作者:Ludovic Jean、Michael Pouliquen、Jérôme Blanchet、Marie-Claire Lasne、Jacques Rouden
DOI:10.1007/s11426-010-4056-2
日期:2010.9
Enantiopure 2-(dicyclohexylphosphino)-1,1′-biphenyl derivatives substituted in the 2′-position by a chiral amino group were prepared. For the compound bearing an acyclic chiral chain, the key step was a Suzuki coupling between bromobenzeneboronic acid and N-Boc-iodoaniline whereas an aromatic nucleophilic substitution allowed the introduction of a chiral pyrrolidine in the 2′-position of the biphenyl backbone. The efficiency of the P,N-biphenyl pyrrolidine derivatives as ligands in Pd-catalyzed arylaminations compares well with that of DavePhos ligand.
合成了在2′-位被手性
氨基取代的对映纯2-(双环己基
磷酰基)-1,1′-
联苯衍
生物。对于具有非环状手性链的化合物,关键步骤是
溴苯硼酸与N-Boc-
碘化
苯胺之间的铃木偶联反应,而芳香族亲核取代反应则允许在
联苯主链的2′-位引入手性
吡咯烷。P,N-
联苯吡咯烷衍
生物作为
配体在Pd催化的芳基
氨化反应中的效率与DavePhos
配体相当。