Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Johannes Freudenreich"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 307-315 (2014)
2-(Dichloromethylidene)-1,1,3,3-tetramethylindane was “hydrolyzed” by solid KOH in DMSO as the solvent at ≥100 °C through an initial chlorine particle transfer to give a Cl,K-carbenoid. This short-lived intermediate disclosed its occurrence th
Externí odkaz:
https://doaj.org/article/e37b7414aacf493aa63349afd21af36e
Publikováno v:
Tetrahedron. 74:7466-7471
Steric shielding of an α,β-unsaturated nitrile R2C = CH–C N by tert-alkyl β-substituents (R) prevented 1,4-additions of organolithiums and showed a remarkably solvent-dependent selectivity of tert-butyllithium (tBuLi): 1,2-addition at C N and α
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d6f4d8f2e94b8c6cce313c6f5392b07
https://doi.org/10.1016/j.tet.2018.11.020
https://doi.org/10.1016/j.tet.2018.11.020
Autor:
Florian Jäckel, Stefan Böhm, Johannes Freudenreich, Hermann Kügler, Klaus-Gerd Eich, Rike Bartmann, Judith Burkhard, Eva Späth, Jan-Hendrik Herbst
Publikováno v:
Themenzentrierte Interaktion. 32:150-160
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cd736c3cd3fd009880b5a3ac7ee948d
https://doi.org/10.13109/tzin.2018.32.2.150
https://doi.org/10.13109/tzin.2018.32.2.150
Autor:
Johannes Freudenreich
Publikováno v:
Latin American Politics and Society. 58:80-102
Cabinet coalitions are central to the functioning of Latin American presidential systems. However, the reasons for their formation remain unclear. While recent studies suggest that presidents invite parties to the cabinet to facilitate governability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08b830eee0e24a38d1f6fffd5482ae65
https://doi.org/10.1111/laps.12003
https://doi.org/10.1111/laps.12003
Autor:
Petra Böhrer, Karsten-Olaf Hennig, Bernhard Schubert, Thomas Menke, Rudolf Knorr, Johannes Freudenreich
Publikováno v:
Tetrahedron. 70:2703-2710
Vinylic nucleophilic substitution (SNV) reactions of unactivated, cyclic α,α-dichloroalkenes [(tert-alkyl)2C CCl2] with aryllithiums (RLi) to give (tert-alkyl)2C C(Cl)–R are presented to be carbenoid chain reactions, which involve the unsaturated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c105e08164deafff048c5d91eee0fa7b
https://doi.org/10.1016/j.tet.2014.03.004
https://doi.org/10.1016/j.tet.2014.03.004
Publikováno v:
Beilstein Journal of Organic Chemistry
Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 307-315 (2014)
Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 307-315 (2014)
2-(Dichloromethylidene)-1, 1, 3, 3-tetramethylindane was "hydrolyzed" by solid KOH in DMSO as the solvent at >= 100 degrees C through an initial chlorine particle transfer to give a Cl, K-carbenoid. This short-lived intermediate disclosed its occurre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bec632c4ef41c52ccfea4b0087f1351
http://europepmc.org/articles/PMC3944619
http://europepmc.org/articles/PMC3944619
Autor:
Thomas Menke, Claudia Behringer, Petra Böhrer, Claudio Pires, Eva C. Rossmann, Rudolf Knorr, Johannes Freudenreich
Publikováno v:
Journal of the American Chemical Society. 128:14845-14853
The deceptively simple "cross-coupling" reactions Alk(2)C=CA-Cl + RLi --Alk(2)C=CA-R + LiCl (A = H, D, or Cl) occur via an alkylidenecarbenoid chain mechanism in three steps without a transition metal catalyst. In the initiating step 1, the stericall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b070a0f0d8cf731edd10adb0d624cf4
https://doi.org/10.1021/ja0649116
https://doi.org/10.1021/ja0649116
Autor:
Johannes Freudenreich
Publikováno v:
Politische Vierteljahresschrift. 52:576-578
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cfbe0eb6df2cd65fb3782a5973ea8fb
https://doi.org/10.5771/0032-3470-2011-3-576
https://doi.org/10.5771/0032-3470-2011-3-576
Publikováno v:
Tetrahedron. 50:5845-5860
Crystalline 2-(lithiomethylene)-1,1,3,3-tetramethylindan (3) forms the etherate 11 as a centrosymmetric dimer with a LiCLiC four-membered ring. The carbanionic terminal of each of the two CC double bonds is tetracoordinated, being bonded at almost eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5137b693ea021639bcb713694ff78b75
https://doi.org/10.1016/s0040-4020(01)90440-5
https://doi.org/10.1016/s0040-4020(01)90440-5
Autor:
Bernhard Schubert, Johann Mehlstäubl, Helmut Huber, Petra Böhrer, Therese von Roman, Thi Phung Hoang, David S. Stephenson, Rudolf Knorr, Johannes Freudenreich
Publikováno v:
Magnetic Resonance in Chemistry. 31:557-565
1H and 13C NMR signals were assigned and CH coupling constants (1J, 2J, 3J) determined for a series of α-mono-and α,α-disubstituted (1,1,3,3-tetramethyl-2-indanylidene)methanes with the following α-substituents: (mesityl)2B, n-propyl, phenyl, ter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fec699a0e9a8df48e86efe04c2944714
https://doi.org/10.1002/mrc.1260310608
https://doi.org/10.1002/mrc.1260310608