Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Lena Winner"'
Autor:
K. Geetharani, Marius Schäfer, Theresa Dellermann, Holger Braunschweig, William C. Ewing, Lena Winner, Brian Jouppi, Thomas Kupfer
Publikováno v:
Angewandte Chemie. 130:12455-12459
Autor:
Marius Schäfer, Guillaume Bélanger-Chabot, Holger Braunschweig, Lena Winner, Mehmet Ali Celik
Publikováno v:
Chemical communications (Cambridge, England). 54(67)
Two unusual reactions were demonstrated with iminoboranes, both leading to aminoboranes of the type R2B[double bond, length as m-dash]NR2. In one case, a carboboration of di(tert-butyl)iminoborane with B(C6F5)3 led to (tBu)(C6F5)B-N(tBu)(B(C6F5)2). I
Autor:
Guillaume Bélanger-Chabot, Holger Braunschweig, Oscar F. Gonzalez-Belman, Alexander Hermann, Hauke Kelch, J. Oscar C. Jiménez-Halla, Lena Winner
Publikováno v:
Chemical communications (Cambridge, England). 54(59)
We report two rare instances of an insertion into the strong (ca. 170 kcal mol-1) BN triple bond of iminoboranes. In the first, a silylene inserts into di-tert-butyliminoborane to form an iminosilane. In the second, the highly crowded iminoborane Ter
Autor:
Holger Braunschweig, Brian Jouppi, William C. Ewing, Lena Winner, Marius Schäfer, Thomas Kupfer, Theresa Dellermann, K. Geetharani
Publikováno v:
Angewandte Chemie (International ed. in English). 57(38)
The first spontaneous, metal-free, room-temperature hydrogen transfer from ammonia borane to an iminoborane is reported. Mechanistic studies of the reaction indicate a concerted transfer of H+ and H- from donor to acceptor with an activation energy f
Publikováno v:
Topics in Catalysis. 58:441-450
Tetrameric Ti(IV)–calix[4]arene complexes were synthesized and characterized as well as grafted on a hydroxylated SiO2 inorganic support as an example of patterned Lewis-acid sites on an inorganic oxide surface. These complexes consist of a novel c
Autor:
Merle Arrowsmith, Sunewang Rixin Wang, Holger Braunschweig, Lena Winner, Rian D. Dewhurst, Valerie Paprocki
Publikováno v:
Chem. Commun.
Upon complexation to CuOTf, a PMe\(_3\)-stabilized bis(9-anthryl) diborene slowly undergoes an intramolecular hydroarylation reaction at room temperature. Subsequent triflation of the B–H bond with CuOTf, followed by a PMe\(_3\) transfer, finally y