TY  - JOUR
A1  - Schmidt, Bernd
A1  - Riemer, Martin
A1  - Schilde, Uwe
T1  - Chroman-4-ones via microwave-promoted domino claisen rearrangement-oxa-michael addition: Synthesis of tabchromones A and B
JF  - Synlett : accounts and rapid communications in synthetic organic chemistry
N2  - Allyl phenyl ethers with a pendant enone substituent undergo, upon microwave irradiation, a domino sequence of Claisen rearrangement and 6-endo-trig-cyclization to furnish functionalized chroman-4-ones. The natural products tabchromones A and B were synthesized via this method.
KW  - cyclization
KW  - Michael addition
KW  - rearrangement
KW  - tandem reaction
KW  - Wacker reaction
Y1  - 2014
U6  - https://doi.org/10.1055/s-0034-1379364
SN  - 0936-5214
SN  - 1437-2096
VL  - 25
IS  - 20
SP  - 2943
EP  - 2946
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Moskalik, Mikhail Yu.
A1  - Astakhova, Vera V.
A1  - Schilde, Uwe
A1  - Sterkhova, Irina V.
A1  - Shainyan, Bagrat A.
T1  - Assembling of 3,6-diazabicyclo[3.1.0]hexane framework in oxidative triflamidation of substituted buta-1,3-dienes
JF  - Tetrahedron
KW  - Trifluoromethanesulfonamide
KW  - Arenesulfonamides
KW  - Cycloaddition
KW  - 1,3-Dienes
KW  - 3,6-Diazabicyclo[3.1.0]hexanes
KW  - X-ray
Y1  - 2014
U6  - https://doi.org/10.1016/j.tet.2014.09.050
SN  - 0040-4020
VL  - 70
IS  - 45
SP  - 8636
EP  - 8641
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Shainyan, Bagrat A.
A1  - Moskalik, Mikhail Yu
A1  - Astakhova, Vera V.
A1  - Schilde, Uwe
T1  - Novel design of 3,8-diazabicyclo[3.2.1]octane framework in oxidative sulfonamidation of 1,5-hexadiene
JF  - Tetrahedron
N2  - 1,5-Hexadiene reacts with trifluoromethanesulfonamide in the oxidative system (t-BuOCl+Nal) to give trans-2,5-bis(iodomethyl)-1-(trifluoromethylsulfonyl)pyrrolidine 5 and 3,8-bis(trifluoromethylsulfonyl)-3,8-diazabicyclo[3.2.1]octane 6. With arenesulfonamides ArSO2NH2 (Ar=Ph, Tol), the reaction stops at the formation of the trans and cis isomers of 2,5-bis(iodomethyl)-1-(arenesulfonyl)pyrrolidine 7 and 8 (1:1). The cis isomers of 7 and 8 do not undergo cyclization to the corresponding 3,8-disubstituted 3,8-diazabicyclo[3.2.1]octanes. The reaction with triflamide represents the first example of one-pot two-step route to 3,8-diazabicyclo[3.2.1]octane system. (C) 2014 Elsevier Ltd. All rights reserved.
KW  - Trifluoromethanesulfonamide
KW  - Arenesulfonamides
KW  - 1,5-Dienes
KW  - Cycloaddition
KW  - 3,8-Diazabicyclo[3.2.1]octane
KW  - X-ray
Y1  - 2014
U6  - https://doi.org/10.1016/j.tet.2014.04.095
SN  - 0040-4020
VL  - 70
IS  - 30
SP  - 4547
EP  - 4551
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - GEN
A1  - Mondal, Suvendu Sekhar
A1  - Bhunia, Asamanjoy
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - A supramolecular Co(II)₁₄-metal–organic cube in a hydrogen-bonded network and a Co(II)–organic framework with a flexible methoxy substituent
N2  - The reaction of 4,5-dicyano-2-methoxyimidazole (L1) with Co(NO3)2·6H2O under solvothermal conditions in DMF, a MOF, IFP-8 and a hydrogen-bonded network consisting of tetradecanuclear Co(II)14-metal organic cube (1) are achieved. 1 shows the bcu net with 14 cobalt atoms.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 169 
KW  - zinc
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-74098
IS  - 169
SP  - 5441
EP  - 5443
ER  - 
TY  - JOUR
A1  - Mondal, Suvendu Sekhar
A1  - Mueller, Holger
A1  - Junginger, Matthias
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Strehmel, Veronika
A1  - Holdt, Hans-Jürgen
T1  - Imidazolium 2-substituted 4,5-dicyanoimidazolate ionic liquids: synthesis, crystal structures and structure-thermal property relationships
JF  - Chemistry - a European journal
N2  - Thirty six novel ionic liquids (ILs) with 1-butyl-3-methylimidazolium and 3-methyl-1-octylimidazolium cations paired with 2-substitited 4,5-dicyanoimidazolate anions (substituent at C2=chloro, bromo, methoxy, vinyl, amino, methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl and phenyl) have been synthesized and characterized by using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and single-crystal X-ray crystallography. The effects of cation and anion type and structure on the thermal properties of the resulting ionic liquids, including several room temperature ionic liquids (RTILs) are examined and discussed. ILs exhibited large liquid and crystallization ranges and formed glasses on cooling with glass transition temperatures in the range of -22 to -68 degrees C. The effects of alkyl substituents of the imidazolate anion reflected the crystallization, melting points and thermal decomposition of the ILs. The Coulombic packing force, van der Waals forces and size of the anions can be considered for altering the thermal transitions. Three crystal structures of the ILs were determined and the effects of changes to the cations and anions on the packing of the structure were investigated.
KW  - crystal structures
KW  - imidazole
KW  - ion exchange
KW  - ionic liquids
KW  - pi-pi stacking
Y1  - 2014
U6  - https://doi.org/10.1002/chem.201304934
SN  - 0947-6539
SN  - 1521-3765
VL  - 20
IS  - 26
SP  - 8170
EP  - 8181
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Mondal, Suvendu Sekhar
A1  - Bhunia, Asamanjoy
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - Giant Zn-14 molecular building block in hydrogen-bonded network with permanent porosity for gas uptake
JF  - Journal of the American Chemical Society
N2  - In situ imidazolate-4,5-diamide-2-olate linker generation leads to the formation of a [Zn-14(L2)(12)(O)-(OH)(2)(H2O)(4)] molecular building block (MBB) with a Zn-6 octahedron inscribed in a Zn-8 cube. The MBBs connect by amide-amide hydrogen bonds to a 3D robust supramolecular network which can be activated for N-2, CO2, CH4, and H-2 gas sorption.
Y1  - 2014
U6  - https://doi.org/10.1021/ja410595q
SN  - 0002-7863
VL  - 136
IS  - 1
SP  - 44
EP  - 47
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - JOUR
A1  - Mondal, Suvendu Sekhar
A1  - Bhunia, Asamanjoy
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - A supramolecular Co(II)(14)- metal-organic cube in a hydrogen-bonded network and a Co(II)-organic framework with a flexible methoxy substituent
JF  - Chemical communications
N2  - The reaction of 4,5-dicyano-2-methoxyimidazole (L1) with Co(NO3)(2.) 6H(2)O under solvothermal conditions in DMF, a MOF, IFP-8 and a hydrogen-bonded network consisting of tetradecanuclear Co(II)(14)-metal organic cube (1) are achieved. 1 shows the bcu net with 14 cobalt atoms.
Y1  - 2014
U6  - https://doi.org/10.1039/c3cc49698h
SN  - 1359-7345
SN  - 1364-548X
VL  - 50
IS  - 41
SP  - 5441
EP  - 5443
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Mondal, Suvendu Sekhar
A1  - Bhunia, Asamanjoy
A1  - Demeshko, Serhiy
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - Synthesis of a Co(II)-imidazolate framework from an anionic linker precursor: gas-sorption and magnetic properties
JF  - CrystEngComm
N2  - A Co(II)-imidazolate-4-amide-5-imidate based MOF, IFP-5, is synthesized by using an imidazolate anion-based novel ionic liquid as a linker precursor under solvothermal conditions. IFP-5 shows significant amounts of gas (N-2, CO2, CH4 and H-2) uptake capacities. IFP-5 exhibits an independent high spin Co(II) centre and antiferromagnetic coupling.
Y1  - 2014
U6  - https://doi.org/10.1039/c3ce42040j
SN  - 1466-8033
VL  - 16
IS  - 1
SP  - 39
EP  - 42
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Winter, Alette
A1  - Thiel, Kerstin
A1  - Zabel, Andre
A1  - Klamroth, Tillmann
A1  - Poeppl, Andreas
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Taubert, Andreas
A1  - Strauch, Peter
T1  - Tetrahalidocuprates(II) - structure and EPR spectroscopy. Part 2: tetrachloridocuprates(II)
JF  - New journal of chemistry
N2  - We present and discuss the results of crystallographic and electron paramagnetic resonance (EPR) spectroscopic analyses of five tetrachloridocuprate(II) complexes to supply a useful tool for the structural characterisation of the [CuCl4](2-) moiety in the liquid state, for example in ionic liquids, or in solution. Bis(benzyltriethylammonium)-, bis(trimethylphenylammonium)-, bis(ethyltriphenylphosphonium)-, bis(benzyltriphenylphosphonium)-, and bis(tetraphenylarsonium) tetrachloridocuprate(II) were synthesised and characterised by elemental, IR, EPR and X-ray analyses. The results of the crystallographic analyses show distorted tetrahedral coordination geometry of all [CuCl4](2-) anions in the five complexes and prove that all investigated complexes are stabilised by hydrogen bonds of different intensities. Despite the use of sterically demanding ammonium, phosphonium and arsonium cations to obtain the separation of the paramagnetic Cu(II) centres for EPR spectroscopy no hyperfine structure was observed in the EPR spectra but the principal values of the electron Zeeman tensor, g(parallel to) and g(perpendicular to), could be determined. With these EPR data and the crystallographic parameters we were able to carry out a correlation study to anticipate the structural situation of tetrachloridocuprates in different physical states. This correlation is in good agreement with DFT calculations.
Y1  - 2014
U6  - https://doi.org/10.1039/c3nj01039b
SN  - 1144-0546
SN  - 1369-9261
VL  - 38
IS  - 3
SP  - 1019
EP  - 1030
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -