ChemInform Abstract: CATALYTIC CONVERSION OF FURAN AMINES TO PYRIDINE AND PYRAZINE DERIVATIVES

Abstract

Werden die 2‐Aminoalkyl‐furane (I) über Platin oder Cu auf Aluminium bei 220 bis 300°C hydriert, so verläuft die Reaktion entweder unter Abspaltung der Aminogrup und Bildung von Alkylfuranen (II) oder unter Aufspaltung der C‐O‐Bindung zu den Ketonen (III) oder (IV).

Potassium complexes containing both crown ether and tertiary phosphine oxide ligands

“…Tertiary phosphine oxides represent another important class of ligands capable of coordinating with alkali metals.1•2•6 The socalled organophosphorus cyclopendant ligands7 containing a crown (or aza-crown) macrocycle with phosphoryl groups in its side chains represent a new class of highly important and useful complexones with unique coordination abilities. An excellent review on such cyclopendant ligands was very recently published by Bel'skii et al 8 The combination of a crown macrocycle and a tertiary phosphine oxide can be quite successfully used for extraction of alkali metals. For instance, a noticeable synergistic effect was observed in the extraction of some alkali metal cations with crown ethers in conjunction with trioctylphosphine oxide.9 At the same time, it was found that the potassium complex of dibenzo-18-crown-6 with four CH2P(0)Pli2 groups attached to the benzene rings is less stable than that of unsubstituted dibenzo-18-crown-6.10 Thus, synthesis and investigation of alkali cation complexes containing both crown ether and tertiary phosphine oxide ligands is of particular interest.…”