Zobrazeno 1 - 10
of 1 209
pro vyhledávání: '"A. Beck"'
Publikováno v:
ChemInform. 47
The first enantioselective total synthesis of the cytotoxic natural product (+)-psiguadial B is reported. Key features of the synthesis include (1) the enantioselective preparation of a key cyclobutane intermediate by a tandem Wolff rearrangement/asy
Autor:
Bernhard Breit, Thorsten M. Beck
Publikováno v:
ChemInform. 47
The title reaction has a broad substrate scope and provides valuable branched α-allylated 1,3-dicarbonyl compounds in often very high yields.
Publikováno v:
ChemInform. 47
As a new method for the synthesis of chalcogen polycationic clusters, the electrochemical dissolution of elemental tellurium in ionic liquids (IL) or in liquid SO2 is presented. ILs used are ethylmethylimidazolium triflate [OTf](-) and tetraalkylammo
Autor:
Johannes Beck, Jakoah Brgoch, Dennis B. Henge, Norbert Wagner, Barbara Albert, Martin Hermus, Christian Litterscheid
Publikováno v:
ChemInform. 46
A new polymorph of MnP4 was prepared by reaction of the elements via chemical vapor transport with iodine as transporting agent. The crystal structure was refined using single-crystal diffraction data (space group Cc, no. 9, a = 5.1049(8) A, b = 10.5
Publikováno v:
ChemInform. 46
Reactions of Te or Se with Bi or Sb in GaCl3 and AlI3 melts in the presence of SbCl3, BiCl3, or SbCl3 as weak oxidants yield the compounds (Sb2Te2)[GaCl4] (I), (Sb2Te2)I[AlI4] (II), (Bi2Te2)Cl[GaCl4] (III), (Bi2Se2)Cl[GaCl4] (IV), (Sb3Te4)[GaCl4] (V)
Publikováno v:
ChemInform. 46
Publikováno v:
ChemInform. 46
Colorless, highly hygroscopic crystals of the title compound are synthesized from a mixture of Sb, SbCl3, Sb2O3, GaCl3, and Te (glass ampule, Ar, 6 x 10-2 mbar, 50 °C, 19 d).
Autor:
Andreas Eich, Johannes Beck
Publikováno v:
ChemInform. 46
Single crystals of the title compound are grown by reaction of Sb2Te3 with SbCl3 in a GaCl3-rich CuGaCl4 melt in presence of Sb2O3 (evacuated glass ampoule, 100 °C, 45 d).
Publikováno v:
ChemInform. 45
A variety of phenylalanine-derived cis- and trans-imidazolidinones is prepared in pure form.
Publikováno v:
ChemInform. 45