Synthetic Approaches to Zigzag-Shaped Oligophenylene Strands Laterally Decorated with Hydroxy Functions
作者:Carine Diebold、David Michael Weekes、Maria Torres Navarrete、Pierre Mobian、Nathalie Kyritsakas、Marc Henry
DOI:10.1002/ejoc.201001058
日期:2010.12
Two nanosized zigzag-shapedoligophenylenestrands incorporating 2,2′-biphenol units were prepared by Suzuki–Miyaura coupling methodology. The two strands are made up of ten and seven phenyl rings, respectively. Two synthetic pathways were evaluated. The first involved the preparation of the target oligophenylene molecules by a sequential approach, whereas the second entailed the formation of the precursors
Synthesis of a chiral N-heterocyclic carbene bearing a m-terphenyl-based phosphate moiety as an anionic N-substituent and its application to copper-catalyzed enantioselective boron conjugate additions
作者:Tomohiro Iwai、Yuki Akiyama、Masaya Sawamura
DOI:10.1016/j.tetasy.2013.05.013
日期:2013.6
A chiralN-heterocycliccarbene (NHC) ligand 1a bearing a m-terphenyl-based phosphate moiety as an anionic N-substituent has been developed. A rhodium complex [Rh(1a)(cod)]2 was synthesized and its structure was characterized by NMR and ESI-MS spectroscopy. This ligand gave high enantioselectivities in copper-catalyzed enantioselective boron conjugate additions to an α,β-unsaturated ester to give a