Electron-transporting materials and processes for making the...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C546S255000

Reexamination Certificate

active

07989476

ABSTRACT:
Compound of formula C is made by reacting a compound of formula A with an pyridyl boronic acid or pyridyl borate ester to form a compound of formula B; andcombining the compound of formula B with a pyridyl dihalide to form the compound of C;whereinR3, R4, R5, R6and R7are, independently at each occurrence, a C1-C20aliphatic radical, a C3-C20aromatic radical, or a C3-C20cycloaliphatic radical;X is, independently at each occurrence, CH or N;Y is chloro or bromo;Z is bromo or iodo; and when Y is bromo, Z is iodo;d, e, and g are, independently at each occurrence, an integer ranging from 0-4;f is an integer ranging from 0-2; andh is an integer ranging from 0-3.

REFERENCES:
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Su et al., “Novel Four-Pyridylbenzene-Armed Biphenyls as Electron-Transport Materials for Phosphorescent OLEDs”, Organic Letters, vol. 10., No. 5, pp. 941-944, 2008.
Su et al., “Pyridine-Containing Bipolar Host Materials for Highly Efficient BLue Phosphorescent OLEDs”, Chem. Mater., vol. 20, pp. 1691-1693, 2008.
PCT International Search Report dated Mar. 30, 2010.
PCT International Search Report dated Mar. 26, 2010.

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