Platinum-Catalyzed Enantioselective Tandem Alkylation/Arylation of Primary Phosphines. Asymmetric Synthesis of P-Stereogenic 1-Phosphaacenaphthenes
作者:Brian J. Anderson、Marites A. Guino-o、David S. Glueck、James A. Golen、Antonio G. DiPasquale、Louise M. Liable-Sands、Arnold L. Rheingold
DOI:10.1021/ol801616s
日期:2008.10.16
Enantioselectivetandem alkylation/arylation of primary phosphines with 1-bromo-8-chloromethylnaphthalene catalyzed by Pt(DuPhos) complexes gave P-stereogenic 1-phosphaacenaphthenes (AcePhos) in up to 74% ee. Diastereoselective formation of four P-C bonds in one pot with bis(primary) phosphines gave C2-symmetric diphosphines, including the o-phenylene derivative DuAcePhos, for which the rac isomer
Fluorescent Detection of Chemical Warfare Agents: Functional Group Specific Ratiometric Chemosensors
作者:Shi-Wei Zhang、Timothy M. Swager
DOI:10.1021/ja029265z
日期:2003.3.1
Indicators providing highly sensitive and functional group specific fluorescent response to diisopropyl fluorophosphate (DFP, a nerve gas (G-agent) simulant) are reported. Nonemissive indicator 2 reacts with DFP to give a cyclized compound 2+A- that shows a high emission due to its highly planar and rigid structure. Very weak emission was observed by the addition of HCl. Another indicator based on pyridyl naphthalene exhibits a large shift in its emission spectrum after reaction with DFP, which provides for quantitative ratiometric detection.