Functional ionic liquid mediated synthesis (FILMS) of dihydrothiophenes and tacrine derivatives
作者:Atul Kumar、Garima Gupta、Suman Srivastava
DOI:10.1039/c1gc15410a
日期:——
Natural amino acid-based functional ionic liquid [Bz-His(n-propyl)2-OMe+Br−] promoted diastereoselective synthesis of dihydrothiophenes is described. Further this functional ionic liquid was efficiently utilized to form tacrine derivatives from dihydrothiophenes using microwave irradiation. The functional ionic liquid exhibits organocatalytic as well as medium engineering capability, thus we named this synthetic protocol functional ionic liquid mediated synthesis (FILMS).
a useful readily available optically active ionicliquid. Its subsequent treatment with silver oxide gave the corresponding l-histidine derived chiral N-heterocyclic carbene complex [“(carbene)2Ag · AgBr2”]. Transmetallation by treatment with Pd(CH3CN)2Cl2 or [Rh(cod)Cl]2 led to the formation of the respective chiral late metal imidazol-2-ylidene complexes [“(carbene)2PdCl2”] and [“(carbene)RhCl(cod)”]
Theoretical evaluation on solubility of synthesized task specific ionic liquids in water
作者:Surya V.J. Yuvaraj、Oleg S. Subbotin、Rodion V. Belosludov、Vladimir R. Belosludov、Kiyoshi Kanie、Kenji Funaki、Atsushi Muramatsu、Takashi Nakamura、Hiroshi Mizuseki、Yoshiyuki Kawazoe
DOI:10.1016/j.molliq.2014.10.028
日期:2014.12
Task specific ionic liquids (TSILs) are synthesized and utilized for extraction of different metal atoms from their complexes. Since physico-chemical properties of ionic liquids (ILs) are modified by water (H2O) molecules, less hydrophilic ILs are suitable for the liquid-liquid metal extraction process. Recently, we have synthesized amino acid functionalized imidazolium based TSILs for extraction of rare earth metals. The synthesized ILs have a common functionalized cation [C20H28N3O3](+) and different anions namely, bromide-[Br](-) and bis(trifluoromethylsulfonyl)imide-[NTF2](-). In this study, various first principles (Hatree-Fock and density functional theory) and molecular mechanics calculations are done to understand intermolecular interactions between H2O and the synthesized TSILs. The results of gas phase cluster calculations project the difference in solubility of these two TSILs in H2O. (C) 2014 Elsevier B.V. All rights reserved.