Branched Oligoarylsilanes and Method for Producing Same
申请人:"LUMINESCENT INNOVATION TECHNOLOGIES" LIMITED LIABILITY COMPANY
公开号:US20160108065A1
公开(公告)日:2016-04-21
Novel branched oligoarylsilanes of general formula (I)
A method of preparation of branched oligoarylsilanes is that a compound of general formula (III) Y-Q
k
-SiAr
n
—R)
3
(III), where Y stands for a residue of boronic acid or its ester or Br or I, reacts under Suzuki conditions with a reagent of general formula (IV) A-X
m
-A (IV), where A stands for: Br or I, provided that Y stands for a residue of boronic acid or its ester; or a residue of boronic acid or its ester, provided that Y stands for Br or I. A technical result is preparation of novel compounds, featured by a high luminescence efficiency, efficient intramolecular energy transfer from some molecular fragments to others, and an increased thermal stability.
Novel syntheses of symmetrical 2,5-diaryl-1,3,4-oxadiazoles and 1,4-phenylenebis-1,3,4-oxadiazoles
作者:L. I. Belen'kii、S. I. Luiksaar、I. S. Poddubnyi、M. M. Krayushkin
DOI:10.1007/bf02494289
日期:1998.11
excess hydrazine hydrate in ethanol gives symmetrical 2,5-diaryl-1,3,4-oxadiazoles in 68–96% yields. The reaction of 1,4-bis(trichloromethyl)benzene with acylhydrazines in an ethanol-pyridine mixture gives the corresponding substituted or unsubstituted 1,4-phenylenebis-1,3,4-oxadiazoles in 35–51% yields. The mass spectra of 2,5-diaryl-1,3,4-oxadiazoles and 1,4-phenylenebis-1,3,4-oxadiazoles were studied