Zobrazeno 1 - 10
of 255
pro vyhledávání: '"Helmut Reinke"'
Autor:
Manfred Michalik, Helmut Reinke, Heinz Dehne, Kerstin Drexler, Anke Scheunemann, Klaus Martens
Publikováno v:
Molecules, Vol 6, Iss 6, Pp 540-550 (2001)
The new S-alkyl thiooxal-1-hydrazono-2-amidrazonium halides 2-4 were synthesized by reaction of the corresponding zwitterionic thiooxalic acid derivatives 1 with alkyl halides in methanol. The structures of compounds 4b and 4d were proven by X-ray st
Externí odkaz:
https://doaj.org/article/e90f7d549b6348be97de61205c67325f
Publikováno v:
Molecules, Vol 5, Iss 3, Pp 245-251 (2000)
1-Methyl-10-nitro-11-phenyl(2-furyl)-2-aza-13-oxa-tricyclo[7.3.1.03,8]trideca-3,5,7-trienes 3 were synthesized via the reduction of the aromatic 2-nitro group of 2-methyl-5-nitro-6-(2-nitrophenyl)-4-phenyl(2-furyl)tetrahydropyranols 2 and subsequent
Externí odkaz:
https://doaj.org/article/6d11fa3e0c58449495f66a43cabdf4d4
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 4, Pp o1224-o1224 (2012)
In the title compound, C16H14Cl2O3, the dihedral angle between the mean planes of the two benzene rings is 55.30 (5)°. The methyl ester group lies within the ring plane due to an intramolecular O—H...O hydrogen bond [maximum deviation from the C8O
Externí odkaz:
https://doaj.org/article/03162bec212147bda993e35ab1bb5968
Publikováno v:
European Journal of Inorganic Chemistry. 2018:1302-1308
Autor:
Peter Langer, A. S. Saghiyan, Renske Klassen, Stefan Büttner, T. H. Tam Dang, Alexander Villinger, Zharylkasyn A. Abilov, Tariel V. Ghochikyan, Sebastian Reimann, Nazken K. Kelzhanova, Anke Spannenberg, Thomas Pundt, Alina Bunescu, Andreas Schmidt, Helmut Reinke
Publikováno v:
Helvetica Chimica Acta. 96:44-58
Functionalized 5-alkyl-3-(trifluoromethyl)phenols were prepared by formal [3+3] cyclization of 1,3-bis(silyloxy)buta-1,3-dienes with 1,1,1-trifluoro-4-(silyloxy)alk-3-en-2-ones derived from 1,1,1-trifluoroalkane-2,4-diones. The latter were prepared b
Autor:
Ildiko Rietz, Helmut Reinke, Jörg Harloff, Siegfried Erben, Christian Fischer, Eckhard Popowski
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 638:1187-1199
The chlorosilanes [(Me3Si)2N]HMeSiCl (1), [(Me3Si)2N]2MeSiCl (2) and [(Me3Si)2N]RPhSiCl (3: R = Me, 4: R = Ph, 5: R = (Me3Si)2N, 6: R = H) were allowed to react with lithium metal in tetrahydrofuran (THF) or in a mixture of THF/Et2O/n-pentane in the
Autor:
Wolfgang Baumann, Haijun Jiao, Helmut Reinke, Robert Franke, Detlef Selent, Andrea Christiansen, Anke Spannenberg, Armin Börner, Martin Köckerling
Publikováno v:
Chemistry - A European Journal. 17:2120-2129
O,O'-3,3'-Di-tert-butyl-5,5'-dimethoxy-1,1'-biphenyl-2,2'-diyl phosphonate (1) is the hydrolysis product of several mono- and bis-phosphites used as ligands in industrial hydroformylation and other catalytic reactions. As a result of a tautomeric equ
Publikováno v:
Tetrahedron. 65:5491-5496
Functionalized 3-aryl-4-(chloroethyl)phenols are regioselectively prepared by domino ‘[3+3] cyclization/homo-Michael’ reactions of 1,3-bis(silyloxy)-1,3-butadienes with 1-formyl- and 1-acetyl-1-aroyl-cyclopropanes.
Autor:
Đǎng Thanh Tùng, Helmut Reinke, Peter Langer, Đǎng Thanh Tuân, Christine Fischer, Alexander Villinger, Nasir Rasool
Publikováno v:
Advanced Synthesis & Catalysis. 351:1595-1609
The Suzuki reaction of tetrabromothiophene with arylboronic acids provides a regioselective approach to various 5-aryl-2,3,4-tribromothiophenes, symmetrical 2,5-diaryl-3,4-dibromothiophenes, and tetraarylthiophenes. Unsymmetrical 2,5-diaryl-3,4-dibro
Publikováno v:
Zeitschrift für Naturforschung B. 64:699-706
1,3-Bis(silyl enol ethers) represent versatile synthetic building blocks [1]. In 1980, Chan and coworkers developed an elegant approach to salicylates based on formal [3+3] cyclizations of 1,3-bis(silyl enol ethers) with 3-(silyloxy)alk-2-en-1-ones [