An Efficient and Reliable Catalyst System Using Hemilabile Aphos for<i>B</i>-Alkyl Suzuki-Miyaura Cross-Coupling Reaction with Alkenyl Halides
作者:Ning Ye、Wei-Min Dai
DOI:10.1002/ejoc.201201602
日期:2013.2
using the catalyst consisting of Pd(OAc)2 and a hemilabile P,O-ligand, Aphos-Y, under mild reaction conditions (K3PO4·3H2O, THF/H2O, room. temp.). For applications in the total synthesis of structurally complex natural products, the Johnson protocol commonly uses two ligands (dppf and Ph3As) and two organic solvents (THF and DMF). In contrast, the new version reported here employs one ligand (Aphos-Y)
作者:Kwang-Seuk Ko、Matthew D. Alexander、Shaun D. Fontaine、James E. Biggs-Houck、James J. La Clair、Michael D. Burkart
DOI:10.1039/c0ob00540a
日期:——
Two approaches are presented for the synthesis of the macrolide core of the mycolactone polyketides. The first intertwines ring closing metathesis (RCM) within a two-step Julia olefination protocol, while the second intercepts the optimized routes of Kishi, thereby providing formal access to the mycolactones.