Remote C(sp
<sup>3</sup>
)−H Arylation and Vinylation of
<i>N</i>
‐Alkoxypyridinium Salts to δ‐Aryl and δ‐Vinyl Alcohols
作者:Xu Bao、Qian Wang、Jieping Zhu
DOI:10.1002/chem.201902918
日期:2019.9.6
arylboronic and vinylboronicacids afforded δ-aryl and δ-vinyl alcohols, respectively, in the presence of fac-Ir(ppy)3 and Cu(OTf)2 dual catalysts. The reaction takes place through a domino process involving the reductive generation of alkoxyl radicals, 1,5-hydrogen atom transfer (1,5-HAT) and the copper-catalyzed cross-coupling reaction of the resulting translocated carbon radicals with boronic acids. Complementary
The present invention relates to a process for producing a composite material. A radiation-curable water-compatible composition is applied to the surface of a substrate having a high water content, wherein the composition comprises at least one radiation-polymerisable monomer and/or oligomer, whereby the composition wets the surface of the substrate. The composition on the substrate is then irradiated to produce the composite material. Optionally the monomer and/or oligomer is reacted with a phosphite or a triorganophosphine prior to the irradiation. These compositions may also be applied to low water content substrates.
Iridium‐Catalyzed Chemo‐, Diastereo‐, and Enantioselective Allyl‐Allyl Coupling: Accessing All Four Stereoisomers of (
<i>E</i>
)‐1‐Boryl‐Substituted 1,5‐Dienes by Chirality Pairing
We report an iridium-catalyzed highly chemo-, diastereo-, and enantioselective allyl-allylcoupling between branched allyl alcohols and α-silyl-substituted allylboronate esters resulting in enantioenriched (E)-1-boryl-substituted 1,5-dienes. All four stereoisomers with two adjacent chiral centers were obtained by chirality pairing. Mechanistic studies were conducted to understand the high levels of