Preparation of perylene-3, 4-Dicarboxylic acid anhydrides

Details Preparation of perylene-3, 4-Dicarboxylic acid anhydrides Preparation of perylene-3, 4-Dicarboxylic acid anhydrides

1998-01-14

1999-05-04

Dentz, Bernard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548417, 549 31, C07D31178

Patent

active

059004908

ABSTRACT:
Preparation of perylene-3,4-dicarboxylic acid anhydrides of the general formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can each be independently of one another hydrogen, halogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.14 cycloalkyl, C.sub.1 -C.sub.20 alkoxy, phenyl, phenyloxy or phenylthio, where phenyl can in each case be mono- or polysubstituted by halogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.14 cycloalkyl and/or C.sub.1 -C.sub.20 alkoxy; --NR.sup.5.sub.2 or --OR.sup.5, wherein R.sup.5 is hydrogen or C.sub.1 -C.sub.20 alkyl, or one of the pairs R.sup.1 /R.sup.2 and R.sup.3 /R.sup.4 each in 6,7- or 1,12-position is a bridge having the bridge atoms or bridge atom groups --O--, --S--, S.dbd.O, SO.sub.2 or --NR.sup.6, wherein R.sup.6 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.3 -C.sub.14 cycloalkyl, by treating a perylene-3,4-dicarboximide of formula II ##STR2## (a) in a first step with a base and, (b) in a second step, reacting the resultant anion with an alkylation agent R.sup.7 --X, X being halogen and R.sup.7 being unsubstituted or phenyl-substituted C.sub.1 -C.sub.20 alkyl, to the corresponding carboximide and,

REFERENCES:
patent: 4650879 (1987-03-01), Spietschka et al.
patent: 5650513 (1997-07-01), Langhals et al.
Mol. Cryst. Liq. Cryst., 1988, vol. 158B, pp. 337-352.
Bulletin of the Chemical Society of Japan, vol. 52, (6), pp. 1723-1726 (1979).

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