626-44-8Relevant articles and documents
Preparation of Functionalized Diorganomagnesium Reagents in Toluene via Bromine or Iodine/Magnesium-Exchange Reactions
Desaintjean, Alexandre,Danton, Fanny,Knochel, Paul
supporting information, p. 4461 - 4476 (2021/08/13)
A wide range of polyfunctionalized di(hetero)aryl- and dialkenyl-magnesium reagents are prepared in toluene within 10 to 120 minutes between 78 C and 25 C via an I/Mg- or Br/Mg-exchange reaction using reagents of the general formula R2Mg (R = sBu, Mes). Highly sensitive functional groups, such as triazene or nitro, are tolerated in these exchange reactions, enabling the synthesis of various functionalized (hetero)arene and alkene derivatives after quenching with several electrophiles including allyl bromides, acyl chlorides, aldehydes, ketones, and aryl iodides.
Polyfluorinated functionalized m-terphenyls. New substituents and ligands in organometallic synthesis
Olaru, Marian,Beckmann, Jens,Rat, Ciprian I.
, p. 3012 - 3020 (2014/07/08)
The synthesis and structural characterization of polyfluorinated arenes 2,4,6-(C6F5)3C6H2X and 2,6-(C6F5)2-4-BrC6H2X (X = NO2, Cl, Br) obtained in the Ullmann-type cross coupling reaction is reported. The nitro derivatives were reduced to the aromatic amines. The α-diimine [2,4,6-(C6F5)3C 6H2NCMe]2 and 2,4,6-(C6F 5)3C6H2I were obtained in condensation and Sandmeyer reactions, respectively, from the corresponding amine. The syntheses of 2,4,6-(C6F5)3C 6H2NHC(O)H, 2,4,6-(C6F5) 3C6H2NC, and 2,4,6-(C6F 5)3C6H2Si(X)Me2 (X = H, F, Cl) are also described.
Optically active, amphiphilic poly(meta -phenylene ethynylene)s: Synthesis, hydrogen-bonding enforced helix stability, and direct AFM observation of their helical structures
Banno, Motonori,Yamaguchi, Tomoko,Nagai, Kanji,Kaiser, Christian,Hecht, Stefan,Yashima, Eiji
, p. 8718 - 8728 (2012/06/30)
Optically active, amphiphilic poly(meta-phenylene ethynylene)s (PPEa) bearing l- or d-alanine-derived oligo(ethylene glycol) side chains connected to the backbone via amide linkages were prepared by microwave-assisted polycondensation. PPEa's exhibited an intense Cotton effect in the π-conjugated main-chain chromophore regions in various polar and nonpolar organic solvents due to a predominantly one-handed helical conformation stabilized by an intramolecular hydrogen-bonding network between the amide groups of the pendants. The stable helical structure was retained in the bulk and led to supramolecular column formation from stacked helices in oriented polymer films as evidenced by X-ray diffraction. Atomic force microscopy was used to directly visualize the helical structures of the polymers in two-dimensional crystalline layers with molecular resolution, and, for the first time, their absolute helical senses could unambiguously be determined.