The palladium-catalyzed cross-coupling reaction of 3,4-bis(tributylstannyl)furan-2(5H)-one using chelating ligand or polar solvent gives mixtures of single and double coupled products, even when one equivalent of halide coupling partner is used. After optimization, the double coupling reaction was shown to be general, with the use of two equivalents of aryl iodides giving 3,4-disubstituted furanones
Synthesis of<sup>18</sup>F-labelled cyclooxygenase-2 (COX-2) inhibitors via Stille reaction with 4-[<sup>18</sup>F]fluoroiodobenzene as radiotracers for positron emission tomography (PET)
作者:Frank R. Wüst、Aileen Höhne、Peter Metz
DOI:10.1039/b412871k
日期:——
The Stille reaction with 4-[(18)F]fluoroiodobenzene as a novel approach for the synthesis of radiotracers for monitoring COX-2 expression by means of PET has been developed. Optimized reaction conditions were elaborated by screening of various catalyst systems and solvents. By using optimized reaction conditions (18)F-labelled COX-2 inhibitors [(18)F]-5 and [(18)F]-13 could be obtained in radiochemical