Compound derived from cyclopentadienone, preparation method...

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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Reexamination Certificate

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07875748

ABSTRACT:
Disclosed are compounds represented by formula (1),wherein m, X, R1, R2, R3, R1′, R2′, R3′, and Ar are described herein. The inventive cyclopentadienone compounds can be used as core materials for an organic electroluminescence element or other optical devices. The invention also describes methods for preparing compounds of formula (1).

REFERENCES:
patent: 1994-228553 (1994-08-01), None
patent: 2002316955 (2002-10-01), None
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