Impregnated Copper on Magnetite as Recyclable Catalyst for the Addition of Alkoxy Diboron Reagents to C−C Double Bonds
作者:Rafael Cano、Diego J. Ramón、Miguel Yus
DOI:10.1021/jo100325e
日期:2010.5.21
A simple protocol for the borylation with use of impregnated copper on magnetite is described. The reactions showed a very broad scope and all type of olefins could be used with similar results. The catalyst could be easily removed by a magnet and it could be reused several times, showing similar activity.
New expanded-ring NHC platinum(0) complexes: Synthesis, structure and highly efficient diboration of terminal alkenes
作者:Sergey A. Rzhevskiy、Maxim A. Topchiy、Konstantin A. Lyssenko、Anna N. Philippova、Maria A. Belaya、Alexandra A. Ageshina、Maxim V. Bermeshev、Mikhail S. Nechaev、Andrey F. Asachenko
DOI:10.1016/j.jorganchem.2020.121140
日期:2020.4
The synthesis and structural characterization of a series of novel platinum(0) complexes were reported. A number of (NHC)Pt(dvtms) (dvtms = 1,3-divinyl-1,1,3,3-tetramethyldisiloxane) complexes were investigated in catalytic addition of B2Pin2 to terminal alkenes. The novel expanded ring N-heterocyclic carbene complex (7-Dipp)Pt(dvtms) showed highest performance, turnover numbers up to 3800 were achieved
alkynes and alkenes undersolvent‐ and ligand‐freeconditions in air. The cis‐1,2‐diborylalkenes and 1,2‐diborylalkanes were obtained in moderate to excellent yields following, in most cases, a simple filtration workup protocol. The versatility of the cis‐1,2‐diboronvinyl compounds was demonstrated in a series of organic transformations, including the Suzuki–Miyauracrosscoupling and the boron–halogen
carbon–heteroatom bonds. However, its potential application in the formation of carbon and phosphorus remains unexplored. In this study, we present an alkoxide base-promoted reaction system that enables deborylative phosphination of benzylic organoboronates and geminal bis(boronates) via selective C–B bondcleavage. This approach allows for the synthesis of valuable tertiary phosphines in good yields under
Asymmetric Diboration of Terminal Alkenes with a Rhodium Catalyst and Subsequent Oxidation: Enantioselective Synthesis of Optically Active 1,2-Diols
作者:Kenji Toribatake、Hisao Nishiyama
DOI:10.1002/anie.201305181
日期:2013.10.11
Pin it down: A highly enantioselective diboration of terminal alkenes with chiral 1 and bis(pinacolato)diboron (B2pin2) was realized. Subsequent oxidation of the diboron adducts with sodium peroxoborate readily gave the corresponding opticallyactive 1,2‐diols in high yields and high enantioselectivities.