The preparation of heterobiaryl phosphonates via the Stille coupling reaction
作者:Gordon Kennedy、Alcide D. Perboni
DOI:10.1016/0040-4039(96)01674-7
日期:1996.10
The Stille cross-coupling reaction between various heteroarylstannanes and substituted bromo-benzylphosphonates was used to prepare heterobiarylphosphonates in moderate to good yields.
C-9a and aromatic substitutes at the C-4 position were designed, synthesized, and evaluated for their inhibitory activity to PAR-1. Several compounds showed good potency in antagonist activity based on the intracellular calcium mobilization assay and excellent pharmacokinetics profile in rats. Among these analogues, 3d exhibited excellent PAR-1 inhibitory activity (IC50 = 0.18 μM) and the lower ability
UV–vis absorption and emission spectroscopic and electrochemical measurements. Both 1pPE and 1bPE complexes exhibited similar UV–vis absorption and emission spectra and cyclic voltammograms as those of nonmodified complex [Ir(ppy)2(bpy)](PF6) (1), indicating the suitability for photocatalytic H2-evolution reaction. 3MLCT emissions of both 1bPE and 1pPE were quenched by electron transfer from triethylamine