Divergent Synthesis of 2,5-Diarylphospholes Based on Cross-coupling Reactions: Substituent Effects on the Optical and Redox Properties of Benzene–Phosphole–Benzene π-Systems
Divergent synthesis of 2,5-diarylphosphole derivatives was achieved by using two kinds of Pd-catalyzed cross-coupling reactions. In addition, para- and P-substituent effects on the optical and redox properties of the benzene–phosphole–benzene π-systems were disclosed experimentally.
Copper-Mediated Radiofluorination of Arylstannanes with [<sup>18</sup>F]KF
作者:Katarina J. Makaravage、Allen F. Brooks、Andrew V. Mossine、Melanie S. Sanford、Peter J. H. Scott
DOI:10.1021/acs.orglett.6b02911
日期:2016.10.21
A copper-mediated nucleophilic radiofluorination of aryl- and vinylstannanes with [18F]KF is described. This method is fast, uses commercially available reagents, and is compatible with both electron-rich and electron-deficient arene substrates. This method has been applied to the manual synthesis of a variety of clinically relevant radiotracers including protected [18F]F-phenylalanine and [18F]F-DOPA
Copper(II)-Mediated [<sup>11</sup>C]Cyanation of Arylboronic Acids and Arylstannanes
作者:Katarina J. Makaravage、Xia Shao、Allen F. Brooks、Lingyun Yang、Melanie S. Sanford、Peter J. H. Scott
DOI:10.1021/acs.orglett.8b00242
日期:2018.3.16
A copper-mediated method for the transformation of diverse arylboron compounds and arylstannanes to aryl-[11C]-nitriles is reported. This method is operationally simple, uses commercially available reagents, and is compatible with a wide variety of substituted aryl- and heteroaryl substrates. This method is applied to the automated synthesis of high specific activity [11C]perampanel in 10% nondecay-corrected
作者:Richard R Hark、Diane B Hauze、Olga Petrovskaia、Madeleine M Joullié
DOI:10.1139/v01-143
日期:2001.11.1
Ninhydrin is an essential tool in the analysis of amino acids, peptides, and proteins, and the preferred re - agent for the detection of latent fingerprints on porous surfaces. The goal of this investigation was to prepare ninhydrinanalogs with enhanced chromogenic and fluorogenic properties. Target compounds included structures with extended conjugation and (or) with the presence of sulfur-containing
Mechanistic Study of the Palladium-Catalyzed Stereoselective Cross-Coupling Reaction of 1,1-Dibromo-3,3,3-trifluoro-2-tosyloxypropene
作者:Masaki Shimizu、Youhei Takeda、Tamejiro Hiyama
DOI:10.1246/bcsj.20110240
日期:2011.12.15
We prepared a Pd complex by the oxidative addition of 1,1-dibromo-3,3,3-trifluoro-2-tosyloxypropene to [Pd(PPh3)4]. The atomic distance between Pd and F in the complex was 2.95 A, which was shorter...