Phosphinates as new electrophilic partners for cross-coupling reactions
作者:Jun Guo、John D. Harling、Patrick G. Steel、Tom M. Woods
DOI:10.1039/b809577a
日期:——
The use of enol phosphinates as electrophiles for cross-coupling reactions has been explored. Both boronic acids (Suzuki–Miyaura reaction) and stannanes (Stille reaction) couple efficiently with lactam derived phosphinates.
Enol Phosphinates and Phosphonates: Practical Electrophiles for Cross-Coupling Strategies
作者:Patrick Steel、Tom Woods
DOI:10.1055/s-0029-1217067
日期:2009.11
Enol phosphinates and phosphonates can be readily prepared from simple lactams in high yields and are both stable and storable. Both these substrates can be employed successfully in homogeneous Suzuki-Miyaura and Stille cross-couplings protocols. Additionally, the phosphonate group can be immobilised on a phenol-on-polystyrene resin and utilised in a simple diversity linker strategy in which the coupled
Catalytic Allylic Oxidation of Cyclic Enamides and 3,4-Dihydro-2<i>H</i>-Pyrans by TBHP
作者:Yang Yu、Ranad Humeidi、James R. Alleyn、Michael P. Doyle
DOI:10.1021/acs.joc.7b01163
日期:2017.8.18
intermediate allylic free radical two sites for oxidative product formation are possible, and the selectivity of the oxidative process varies with the heteroatom when R = H. Cyclic enamides produce 4-piperidones in good yields when R = alkyl or aryl, but oxidation of 2H-pyrans also gives alkyl cleavage products. Alternative catalysts for TBHP oxidations show comparable selectivities but give lower product