Preparation of alkoxy maleic anhydrides

Details Preparation of alkoxy maleic anhydrides Preparation of alkoxy maleic anhydrides

1988-05-02

1989-10-31

Lee, Mary C.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548544, C07D30756, C07D30762

Patent

active

048778877

ABSTRACT:
The invention relates to novel alkoxy substituted maleimides of the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.2 -C.sub.8 -alkenyl, phenyl or phenylalkyl, and the organic radicals may furthermore carry inert substituents, and R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl or C.sub.2 -C.sub.4 -haloalkenyl, and alkoxy-substituted maleic anhydrides of the formula II ##STR2## where R.sup.2 is C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl or C.sub.2 -C.sub.4 -haloalkenyl and Z is hydrogen, halogen or a radical OR.sup.3, where R.sup.3 is C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl or C.sub.2 -C.sub.4 -haloalkenyl.
The invention further relates to processes for preparing such maleimides I and the corresponding maleic anhydrides II and their use as graft monomers in graft polymers based on polyphenylene ethers.

REFERENCES:
patent: 3816451 (1974-06-01), Crovetti et al.
patent: 4417028 (1983-11-01), Azevedo
patent: 4582849 (1986-04-01), Marzolph et al.
Khan, J. of Pharmaceutical Sciences 73 (12), pp. 1767-1771 (1984).
Rothhaas, Annalen. der Chemie, 501, pp. 295-304 (1933).
Cope, J.A.C.S., 58, pp. 570-572 (1936)
Lynch et al., Journal of Heterocyclic Chemistry, Oct. 1972, pp. 1027-1032.
Relles et al. Journal of Organic Chemistry 37, 3637-45, (1972).

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