“Clickphine”: A Novel and Highly Versatile P,N Ligand Class via Click Chemistry
摘要:
A novel P,N-type ligand family (ClickPhine) is disclosed that is easily accessible using the Cu(I)-catalyzed azide-alkyne "click" cycloaddition. A diverse set of ligands was made in just three steps from readily available starting materials to give several homogeneous and a heterogeneous catalyst. Preliminary experiments show the efficacy of these ligands in the Pd-catalyzed allylic alkylation reaction.
Stereoselective N-Glycosylation by Staudinger Ligation
作者:Yi He、Ronald J. Hinklin、Jiyoung Chang、Laura L. Kiessling
DOI:10.1021/ol048271s
日期:2004.11.1
Stereoselective methods for the chemical synthesis of beta-N-glycosyl amides are needed to generate glycopeptides and glycoproteins. Here, we report that the Staudingerligation can be used to form glycosylated asparagine derivatives. The reaction proceeds with high stereoselectivity, and a variety of glycosylazides can function as substrates. Our results provide precedence for the use of this powerful
Synthesis and reactions of phosphine-boranes. Synthesis of new bidentate ligands with homochiral phosphine centers via optically pure phosphine-boranes
作者:Tsuneo Imamoto、Toshiyuki Oshiki、Takashi Onozawa、Tetsuo Kusumoto、Kazuhiko Sato