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
Access to the γ-amino-β,γ-unsaturated acyl scaffold was established by applying xanthate chemistry to enamides. This original β-C(sp2)–H alkylation is regioselective and exhibits broad substrate scope and good functional group tolerance. The large availability of xanthates is advantageous to the scope of the reaction which combines a radical process and a polar reaction.
Unprecedented copper-catalyzed asymmetric conjugate addition of organometallic reagents to α,β-unsaturated lactams
作者:Mauro Pineschi、Federica Del Moro、Francesca Gini、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1039/b403793f
日期:——
For the first time, an excellent enantioselectivity has been obtained in the conjugateaddition of hard organometallic reagents to alpha,beta-unsaturated lactams bearing appropriate protecting-activating groups on the nitrogen.
Synthesis of N-heterocycles via lactam-derived ketene aminal phosphates. Asymmetric synthesis of cyclic amino acids.
作者:K. C. Nicolaou、Kenji Namoto
DOI:10.1039/a804198i
日期:——
A variety of N-heterocycles can be synthesized from lactams via Pd0-catalyzed couplings of their corresponding enol phosphates.
多种N-杂环可以通过Pd0催化的其相应烯醇磷酸酯的偶联反应,从内酰胺合成。
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.