Process for preparing 2-substituted 5-formylthiazoles
申请人:Bayer AG
公开号:US06372913B1
公开(公告)日:2002-04-16
2-substituted 5-formylthiazoles are prepared in an advantageous manner by reacting halogenomalonaldehydes in the presence of a solvent and a C1-compound of the formula (III)
in which
X represents oxygen or sulfur and
R1 is as defined in the description,
the reaction mixture comprising less than 5% by weight of water.
Yttrium and lanthanide complexes of β-dialdehydes: synthesis, characterization, luminescence and electrochemistry of coordination compounds with the conjugate base of bromomalonaldehyde
Ln(NMA)3(terpy) (9Ln) (Ln = Y, Eu, Tb; BrMA = conjugate base of bromomalonaldehyde; bipyO2 = 2,2′-bipyridine-N,N′-dioxide; phen = 1,10-phenantroline; terpy = 2,2′:6′,2′′-terpyridine) were synthesized and characterized by using spectroscopic and electrochemical techniques. Uncharged europium and, to a lesser extent, terbium complexes showed appreciable luminescence in the solid state upon excitation with UV light