÉDÉ D'UTILISATION
申请人:ACATECHOL INC
公开号:WO2017132463A1
公开(公告)日:2017-08-03
In one embodiment, the present application discloses a surface binding compound of the Formula I or Formula II: wherein the variables EG, EG1, SP1, SP2, SP3, Ar and BG are as defined herein. In another embodiment, the application discloses a method for forming a coating on a surface of a substrate using the surface binding compound of the Formula I or Formula II.
[EN] A PROCESS FOR THE PREPARATION OF UV ABSORBERS<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ABSORBEURS UV
申请人:BASF SE
公开号:WO2020144094A1
公开(公告)日:2020-07-16
The presently claimed invention relates to a novel, highly efficient and general process for the preparation of UV absorbers.
目前所声称的发明涉及一种新颖、高效和通用的紫外线吸收剂制备过程。
Inter- and Intramolecular Hetero-Diels-Alder Reactions; Part 50: Domino Reactions in Organic Chemistry: The Knoevenagel-hetero-Diels-Alder-Hydrogenation Sequence for the Biomimetic Synthesis of Indole Alkaloids via Strictosidine Analogues
作者:Lutz F. Tietze、Jürgen Bachmann、Jürgen Wichmann、Olaf Burkhardt
DOI:10.1055/s-1994-25669
日期:——
A new biomimetic access to indole alkaloid derivatives via strictosidine analogues is described using a highly efficient and selective domino reaction consisting of a tandem Knoevenagel-hetero-Diels-Alder-hydrogenation sequence. In a three component reaction of the aldehyde 27f, the 1,3-dicarbonyl compound 28 and the enol ether 30a a 1 : 1-mixture of 31c and 31d is obtained in 91% yield which after hydrogenation gives the indole alkaloid derivative 35a belonging to the pseudo series as a single compound. Similarly, reaction of 27f, 28 and 30b also affords 35a after hydrogenation as the only compound. In the domino reaction of 27e, 28 and 30a the indole alkaloid derivative 36b of the normal type is formed in 46% yield.