Ligand-controlled reactivity plays an important role in transition-metal catalysis, enabling a vast number of efficient transformations to be discovered and developed. However, a single ligand is generally used to promote all steps of the catalytic cycle (e.g., oxidative addition, reductive elimination), a requirement that makes ligand design challenging and limits its generality, especially in relay
Allyl boron derivatives are valuable building blocks in the synthesis of natural products and bioactive molecules. Herein, a practical strategy of nickel-catalyzed highly selective hydroalkenylation of alkenyl boronicesters was developed. Under the mild reaction conditions, a variety of allyl boronicesters were accessed with excellent chemo- and regioselectivity. The mechanism of this transformation
Rhodium-Catalyzed Dehydrogenative Borylation of Aliphatic Terminal Alkenes with Pinacolborane
作者:Masao Morimoto、Tomoya Miura、Masahiro Murakami
DOI:10.1002/anie.201506328
日期:2015.10.19
Aliphatic terminal alkenes react with pinacolborane at ambienttemperature to afford dehydrogenative borylation compounds as the major product when iPr‐Foxap is used as the ligand with cationic rhodium(I) in the presence of norbornene, which acts as the sacrificial hydrogen acceptor. The reaction is applied to the one‐pot syntheses of aldehydes and homoallylic alcohols from aliphatic terminal alkenes
Enantioselective Synthesis of Anti Homoallylic Alcohols from Terminal Alkynes and Aldehydes Based on Concomitant Use of a Cationic Iridium Complex and a Chiral Phosphoric Acid
We report a highly diastereo- and enantioselective synthesis of anti homoallylic alcohols fromterminalalkynes via (E)-1-alkenylboronates based upon two catalytic reactions: a cationic iridium complex-catalyzed olefin transposition of (E)-1-alkenylboronates and a chiral phosphoric acid-catalyzed allylation reaction of aldehydes.
Copper-Catalyzed Highly Selective Hydrosilylation of Silyl or Boryl Alkene: A Method for Preparing Chiral Geminated Disilyl and Borylsilyl Reagents
作者:Min Zhang、Yuqi Ji、Zheng Zhang、Chun Zhang
DOI:10.1021/acs.orglett.2c00858
日期:2022.4.15
The copper-catalyzedhighlyselective hydrosilylation of silyl or boryl alkene has been developed. This chemistry could afford a practical method for preparing chiral geminated disilyl and borylsilyl reagents, which are useful organosilanes and versatile synthons for organic synthesis. The experimental data suggested that this reaction could be compatible with a variety of functional groups. Furthermore