Nickel-Catalyzed Homo- and Cross-Coupling of Allyl Alcohols via Allyl Boronates
作者:Yi Gan、Hui Hu、Yuanhong Liu
DOI:10.1021/acs.orglett.0c01424
日期:2020.6.5
allylic alcohols to 1,5-dienes in the presence of B2pin2 with excellent regioselectivity has been developed. Mechanistic studies indicate that the reaction proceeds via sequential nickel-catalyzed borylation of allylalcohols followed by cross-coupling of the resulting allyl boronates with allylalcohols. The method was effectively applied to nickel-catalyzed allylation of aldehydes using allylic alcohols
Polymer-Incarcerated Gold−Palladium Nanoclusters with Boron on Carbon: A Mild and Efficient Catalyst for the Sequential Aerobic Oxidation−Michael Addition of 1,3-Dicarbonyl Compounds to Allylic Alcohols
作者:Woo-Jin Yoo、Hiroyuki Miyamura、Shu̅ Kobayashi
DOI:10.1021/ja110142y
日期:2011.3.9
immobilized tetravalent boron catalyst for the Michael reaction. In addition, we found bimetallic Au-Pd nanoclusters to be particularly effective for the aerobicoxidation of allylic alcoholsunder base- and water-free conditions. The ability to conduct the reaction under relatively neutral and anhydrous conditions proved to be key in maintaining good catalyst activity during recovery and reuse of the catalyst
Nickel-Catalyzed C(sp<sup>3</sup>)–H Functionalization of Benzyl Nitriles: Direct Michael Addition to Terminal Vinyl Ketones
作者:Ninghui Zhang、Chunli Zhang、Xiaoping Hu、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.1c02074
日期:2021.8.6
An efficient nickel(0)-catalyzed addition of benzyl nitriles to terminal vinyl ketones via C(sp3)–H functionalization has been developed. The reaction provides a novel and efficient protocol for the synthesis of α-functionalized benzyl nitriles with a wide range of structural diversity under mild reaction conditions while obviating the use of a strong base. The work might be potentially useful toward
Expanding the scope of the Babler–Dauben oxidation: 1,3-oxidative transposition of secondary allylic alcohols
作者:Patrick M. Killoran、Steven B. Rossington、James A. Wilkinson、John A. Hadfield
DOI:10.1016/j.tetlet.2016.07.076
日期:2016.8
We report the catalytic chromium-mediated oxidation of secondary allylicalcohols to give α,β-unsaturated aldehydes with exclusive (E)-stereoselectivity. This facile procedure employs catalytic PCC (5 mol %) and periodic acid (H5IO6) as a co-oxidant. This transformation occurs specifically with aromatic substituted allyl alcohols containing both electron withdrawing and electron donating substituents
Cobalt-Catalyzed Diastereo- and Enantioselective Reductive Allyl Additions to Aldehydes with Allylic Alcohol Derivatives via Allyl Radical Intermediates
enantioenriched homoallylic alcohols with a remarkably broad scope of allyl groups that can be introduced. Mechanistic studies indicated that allyl radical intermediates were involved in this process. These new discoveries establish a new strategy for development of enantioselective transformations through capture of radicals by chiral Co complexes, pushing forward the frontier of Co complexes for enantioselective