193352-75-9Relevant academic research and scientific papers
Urea vs. carbamate groups: a comparative study in a chiral C2 symmetric organogelator
Lascialfari, Luisa,Pescitelli, Gennaro,Brandi, Alberto,Mannini, Matteo,Berti, Debora,Cicchi, Stefano
, p. 8333 - 8341 (2015/11/09)
The effect of the replacement of molecular moieties (carbamates vs. urea) that drive self-assembly for two organogelators with an identical C2 symmetric molecular structure is described. The main properties of the gels obtained from the urea-ba
The coordination chemistry of cis-3,4-diaminopyrrolidine and related polyamines
Kuppert, Dirk,Sander, Juergen,Roth, Christian,Woerle, Michael,Weyhermueller, Thomas,Reiss, Guido J.,Schilde, Uwe,Mueller, Iris,Hegetschweiler, Kaspar
, p. 2525 - 2542 (2007/10/03)
cis-3,4-Diaminopyrrolidine (cis-dap), trans-3,4-diaminopyrrolidine (trans-dap), cis-1,2-cyclopentanediamine (cis-cptn), and trans-1,2-cyclopentanediamine (trans-cptn) have been prepared in multigram quantities. The complexation of these ligands and of 3-a
Combinatorial chemistry for ligand development in catalysis: Synthesis and catalysis screening of peptidosulfonamide tweezers on the solid phase
Brouwer, Arwin J.,van Der Linden, Heiko J.,Liskamp, Rob M. J.
, p. 1750 - 1757 (2007/10/03)
On the basis of a pyrrolidine tweezer 1, a library of peptidosulfonamide tweezers (15a-e, 16a-e was synthesized on the solid phase. This library was screened in a simultaneous substrate screening procedure for the ability to enantioselectively catalyze the Ti(O-i-Pr)4-mediated addition of diethylzinc to aldehydes. One of the best solid-phase tweezer catalyst (i.e., 16d, giving an ee of 32% in solid-phase catalysis) was resynthesized in solution (compounds 20 and 21). The now homogeneous solution-phase catalysis showed even better enantioselectivity (i.e., up to 66%).
MCM-silylamine Pd(II)complex: A heterogeneous catalyst for selective azide reductions
Kantam, M. Lakshmi,Chowdari, N. Srcenivasa,Rahman, Ateeq,Choudary
, p. 1413 - 1414 (2007/10/03)
Palladium complex immobilized on MCM-41 catalyses the reduction of alkyl, aryl and arylsulfonyl azides to the corresponding amines in excellent yields under mild conditions.
Synthesis of C2 symmetric primary vicinal diamines. Double stereospecific Mitsunobu reaction of the heterocyclic diols derived from tartaric acid
Skarzewski, Jacek,Gupta, Anil
, p. 1861 - 1867 (2007/10/03)
Homochiral 1-alkyl-3,4-dihydroxypyrrolidines, (S,S)- and (R,R)-5 were obtained by cyclization and reduction of both enantiomers of (+)- and (-)-tartaric acid, respectively. Also (S,S)-3,4-dihydroxytetrahydrofurane 6 was prepared from (+)-diethyl tartrate. All these heterocyclic vic-diols underwent twofold Mitsunobu reaction (Ph3P/DEA/HN3) followed by catalytic hydrogenation forming stereospecifically the corresponding primary vicinal diamines (R,R)-, (S,S)-2 and (R,R)-3. The absolute configuration of diamines 2, 3 was established by the exciton-coupling CD spectra of their N,N'-diphthaloyl derivatives.
