19227-70-4Relevant articles and documents
Orthoamides and Iminium salts, CIII. Synthesis of N,N′,N′′-persubstituted guanidinium salt-based ionic liquids by anion metathesis
Kantlehner, Willi,Mezger, Jochen,Tiritiris, Ioannis,Kre?, Ralf,Frey, Wolfgang
, (2021/02/26)
N,N′,N′′-peralkylated guanidinium chlorides and N,N′,N′′-peralkylated guanidines were prepared from N,N′-peralkylated chloroformamidinium chlorides. The alkylation of the guanidines affords N,N′,N′′-persubstituted guanidinium chlorides bromides, iodides,
Efficient Catalysts of Acyclic Guanidinium Iodide for the Synthesis of Cyclic Carbonates from Carbon Dioxide and Epoxides under Mild Conditions
Aoyagi, Naoto,Endo, Takeshi,Furusho, Yoshio
, p. 150 - 158 (2019/12/26)
We have studied the synthesis of five-membered cyclic carbonates through the cycloaddition of CO 2 to epoxides by using acyclic guanidinium salts. We have found that the cycloaddition reactions proceed smoothly at ordinary temperatures and pressures and result in good yields when acyclic guanidinium iodides are employed as catalysts. Both cation moiety and anion moiety of the guanidinium salts play important roles in their catalytic activity. It is essential to have active hydrogens on the cation moiety as well as an iodide ion as the anion moiety so as to achieve good catalytic activity. Guanidinium iodides with three or more active hydrogens give cyclic carbonates in high yields in polar solvents such as 1-methylpyrrolidin-2-one, whereas the guanidinium iodides with one or two active hydrogens show good catalytic activity in less polar solvents such as 2-methyltetrahydrofuran.
IMIDAZOLYL ALKYL GUANIDINE DERIVATIVES, PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL PREPARATIONS CONTAINING THESE COMPOUNDS
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, (2008/06/13)
New imidazolylalkyl-guanidine derivatives are described, which by virtue of their agonistic action on histamine-H 2 receptors and in part also due to their additional H 1-antagonistic receptor activity can be used in the treatment of cardiac diseases, certain forms of hypertension and diseases of arterial occlusion.These imidazolylalkyl-guanidine derivatives correspond to the general formula I: STR1