928048-94-6Relevant academic research and scientific papers
Chiral ionic liquids supported on natural sporopollenin microcapsules
Palazzo, Ivan,Mezzetta, Andrea,Guazzelli, Lorenzo,Sartini, Stefania,Pomelli, Christian Silvio,Parker, Wallace O.,Chiappe, Cinzia
, p. 21174 - 21183 (2018/06/26)
Supported chiral ionic liquids (SILs) were prepared choosing the starting material for the ionic liquid part from the enantiopure stock of the chiral pool (monoterpenoids and an amino acid) and the sporopollenin as an environmentally friendly support. Sporopollenins are microcapsules with naturally well-defined sizes and shapes that can be obtained from pollen grains after removal of the internal cytoplasm and the second shell layer. As thermally stable organic biocompatible structures, sporopollenins have attracted increasing interest in recent years for several applications. Herein, bio-based ILs were anchored onto the surface of sporopollenins obtained from the pollen of Populus deltoides, selected as a model pollen grain. These new structures, which present an external positively charged shell, were characterized by physico-chemical techniques (ATR-FTIR, TGA, SEM, EDX, and solid-state 13C NMR). A metathesis reaction was also performed on selected bio-based IL modified sporopollenins, demonstrating the possibility to switch the surface properties by exploiting well-known IL chemistry.
Synthesis of new chiral imidazolium salts derived from amino acids: their evaluation in chiral molecular recognition
Altava, Belen,Barbosa, Dalgi S.,Isabel Burguete,Escorihuela, Jorge,Luis, Santiago V.
scheme or table, p. 999 - 1003 (2009/10/10)
A family of new imidazolium salts derived from natural amino acids has been synthesized and tested for NMR enantiodiscrimination, as chiral shift reagents, of carboxylic acids. These imidazolium receptors contain different structural modifications and the
Chiral bisimidazolium salts derived from amino acids and their palladium(II)- and platinum(II)-biscarbene complexes
Meyer, Anke,Taige, Maria A.,Strassner, Thomas
experimental part, p. 1861 - 1868 (2009/08/14)
We report new chiral bisimidazolium salts synthesized from naturally occurring l-amino acids. They served as precursors for bidentate N-heterocyclic carbene metal complexes. The chiral imidazoles could be synthesized in good yields via a one-pot ring clos
