Výsledky vyhledávání - "Reinhard Schwesinger"

A Short Novel Synthesis of the Phosphazene Base Et-P2

Autor: Tim Dambacher, Reinhard Schwesinger

Publikováno v: Zeitschrift für Naturforschung B. 61:1229-1233

A novel synthesis of the phosphazene base Et-P2 is presented, which approximately halves the efforts of its production.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df7e172e89a5a0f707abbcf7c6b5dc66
https://doi.org/10.1515/znb-2006-1007

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Extremely Strong, Uncharged Auxiliary Bases; Monomeric and Polymer-Supported Polyaminophosphazenes (P2-P5)

Autor: Helmut Schlemper, Heinz Wilhelm Rotter, M. Fletschinger, Christian Hasenfratz, Guo-Zen Ji, Hans Georg von Schnering, Leonhard Walz, Dietmar Putzas, Carol Ottaway, A. V. Satish, Thomas Breuer, Joachim Boele, Jürgen Willaredt, Karl Peters, Reinhard Schwesinger, Frederick G. Bordwell, Eva-Maria Peters, Tim Dambacher, Hans Fritz

Publikováno v: Liebigs Annalen. 1996:1055-1081

The syntheses and properties of novel, extremely strong uncharged polyaminophosphazene bases up to a high level of steric hindrance are described. Most of the systems were readily prepared in up to molar quantities and conveniently recovered from the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a115217c556e33aaa1953cb2e1a17430
https://doi.org/10.1002/jlac.199619960705

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An efficient homogeneous catalytic enantioselective synthesis of α-amino acid derivatives

Autor: Francisca Delgado, Martin J. O'Donnell, Reinhard Schwesinger, Curt Hostettler

Publikováno v: Tetrahedron Letters. 39:8775-8778

The catalytic enantioselective alkylation of the benzophenone imine of glycine t-butyl ester is realized by an efficient homogeneous reaction with alkyl halides, the neutral, non-ionic phosphazene base (BEMP or BTPP), and chiral quaternary ammonium s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77e270c29b0660315fa8316b6951c58b
https://doi.org/10.1016/s0040-4039(98)01995-9

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Kinetic H/D/T Isotope and Solid State Effects on the Tautomerism of the Conjugate Porphyrin Monoanion

Autor: David E. Wemmer, Reinhard Schwesinger, Hans-Heinrich Limbach, Hiromi Morimoto, Jürgen Braun, Philip G. Williams

Publikováno v: Journal of the American Chemical Society. 118:11101-11110

Using dynamic NMR spectroscopy, the kinetic isotope effects of the degenerate single hydron transfer in the conjugate 15N-labeled porphyrin anion Por-H- dissolved in organic solvents have been measured as a function of temperature. Por-H- was generat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::90f42b8ff15458173c9d91d14cb446b8
https://doi.org/10.1021/ja961313q

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Zur Kristallchemie ungeladener Phosphazen-Basen, I [1] Strukturen zweier Hydrate und eines Acetats von Tris(dimethylamino)methyliminophosphoran / Crystal Chemistry of Uncharged Phosphazene Bases, I [1] Structures of Two Hydrates and an Acetate of Tris(dimethylamino) methyliminophosphorane

Autor: Frank Hartmann, Reinhard Schwesinger, Dietrich Mootz

Publikováno v: Zeitschrift für Naturforschung B. 51:1369-1374

Two hydrates and an acetate of the uncharged, very strong phosphazene base tris(dimethylamino)methyliminophosphorane, (Me2N)3P=NMe (for short Me-P1), have been characterized by their crystal structures. A monohydrate, Me-P1 · H2O , mp. 3°C, is mono

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7143d33a4432783ff8c32b8a418afe76
https://doi.org/10.1515/znb-1996-1001

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Zur Kristallchemie ungeladener Phosphazen-Basen, II [1] Strukturen der wasserfreien Form und zweier Hydrate des Diphosphazens (Me2N)3P=N-(Me2N)2P=NH / Crystal Chemistry of Uncharged Phosphazene Bases, II [ 1] Structures o f the Anhydrous Form and Two Hydrates of the Diphosphazene (Me2N)3P =N-(Me2N)2P=NH

Autor: Christian Hasenfratz, Frank Hartmann, Dietrich Mootz, Reinhard Schwesinger

Publikováno v: Zeitschrift für Naturforschung B. 51:1375-1380

The uncharged, very strong diphosphazene base (Me2N)3P=N-(Me2N)2P=NH (for short P2) and two hydrates have been characterized by crystal structure analysis. The diphosphazene. m. p. 23°C, is triclinic with space group P1̅ and Z = 2 formula units per

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfad244624458fcc02af1ac9d81b1ae1
https://doi.org/10.1515/znb-1996-1002

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Novel, Very Strong, Uncharged Auxiliary Bases; Design and Synthesis of Monomeric and Polymer‐Bound Triaminoiminophosphorane Bases of Broadly Varied Steric Demand

Autor: Manfred Keller, Dieter Schmitt, Hans Fritz, Reinhard Schwesinger, Jürgen Willaredt, Helmut Schlemper

Publikováno v: Chemische Berichte. 127:2435-2454

The synthesis and properties of a number of very strong iminophosphorane bases up to an extremely high level of steric hindrance are described. They cover a range of ca. 4 pK units in basicity and a range of more than 11 orders of magnitude in their

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dbb9c040cd5ca100504981b432d06bc1
https://doi.org/10.1002/cber.19941271215

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