Method of preparation of a precursor oligocene

Details Method of preparation of a precursor oligocene Method of preparation of a precursor oligocene

2008-07-22

2008-07-22

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S591000, C568S659000, C585S400000

Reexamination Certificate

active

10548938

ABSTRACT:
The synthesis of a precursor oligocene, particularly pentacene, is a two-step process. In the first step the Diels-Alder adduct of the a,b-dihydro-a,b-etheno-oligocene with a 1,1-dialkoxy-cyclopentadiene is formed. In the second step this Diels-Alder adduct is converted into the precursor oligocene, in that first the corresponding keto-compound is formed, which may be eliminated thereafter. The resulting precursor oligocene can be converted to the oligocene with a heat treatment, particularly after providing a solution hereof on a substrate. It is suitable for use as semiconductor material in a thin-film transistor. Formula (I).

REFERENCES:
patent: 6855949 (2005-02-01), De Leeuw et al.
patent: WO03030278 (2003-04-01), None
patent: WO03079400 (2003-09-01), None
Peter T Herwig, et al: Soluble Pentacene Precursor: Systhesis, Solid-State Conversion into Pentcene and Application in a Field-Effect Transistor, vol. 11, No. 6, 1999, pp. 480-483, XP-000829967.

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