Pd‐Catalyzed Synthesis of Biphenyls with Methylthio Group
作者:Zhiqiang Zhang、Zhizhi Hu、Zhixiao Yu、Haijun Chi、Peng Lei、Yue Wang、Ren He
DOI:10.1080/00397910601131049
日期:2007.3
Abstract The synthesis of unsymmetrical biaryls with a methylthiogroup is achieved using the air‐stable palladium–phosphinous acid complexes, [(t‐Bu)2P(OH)]2 PdCl2 (POPd), as the catalyst. A great variety of substituted bromobenzenes having electron‐withdrawing and electron‐donating functional groups in para and meta positions have been successfully coupled with 3‐methylthiophenylboronic acid.
The preparation of sulfur-containing aryl and heteroaryl vinyl co-monomers via Suzuki-Miyaura cross-coupling between the corresponding mercaptomethyl arylboronates and in situ-generated vinyl bromides is described. Surface-enhanced Raman scattering (SERS) studies of the target compounds on gold nanoparticles confirmed their potential as spectroscopic tags in the fabrication of SERS-encoded polymers for combinatorial screening and biomedical diagnostics. (C) 2009 Elsevier Ltd. All rights reserved.